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| Mendeliome v1.1859 | SERPINA11 |
Ain Roesley gene: SERPINA11 was added gene: SERPINA11 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SERPINA11 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SERPINA11 were set to 38831697 Review for gene: SERPINA11 was set to RED gene: SERPINA11 was marked as current diagnostic Added comment: 1 family with 2 fetuses. 1st fetus presented with isolated pericardial effusion and a TOP was opted. post mortem: mild subcutaneous edema with subtle facial dysmorphic features small gelatinous glistening cyst on the right pericardium. Bilateral pleural effusion and multiple similar cysts were noted on the lung surfaces 2nd fetus also presented with pleural and pericardial effusion and a TOP was opted post mortem findings were similar to fetus#1 homozygous nonsense variant in SERPINA11 was found p.(Tyr224*) Immunofluorescence of lung sections from fetus#1 and a gestation-matched fetus as a control demonstrated undetectable levels of SERPINA11 in the bronchiolar epithelium Sources: Literature |
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| Mendeliome v1.1857 | PSMD11 |
Bryony Thompson gene: PSMD11 was added gene: PSMD11 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PSMD11 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PSMD11 were set to 38866022; 30733659 Phenotypes for gene: PSMD11 were set to Neurodevelopmental disorder, MONDO:0700092, PSMD11-related Review for gene: PSMD11 was set to GREEN Added comment: PMID: 38866022 - 10 unrelated children with early-onset syndromic intellectual disability and neurodevelopmental delay with recurrent obesity. Cognitive impairment is recapitulated in a drosophila model. Loss of function is the mechanism of disease PMID: 30733659 - 4 probands with ID and different 17q11.2 deletions spanning PSMD11 Sources: Literature |
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| Mendeliome v1.1790 | ZNF41 |
Zornitza Stark gene: ZNF41 was added gene: ZNF41 was added to Mendeliome. Sources: Expert Review disputed tags were added to gene: ZNF41. Mode of inheritance for gene: ZNF41 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: ZNF41 were set to 14628291; 23871722 Phenotypes for gene: ZNF41 were set to non-syndromic X-linked intellectual disability MONDO:0019181 Review for gene: ZNF41 was set to RED Added comment: DISPUTED by ClinGen. Shoichet et al. (2003) described a female patient with severe nonsyndromic mental retardation and a de novo balanced translocation t(X;7)(p11.3;q11.21) in whom they cloned the DNA fragment that contained the X chromosomal and the autosomal breakpoint. In silico sequence analysis demonstrated that the ZNF41 gene was disrupted. Expression studies indicated that ZNF41 transcripts were absent in the patient cell line, suggesting that the mental disorder in this patient resulted from loss of functional ZNF41. Screening of patients with mental retardation led to the identification of 2 other ZNF41 mutations that were not found in healthy control individuals. Based on their finding of the mutations in ZNF41 identified by Shoichet et al. (2003) in a total of 7 males in the NHLBI Exome Variant Server, and the additional finding of truncating ZNF41 variants in 1 male and 1 female in that database, Piton et al. (2013) classified the involvement of ZNF41 in mental retardation as highly questionable. Sources: Expert Review |
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| Mendeliome v1.1787 | AGTR2 |
Zornitza Stark changed review comment from: Variants in AGTR2 have been reported in individuals presenting various neurodevelopmental phenotypes, including intellectual disability, autistic features, epileptic seizures, speech delay, restlessness, and hyperactivity, as early as 2002. Per criteria outlined by the ClinGen Lumping and Splitting Working Group, we found no difference in molecular mechanism, inheritance pattern, or phenotypic variability. Therefore, for the purposes of this curation, all of these features have been lumped into one disease entity, X-linked complex neurodevelopmental disorder. Although eight unique variants, including missense and truncating, have been reported in affected humans, the majority (six) have been ruled out from disease-causality based on high frequency in control populations (Piton et al., PMID 23871722), occurrence in unaffected males (Erdmann et al., PMID 14722754), non-segregation within a family (Bienvenu et al., PMID 12746399), and lack of enrichment in patients in a case-control study (Huang et al., PMID 16283672). Given that the two remaining variants are missense with no supporting functional evidence, and AGTR2 was the only gene sequenced in each case, the ClinGen Intellectual Disability and Autism Working Group recommended awarding 0 points for these variants. There are two AGTR2 mouse models which collectively show altered neuronal spine morphology, spatial memory impairment, delayed learning, and reduced exploratory behavior (PMIDs 18335189 and 7477267). Sources: Expert Review; to: DISPUTED by ClinGen: Variants in AGTR2 have been reported in individuals presenting various neurodevelopmental phenotypes, including intellectual disability, autistic features, epileptic seizures, speech delay, restlessness, and hyperactivity, as early as 2002. Per criteria outlined by the ClinGen Lumping and Splitting Working Group, we found no difference in molecular mechanism, inheritance pattern, or phenotypic variability. Therefore, for the purposes of this curation, all of these features have been lumped into one disease entity, X-linked complex neurodevelopmental disorder. Although eight unique variants, including missense and truncating, have been reported in affected humans, the majority (six) have been ruled out from disease-causality based on high frequency in control populations (Piton et al., PMID 23871722), occurrence in unaffected males (Erdmann et al., PMID 14722754), non-segregation within a family (Bienvenu et al., PMID 12746399), and lack of enrichment in patients in a case-control study (Huang et al., PMID 16283672). Given that the two remaining variants are missense with no supporting functional evidence, and AGTR2 was the only gene sequenced in each case, the ClinGen Intellectual Disability and Autism Working Group recommended awarding 0 points for these variants. There are two AGTR2 mouse models which collectively show altered neuronal spine morphology, spatial memory impairment, delayed learning, and reduced exploratory behavior (PMIDs 18335189 and 7477267). Sources: Expert Review |
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| Mendeliome v1.1787 | AGTR2 |
Zornitza Stark gene: AGTR2 was added gene: AGTR2 was added to Mendeliome. Sources: Expert Review disputed tags were added to gene: AGTR2. Mode of inheritance for gene: AGTR2 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Phenotypes for gene: AGTR2 were set to X-linked complex neurodevelopmental disorder MONDO:0100148 Review for gene: AGTR2 was set to RED Added comment: Variants in AGTR2 have been reported in individuals presenting various neurodevelopmental phenotypes, including intellectual disability, autistic features, epileptic seizures, speech delay, restlessness, and hyperactivity, as early as 2002. Per criteria outlined by the ClinGen Lumping and Splitting Working Group, we found no difference in molecular mechanism, inheritance pattern, or phenotypic variability. Therefore, for the purposes of this curation, all of these features have been lumped into one disease entity, X-linked complex neurodevelopmental disorder. Although eight unique variants, including missense and truncating, have been reported in affected humans, the majority (six) have been ruled out from disease-causality based on high frequency in control populations (Piton et al., PMID 23871722), occurrence in unaffected males (Erdmann et al., PMID 14722754), non-segregation within a family (Bienvenu et al., PMID 12746399), and lack of enrichment in patients in a case-control study (Huang et al., PMID 16283672). Given that the two remaining variants are missense with no supporting functional evidence, and AGTR2 was the only gene sequenced in each case, the ClinGen Intellectual Disability and Autism Working Group recommended awarding 0 points for these variants. There are two AGTR2 mouse models which collectively show altered neuronal spine morphology, spatial memory impairment, delayed learning, and reduced exploratory behavior (PMIDs 18335189 and 7477267). Sources: Expert Review |
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| Mendeliome v1.1786 | AVPR1A |
Zornitza Stark gene: AVPR1A was added gene: AVPR1A was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: AVPR1A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AVPR1A were set to 24924430 Phenotypes for gene: AVPR1A were set to Autism spectrum disorder MONDO:0005258 Review for gene: AVPR1A was set to RED Added comment: DISPUTED by ClinGen: The Arginine Vasopressin Receptor 1A (AVPR1A) was considered a candidate gene in autism spectrum disorder (ASD) based on reports focused on linkage intervals and animal models. Additionally, experimental evidence showed that AVPR1A is possibly involved in social behaviors, including affiliation and attachment (PMID: 24924430). However, these association studies were underpowered—sequencing more individuals may have identified variants of functional significance. In two studies, transmission disequilibrium between AVPR1A microsatellites and autism were found but most were not statistically significant (PMID: 12082568, 16520824). In another study, investigators screened AVPR1A exons in 125 independent autistic probands (PMID: 15098001). However, the study did not demonstrate a disease-causing variant in the coding sequence, and the authors noted that differences in AVPR1A at the amino-acid level are unlikely to confer genetic vulnerability to autism. Experimental evidence is available, but, in the absence of human genetic evidence, such data were not utilized in the scoring. In summary, there is no valid genetic evidence to support an association between AVPR1A and autism spectrum disorder. Sources: Expert list |
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| Mendeliome v1.1756 | CCDC91 |
Bryony Thompson gene: CCDC91 was added gene: CCDC91 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CCDC91 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CCDC91 were set to 38627542 Phenotypes for gene: CCDC91 were set to Punctate palmoplantar keratoderma type III MONDO:0007047 Review for gene: CCDC91 was set to AMBER Added comment: A single 3-generation Chinese acrokeratoelastoidosis family segregates c.1101 + 1 G > A (causes exon 11 skipping). In vitro knockdown experiments in cell lines demonstrated distended Golgi cisternae, cytoplasmic vesicle accumulation, and lysosome presence. Immnunostaining of si-CCDC91-human skin fibroblasts cells demonstrated tropoelastin accumulation in the Golgi and abnormal extracellular aggregates Sources: Literature |
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| Mendeliome v1.1734 | PQLC2 |
Chirag Patel gene: PQLC2 was added gene: PQLC2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PQLC2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PQLC2 were set to PMID: 35486108; and online publication GiM Feb 2024 Phenotypes for gene: PQLC2 were set to Retinitis pigmentosa, MONDO:0019200 Review for gene: PQLC2 was set to GREEN gene: PQLC2 was marked as current diagnostic Added comment: HGNC Gene Symbol: SLC66A1 Total 8 individuals from 6 families. Millo et al. (2022)(PMID: 35486108) - WES (with targeted analysis of SLC genes) in 913 cases from 785 families with inherited retinal dystrophy. They identified 2 different homozygous variants in SLC66A1 in 3 individuals from 2 families with adult-onset retinal dystrophy. No functional data. Olinger et al. (2024)(https://www.sciencedirect.com/science/article/pii/S2949774424009804) - CNV analysis of trio and non-trio WGS data from Genomics England 100K genomes project. They identified homozygous 21kb deletion spanning nearly entire SLC66A1 gene in 2 siblings with adult-onset rod-cone dystrophy (parents HTZ carriers). Review of cohort data then identified homozygous LOF variants (1 nonsense, 2 frameshift) in another 3 individuals with rod-cone dystrophy. Sources: Literature |
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| Mendeliome v1.1732 | PRMT9 |
Chirag Patel gene: PRMT9 was added gene: PRMT9 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRMT9 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PRMT9 were set to PMID: 38561334 Phenotypes for gene: PRMT9 were set to Neurodevelopmental disorder, MONDO:0100500 Review for gene: PRMT9 was set to RED Added comment: A homozygous variant (G189R) in PRMT9 is reported based on large WGS study in 136 consanguineous families - unclear if only found in 1 family and no clinical information on case(s). PMRTs (protein arginine methyltransferases) catalyse post translational modification via arginine methylation. Functional studies showed that the G189R variant abolishes PRMT9's methyltransferase activity - specifically at the R508 residue of SF3B2 RNA (exclusively methylated by PRMT9) - and leads to heavy PRMT9 ubiquitination, and abnormal splicing activity of SF3B2. Knock out mouse model showed PRMT9 loss in excitatory neurons leads to aberrant synapse development and impaired learning and memory. Sources: Literature |
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| Mendeliome v1.1715 | KIAA1024L |
Achchuthan Shanmugasundram gene: KIAA1024L was added gene: KIAA1024L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KIAA1024L was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: KIAA1024L were set to 35727972 Phenotypes for gene: KIAA1024L were set to Deafness, autosomal recessive 120, OMIM:620238 Review for gene: KIAA1024L was set to GREEN Added comment: New gene name - MINAR2 PMID:35727972 reported 13 patients from four unrelated families with non-syndromic sensorineural hearing loss. Four of these patients had prelingual onset of severe to profound, progressive bilateral hearing loss. The other nine patients had congenital onset of severe to profound bilateral hearing loss, which was not progressive on one patient, while data was not available for the other. Three different homozygous variants (c.144G > A/ p.Trp48Ter, c.412_419delCGGTTTTG/ p.Arg138Valfs*10 and c.393G > T/ p.Lys131Asn) were identified in MINAR2/ KIAA1024L gene in these patients. There is some functional evidence available for the p.Lys131Asn variant. In addition, mice with loss of function of the Minar2 protein present with rapidly progressive sensorineural hearing loss. This gene has also been associated with relevant phenotype in OMIM (MIM #620238). Sources: Literature |
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| Mendeliome v1.1696 | PTCRA |
Achchuthan Shanmugasundram gene: PTCRA was added gene: PTCRA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PTCRA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PTCRA were set to 38422122 Phenotypes for gene: PTCRA were set to Autoimmunity, HP:0002960; lymphopenia, MONDO:0003783 Review for gene: PTCRA was set to GREEN Added comment: PMID:38422122 reported the identification of 10 individuals from seven kindreds from four different ethnicities with biallelic PTCRA variants (homozygous in five kindreds and compound heterozygous in two kindreds). Six of these 10 patients were clinically asymptomatic at their most recent evaluation, while other four patients displayed infection, lymphoproliferation, and/or autoimmunity with an onset during their teens or in adulthood. One of these patients died from SARS-CoV-2 pneumonia at the age of 24 years. Patient 9 had a small thymus on MRI at the age of 2 years, whereas P5 and P6 had no visible thymus at the ages of 13 and 8 years, respectively. Three of the nine patients with pLOF PTCRA variants tested were found to produce autoantibodies, several of which were associated with clinical manifestations. Anti-thyroid autoantibodies and/or clinically overt thyroiditis were found in three of the nine patients. P7, who suffered from recurrent herpes infections, had autoantibodies against type I interferons. Two of those identified variants are hypomorphic and are associated with autoimmunity. In addition, there is extensive functional and epidemiological data available. Sources: Literature |
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| Mendeliome v1.1674 | SEPHS1 |
Zornitza Stark gene: SEPHS1 was added gene: SEPHS1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SEPHS1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SEPHS1 were set to 38531365 Phenotypes for gene: SEPHS1 were set to Neurodevelopmental disorder, MONDO:0700092, SEPHS1-related Review for gene: SEPHS1 was set to GREEN Added comment: Nine individuals from eight families with developmental delay, growth and feeding problems, hypotonia, and dysmorphic features, all with heterozygous missense variants in SEPHS1. Eight of these individuals had a recurrent variant at amino acid position 371 of SEPHS1 (p.Arg371Trp, p.Arg371Gln, and p.Arg371Gly); seven of these variants were known to be de novo. Sources: Literature |
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| Mendeliome v1.1633 | USP14 |
Zornitza Stark gene: USP14 was added gene: USP14 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: USP14 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: USP14 were set to 38469793; 35066879 Phenotypes for gene: USP14 were set to Syndromic disease MONDO:0002254, USP14-related Review for gene: USP14 was set to GREEN Added comment: PMID 35066879: 3 fetuses from 2 different branches of a consanguineous family, presenting with distal arthrogryposis, underdevelopment of the corpus callosum, and dysmorphic facial features. Exome sequencing identified a biallelic 4-bp deletion (c.233_236delTTCC; p.Leu78Glnfs*11) in USP14, and sequencing of family members showed segregation with the phenotype. Ubiquitin-specific protease 14 (USP14) encodes a major proteasome-associated deubiquitinating enzyme with an established dual role as an inhibitor and an activator of proteolysis, maintaining protein homeostasis. Usp14-deficient mice show a phenotype similar to lethal human multiple congenital contractures phenotypes, with callosal anomalies, muscle wasting, and early lethality, attributed to neuromuscular junction defects due to decreased monomeric ubiquitin pool. RT-qPCR experiment in an unaffected heterozygote revealed that mutant USP14 was expressed, indicating that abnormal transcript escapes nonsense-mediated mRNA decay. PMID 38469793: biallelic USP14 variants in four individuals from three unrelated families: one fetus, a newborn with a syndromic NDD, and two siblings affected by a progressive neurological disease. Specifically, the two siblings from the latter family carried two compound heterozygous variants c.8T>C p.(Leu3Pro) and c.988C>T p.(Arg330*), while the fetus had a homozygous frameshift c.899_902del p.(Lys300Serfs*24) variant and the newborn patient harbored a homozygous frameshift c.233_236del p.(Leu78Glnfs*11) variant. The fetus and the newborn had extensive brain malformations. Sources: Literature |
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| Mendeliome v1.1596 | CIAO1 |
Paul De Fazio changed review comment from: PMID:38196629 (note pre-print) describes 4 unrelated patients with core features of progressive muscle weakness, respiratory insufficiency, joint hyperlaxity, ankle tightness, calf pseudohypertrophy, elevated CK, and larning disabilities/difficulties. 2 patients presented with increased iron deposition in the brain. Age of recognition of myopathic symptoms varied from early childhood to adolescence. PMID: 38411040 reports 2 unrelated patients. Patient 1 was born with microcephaly and borderline hypertonia, and died at 18 months of respiratory failure from bronchiolitis. Patient 2 presented with failure to thrive, a hyperkinetic movement disorder, and autism before deteriorating in late teens with muscle weakness, recurrent pneuomonia with respiratory insufficiency, and eventually death due to multi-organ failure with carnificating pneumonia, septic cardiomyopathy, and intracranial hemorrhages. Immune deficiency was ruled out. All variants reported were homozygous or compound heterozygous missense variants, with the exception of one large in-frame deletion of exon 7. Cell line studies showed the variants resulted in reduced protein stability and downstream cellular defects which could be rescued by wild-type CIAO1. Sources: Literature; to: PMID:38196629 (note pre-print) describes 4 unrelated patients with core features of progressive muscle weakness, respiratory insufficiency, joint hyperlaxity, ankle tightness, calf pseudohypertrophy, elevated CK, and larning disabilities/difficulties. 2 patients presented with increased iron deposition in the brain. Age of recognition of myopathic symptoms varied from early childhood to adolescence. Muscle biopsy showed variation in fiber size and an increase in internalized nuclei, as well as scattered degenerating/regenerating fibers and a mild to minimal increase in endomysial fibrosis. Electron microscopy revealed morphologically abnormal mitochondria. PMID: 38411040 reports 2 unrelated patients. Patient 1 was born with microcephaly and borderline hypertonia, and died at 18 months of respiratory failure from bronchiolitis. Patient 2 presented with failure to thrive, a hyperkinetic movement disorder, and autism before deteriorating in late teens with muscle weakness, recurrent pneuomonia with respiratory insufficiency, and eventually death due to multi-organ failure with carnificating pneumonia, septic cardiomyopathy, and intracranial hemorrhages. Immune deficiency was ruled out. All variants reported were homozygous or compound heterozygous missense variants, with the exception of one large in-frame deletion of exon 7. Cell line studies showed the variants resulted in reduced protein stability and downstream cellular defects which could be rescued by wild-type CIAO1. |
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| Mendeliome v1.1596 | CIAO1 |
Paul De Fazio gene: CIAO1 was added gene: CIAO1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CIAO1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CIAO1 were set to 38411040; 38196629 Phenotypes for gene: CIAO1 were set to Neuromuscular disease, CIAO1-related (MONDO:0019056) Penetrance for gene: CIAO1 were set to unknown Review for gene: CIAO1 was set to GREEN gene: CIAO1 was marked as current diagnostic Added comment: PMID:38196629 (note pre-print) describes 4 unrelated patients with core features of progressive muscle weakness, respiratory insufficiency, joint hyperlaxity, ankle tightness, calf pseudohypertrophy, elevated CK, and larning disabilities/difficulties. 2 patients presented with increased iron deposition in the brain. Age of recognition of myopathic symptoms varied from early childhood to adolescence. PMID: 38411040 reports 2 unrelated patients. Patient 1 was born with microcephaly and borderline hypertonia, and died at 18 months of respiratory failure from bronchiolitis. Patient 2 presented with failure to thrive, a hyperkinetic movement disorder, and autism before deteriorating in late teens with muscle weakness, recurrent pneuomonia with respiratory insufficiency, and eventually death due to multi-organ failure with carnificating pneumonia, septic cardiomyopathy, and intracranial hemorrhages. Immune deficiency was ruled out. All variants reported were homozygous or compound heterozygous missense variants, with the exception of one large in-frame deletion of exon 7. Cell line studies showed the variants resulted in reduced protein stability and downstream cellular defects which could be rescued by wild-type CIAO1. Sources: Literature |
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| Mendeliome v1.1585 | SNF8 |
Chern Lim gene: SNF8 was added gene: SNF8 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SNF8 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SNF8 were set to 38423010 Phenotypes for gene: SNF8 were set to Neurodevelopmental disorder (MONDO:0700092), SNF8-related Review for gene: SNF8 was set to GREEN gene: SNF8 was marked as current diagnostic Added comment: PMID: 38423010 - Nine individuals from six families presenting with a spectrum of neurodevelopmental/neurodegenerative features caused by bi-allelic variants in SNF8. In total, three putative LoF variants and four missense variants were identified. - The phenotypic spectrum included four individuals with severe developmental and epileptic encephalopathy, massive reduction of white matter, hypo-/aplasia of the corpus callosum, neurodevelopmental arrest, and early death. A second cohort shows a milder phenotype with intellectual disability, childhood-onset optic atrophy, or ataxia. All mildly affected individuals shared the same hypomorphic variant, c.304G>A (p.Val102Ile) as compound heterozygous. - Functional studies using fibroblasts derived from patients and zebrafish model showed LoF is the disease mech. Sources: Literature |
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| Mendeliome v1.1584 | SNUPN |
Suliman Khan gene: SNUPN was added gene: SNUPN was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SNUPN was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SNUPN were set to PMID: 38413582; PMID: 38366623 Phenotypes for gene: SNUPN were set to autosomal recessive limb-girdle muscular dystrophy MONDO:0015152 Review for gene: SNUPN was set to GREEN Added comment: PMID: 38413582: reported 18 children from 15 unrelated families with muscular phenotypes, including proximal upper limb weakness, distal upper and lower limb weakness, and myopathy (EMG) with elevated serum creatinine kinase level. Exome sequencing revealed nine hypomorphic biallelic variants in the SNUPN gene, predominantly clustered in the last coding exon. Functional studies showed that mutant SPN1 failed to oligomerize leading to cytoplasmic aggregation in patients’ primary fibroblasts. PMID: 38366623: reported five individuals from two unrelated families with limb-girdle muscular dystrophy. Sources: Literature |
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| Mendeliome v1.1580 | NIT1 |
Paul De Fazio gene: NIT1 was added gene: NIT1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: NIT1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: NIT1 were set to 38430071 Phenotypes for gene: NIT1 were set to Cerebrovascular disorder, NIT1-related (MONDO:0011057) Penetrance for gene: NIT1 were set to unknown gene: NIT1 was marked as current diagnostic Added comment: 5 unrelated families reported with recessively inherited cerebral small vessel disease had compound hetereozygous or homozygous variants in NIT1. 1 family (3 siblings) had p.(Ala68*) in trans with p.(Arg243Trp), the remaining 4 families (1 individual each) were all homozygous for p.(Arg243Trp). Patients presented in mid-adulthood with progressive movement disorders (e.g. dystonia, chorea, bradykinesia and tremor, gait disturbance, dysarthria) and had abnormal brain MRI findings (honeycomb appearance of the basal ganglia-thalamus complex, due to numerous strongly dilated PVS). 3 patients had non-lobar intracerebral hemorrhage. Slowly progressive cognitive decline was also a key feature. Metabolic analysis in urine confirmed loss of NIT1 enzymatic function. Note p.(Arg243Trp) has 1 homozygote in gnomAD v4, but permitted due to later presentation in reported patients. Sources: Literature |
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| Mendeliome v1.1576 | ZFX |
Zornitza Stark gene: ZFX was added gene: ZFX was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZFX was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: ZFX were set to 26350204; 26740508; 38325380 Phenotypes for gene: ZFX were set to Neurodevelopmental disorder, MONDO:0700092, ZFX-related Review for gene: ZFX was set to GREEN Added comment: A single ZFX variant has been associated with a neurodevelopmental disorder, that has a Rett syndrome-like phenotype disorder, in a 14 year old male. The ZFX variant was allelic with another X-linked variant in SHROOM4. These variants were inherited from the mother, who had random X inactivation pattern (PMID: 26740508). PMID: 38325380 reports 11 ZFX variants in 18 subjects from 16 unrelated families (14 males and 4 females) with an X-linked neurodevelopmental disorder with recurrent facial gestalt. Seven variants were truncating and the remaining were missense variants within the Zinc finger array. In the pedigree of family 6 (figure 3, PMID: 38325380), it was apparent that there were female carriers of the ZFX variant (GRCh38 chrX: 24229396A>G, c.2438A>G, p.Tyr774Cys) with hyperparathyroidism and two affected males and one affected female, with the neurodevelopmental disorder. It appeared that skewed X-inactivation in the female carriers was responsible for the different phenotypic features. The association between ZFX variants and a novel neurodevelopmental disorder, was further supported by functional studies showing altered transcriptional activity in missense variants and altered behavior in a zebrafish loss-of-function model. Sources: Literature |
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| Mendeliome v1.1506 | WDR44 |
Andrew Fennell gene: WDR44 was added gene: WDR44 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: WDR44 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: WDR44 were set to PMID: 38191484 Phenotypes for gene: WDR44 were set to Ciliopathy, MONDO:0005308, WDR44-related Review for gene: WDR44 was set to GREEN Added comment: 11 male patients with 6 missense and 1 nonsense variant in WDR44 displaying a wide range of cognitive impairment and variable congenital anomalies associated with primary cilium dysfunction. All patients had learning difficulties with 8 labelled as intellectually disabled (mild-moderate). Other clinical features included anomalies of craniofacial, musculoskeletal, brain, renal and cardiac development. WDR44 is a negative regulator of ciliogenesis. Increased binding is hypothesised to underlie the pathogenicity of WDR44 variants identified in this cohort. Functional data supported impaired ciliogenesis initiation in patient fibroblasts and a zebrafish model. A zebrafish model recapitulated the human phenotype when morphants expressed WDR44 L668S, D669N, S764F, G782C, H839R, and R733* variants. Of note, D648G or N840S did not recapitulate the phenotype in the zebrafish model. The studies supported a GoF mechanism, but the authors could not rule out that LoF of WDR44 contributes to the ciliopathy-like phenotype observed, because protein expression data was only available for a limited number of patients. Sources: Literature |
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| Mendeliome v1.1436 | MAP1LC3B2 |
Zornitza Stark gene: MAP1LC3B2 was added gene: MAP1LC3B2 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: MAP1LC3B2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MAP1LC3B2 were set to 35748970; 33310865 Phenotypes for gene: MAP1LC3B2 were set to Hereditary susceptibility to infection, MONDO:0015979, MAP1LC3B2 -related; Mollaret’s meningitis (recurrent lymphocytic meningitis) due to HSV2 Review for gene: MAP1LC3B2 was set to RED Added comment: PMID: 35748970 Affects CNS (resident cells and fibroblasts) Impaired autophagy induction after HSV2 infection - increased viral replication and apoptosis of patient fibroblasts. PMID: 33310865 one affected individual with heterozygous variant in MAP1LC3B2 (p.L109M) Sources: Expert Review |
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| Mendeliome v1.1408 | CEP192 |
Chern Lim gene: CEP192 was added gene: CEP192 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CEP192 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: CEP192 were set to 37981762 Phenotypes for gene: CEP192 were set to microcephaly, short stature, limb-extremity dysplasia, and reduced testicular size Review for gene: CEP192 was set to RED gene: CEP192 was marked as current diagnostic Added comment: PMID: 37981762: - In one family, chet missense p.His638Tyr and p.Asn1917Ser segregated with microcephaly, short stature, limb-extremity dysplasia, and reduced testicular size in two affected siblings. Both sibs also fulfilled dx for mosaic variegated aneuploidy (MVA) syndrome and have tetraploidy. - A lower but substantial proportion of MVA/tetraploidy cells was observed in II-1, II-2, and II-4 (who are het for one of the variants). - In the same family, each variants in heterozygous state segregated with infertility and/or reduced testicular size in the proband’s father and maternal uncle. - Variant screening of CEP192 coding regions performed for 1264 unrelated males with idiopathic infertility. - Asn1917Ser was also detected in three additional unrelated infertile males with reduced testicular volumes. - Two other missense and two synonymous variants were repeatedly detected in infertile males. - qPCR showed CEP192 expression was decreased in individuals with c.1912C>T His638Tyr, mini-gene assay showed that c.1912C>T His638Tyr led to the skipping of exon 14, predicted to result in NMD. - Epithelial cells cultured in vitro from patients with biallelic variants showed the number of cells arrested during the prophase increased because of the failure of spindle formation. - Embyronic mouse lethality in Cep192-/- (hom for His638Tyr), Cep192M/M (hom for Asn1917Ser) and Cep192-/M (chet). - Embryos of Cep192M/M mice had significant increase of MVA and tetraploidy cells. - Number of apoptotic cells increased in Cep192M/M embryos compared with that of Cep192+/+, similar result in Cep192-/- embryos. - Male mice with Cep192 heterozygous variants replicated infertility Conclusions: - Association of this gene with autosomal recessive disease has not been established. - Association of monoallelic variants in this gene with infertility is not well established: - Two variants with some supportive evidence from mouse model. Sources: Literature |
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| Mendeliome v1.1401 | PLA2G16 |
Lauren Rogers changed review comment from: 7 patients from 4 unrelated consanguineous families with homozygous loss of function PTC variants. Features: 4/7 metabolic features, 6/7 neurological/skeletal features, 3/7 Psychomotor retardation/intellectual disability, 5/7 demyelinating peripheral neuropathy. Null mouse and patient derived white adipose tissue showed enrichment of arachidonic acid-containing membrane phospholipids and a strong decrease in PPARγ. CRISPR–Cas9-mediated PLAAT3 inactivation in human adipose stem cells induced insulin resistance, altered adipocyte diferentiation with decreased lipid droplet formation and reduced the expression of adipogenic and mature adipocyte markers, including PPARγ. Sources: Literature; to: 7 patients from 4 unrelated consanguineous families with homozygous loss of function PTC variants. Features: 4/7 metabolic features, 6/7 neurological/skeletal features, 3/7 Psychomotor retardation/intellectual disability, 5/7 demyelinating peripheral neuropathy. Null mouse and patient derived white adipose tissue showed enrichment of arachidonic acid-containing membrane phospholipids and a strong decrease in PPARγ. CRISPR–Cas9-mediated PLAAT3 inactivation in human adipose stem cells induced insulin resistance, altered adipocyte differentiation with decreased lipid droplet formation and reduced the expression of adipogenic and mature adipocyte markers, including PPARγ. Sources: Literature |
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| Mendeliome v1.1401 | PLA2G16 |
Lauren Rogers gene: PLA2G16 was added gene: PLA2G16 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PLA2G16 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: PLA2G16 were set to PMID: 37919452 Phenotypes for gene: PLA2G16 were set to Lipodystrophy (MONDO:0006573) Review for gene: PLA2G16 was set to GREEN Added comment: 7 patients from 4 unrelated consanguineous families with homozygous loss of function PTC variants. Features: 4/7 metabolic features, 6/7 neurological/skeletal features, 3/7 Psychomotor retardation/intellectual disability, 5/7 demyelinating peripheral neuropathy. Null mouse and patient derived white adipose tissue showed enrichment of arachidonic acid-containing membrane phospholipids and a strong decrease in PPARγ. CRISPR–Cas9-mediated PLAAT3 inactivation in human adipose stem cells induced insulin resistance, altered adipocyte diferentiation with decreased lipid droplet formation and reduced the expression of adipogenic and mature adipocyte markers, including PPARγ. Sources: Literature |
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| Mendeliome v1.1380 | DOT1L |
Zornitza Stark gene: DOT1L was added gene: DOT1L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DOT1L was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DOT1L were set to 37827158 Phenotypes for gene: DOT1L were set to Neurodevelopmental disorder, MONDO:0700092, DOT1L-related Mode of pathogenicity for gene: DOT1L was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: DOT1L was set to GREEN Added comment: Nine individuals reported with seven de novo missense variants. All had DD/ID and variable patterns of associated congenital anomalies. Variants demonstrated to be GoF and lead to increased H3K79 methylation levels in flies and human cells. Sources: Literature |
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| Mendeliome v1.1330 | CASP2 |
Lisa Norbart gene: CASP2 was added gene: CASP2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CASP2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CASP2 were set to 37880421 Phenotypes for gene: CASP2 were set to neurodevelopmental disorder MONDO:0700092, CASP2-related Penetrance for gene: CASP2 were set to Complete Review for gene: CASP2 was set to GREEN gene: CASP2 was marked as current diagnostic Added comment: 7 patients from 5 families 4 families hom for PTCs, 1 family Chet for splice+PTC RNA studies done for the splice to indicate usage of two cryptic splice donor sites 5/5 have ID/dev delay 1/5 has seizures 2/5 hypotonia 3/5 lissencephaly (pachygyria and cortical thickening) Sources: Literature |
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| Mendeliome v1.1319 | PTPN4 |
Bryony Thompson changed review comment from: >3 unrelated probands and supporting mouse model PMID: 17953619 - knockout mouse model has impaired motor learning and cerebellar synaptic plasticity PMID: 25424712 - twins with a de novo whole gene deletion and a Rett-like neurodevelopmental disorder PMID: 30238967 - mosaic de novo variant (p.Leu72Ser) identified in a child with developmental delay, autistic features, hypotonia, increased immunoglobulin E and dental problems. Also supporting mouse assays demonstrating loss of protein expression in dendritic spines DOI: https://doi.org/10.1016/j.xhgg.2021.100033 - missense and truncating variants in six unrelated individuals with varying degrees of intellectual disability or developmental delay. 5 were able to undergo segregation analysis and found to be de novo. Sources: Literature; to: >3 unrelated probands and supporting mouse model PMID: 17953619 - knockout mouse model has impaired motor learning and cerebellar synaptic plasticity PMID: 25424712 - twins with a de novo whole gene deletion and a Rett-like neurodevelopmental disorder PMID: 30238967 - mosaic de novo variant (p.Leu72Ser) identified in a child with developmental delay, autistic features, hypotonia, increased immunoglobulin E and dental problems. Also supporting mouse assays demonstrating loss of protein expression in dendritic spines PMID: 34527963 - missense and truncating variants in six unrelated individuals with varying degrees of intellectual disability or developmental delay. 5 were able to undergo segregation analysis and found to be de novo. Sources: Literature |
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| Mendeliome v1.1296 | IRF1 | Zornitza Stark edited their review of gene: IRF1: Added comment: PMID 36736301: Two unrelated children with recurrent early-onset life-threatening mycobacterial diseases due to multiple mycobacteria (BCG, M. avium). Homozygous LoF vairiants with extensive supporting functional data.; Changed rating: GREEN; Changed publications: 36736301; Changed phenotypes: Inherited susceptibility to mycobacterial disease, MONDO:0019146, IRF1-related; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1287 | HMOX1 | Zornitza Stark edited their review of gene: HMOX1: Added comment: PMID:33066778 provides a third case in support of promoting HMOX1 to green rating. This third case is a boy born to nonconsanguineous parents who presented with early onset asplenia, recurrent infections, and associated flares with bone marrow histiocyte activation with worsening interstitial lung disease and joint pain. This boy harboured compound heterozygous variants (p.L89Sfs*24 and p.Ala88Profs*51).; Changed rating: GREEN; Changed publications: 21088618, 9884342, 20844238, 33066778 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1229 | CASP4 |
Zornitza Stark gene: CASP4 was added gene: CASP4 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: CASP4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CASP4 were set to 37647624 Phenotypes for gene: CASP4 were set to Hereditary susceptibility to infection, MONDO:0015979, CASP4-related; Susceptibility to meliodiosis Review for gene: CASP4 was set to RED Added comment: Single patient with severe disease secondary to B. pseudomallei requiring ECMO. Adjunctive IFN-γ administration as replacement for its failed induction by IL-18 promptly led to clearance of B. pseudomallei and subsequent weaning of support. Novel homozygous missense mutation in CASP4, at exon 7 c.1030C > T. Peripheral blood mononuclear cells (PBMC) of the patient and her parents showed reduced IFN-γ production, notably to IL-12 stimulation, and decreased IL-18 in response to LPS and increased IL-1B. Cloned cells show impacts on CASP4 activation and pyroptosis. Sources: Expert Review |
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| Mendeliome v1.1163 | GJA4 |
Zornitza Stark gene: GJA4 was added gene: GJA4 was added to Mendeliome. Sources: Expert Review somatic tags were added to gene: GJA4. Mode of inheritance for gene: GJA4 was set to Other Publications for gene: GJA4 were set to 33912852 Phenotypes for gene: GJA4 were set to Cavernous hemangioma, MONDO:0003155, GJA4-related Review for gene: GJA4 was set to GREEN Added comment: Recurrent somatic GJA4 c.121G>T (p.Gly41Cys) mutation as a driver of hepatic (n=12) and cutaneous (n=3) vascular malformations. Induced changes in cell morphology and activated serum/glucocorticoid-regulated kinase 1 (SGK1), a serine/threonine kinase known to regulate cell proliferation and apoptosis, via non-canonical activation, in lentiviral transduction of primary human endothelial cells. Sources: Expert Review |
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| Mendeliome v1.1156 | APOO |
Zornitza Stark edited their review of gene: APOO: Added comment: PMID: 37649161 1 family, 2 individuals (male & female) with same NMD variant c.532G>T (p.E178*), maternally inherited (mother unaffected). Both died before 18 months of age with partial agenesis of the corpus callosum, bilateral congenital cataract, hypothyroidism, and severe immune deficiencies. Other phenotypes included partial syndactyly of the 2nd and 3rd toes, wrinkled palm, and sole skin. Functional studies included site directed mutagenesis. This mutation resulted in a highly unstable and degradation prone MIC26 protein, yet the remaining minute amounts of mutant MIC26 correctly localized to mitochondria and interacted physically with other MICOS subunits. MIC26 KO cells expressing MIC26 harboring the respective APOO/MIC26 mutation showed mitochondria with perturbed cristae architecture and fragmented morphology resembling MIC26 KO cells.; Changed publications: 37649161; Changed phenotypes: Mitochondrial disease, MONDO:0044970, APOO-related, Developmental delay, Lactic acidosis, Muscle weakness, Hypotonia, Repetitive infections, Cognitive impairment, Autistic behaviour |
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| Mendeliome v1.1156 | RAB5C |
Rylee Peters changed review comment from: 12 individuals with nine different heterozygous de novo variants in RAB5C. 9 with missense, 1 inframe duplication and 2 stop-gains (clinically more severe). All has mild-severe ID, 4/12 have epilepsy, 6/12 have macrocephaly (more than 3 SD). Sources: Literature; to: 12 individuals with nine different heterozygous de novo variants in RAB5C. 9 with missense, 1 inframe duplication and 2 stop-gains (clinically more severe). All have mild-severe ID, 4/12 have epilepsy, 6/12 have macrocephaly (more than 3 SD). Sources: Literature |
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| Mendeliome v1.1152 | RAB5C |
Rylee Peters gene: RAB5C was added gene: RAB5C was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RAB5C was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RAB5C were set to PMID: 37552066 Phenotypes for gene: RAB5C were set to Neurodevelopmental disorder MONDO:0700092, RAB5C-related Penetrance for gene: RAB5C were set to Complete Review for gene: RAB5C was set to GREEN gene: RAB5C was marked as current diagnostic Added comment: 12 individuals with nine different heterozygous de novo variants in RAB5C. 9 with missense, 1 inframe duplication and 2 stop-gains (clinically more severe). All has mild-severe ID, 4/12 have epilepsy, 6/12 have macrocephaly (more than 3 SD). Sources: Literature |
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| Mendeliome v1.1108 | HNRNPC |
Zornitza Stark gene: HNRNPC was added gene: HNRNPC was added to Mendeliome. Sources: Literature Mode of inheritance for gene: HNRNPC was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: HNRNPC were set to 37541189 Phenotypes for gene: HNRNPC were set to Neurodevelopmental disorder (MONDO:0700092), HNRNPC-related Review for gene: HNRNPC was set to GREEN Added comment: 13 individuals with global developmental delay, intellectual disability, behavioral abnormalities, and subtle facial dysmorphology with heterozygous HNRNPC germline variants. Five had an identical in-frame deletion of nine amino acids in the extreme C terminus. Supportive functional data; haploinsufficiency is the mechanism. Sources: Literature |
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| Mendeliome v1.1071 | PHF5A |
Daniel Flanagan gene: PHF5A was added gene: PHF5A was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: PHF5A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PHF5A were set to PMID: 37422718 Phenotypes for gene: PHF5A were set to Neurodevelopmental disorder (MONDO#0700092), PHF5A-related Review for gene: PHF5A was set to GREEN Added comment: Nine subjects with congenital malformations, including hypospadias, growth abnormalities, and developmental delay who had de novo PHF5A variants. Prenatally, six subjects had intrauterine growth retardation. All subjects had motor and speech delay and developmental delay. Congenital abnormalities comprised hypospadias in three of four male subjects, and heart defects (3/9), inguinal hernia (3/9), and sacral dimple (3/9). Six of the nine subjects had short stature. Craniofacial dysmorphism is variable in the nine subjects, high forehead and preauricular skin tag(s) in five subjects. Sources: Expert list |
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| Mendeliome v1.1049 | LAMA3 |
Sangavi Sivagnanasundram changed review comment from: Zhou et al. (2023) - Two heterozygous nonsense variants identified in two individuals of the same family [p.Arg1126Ter and p.Gln1507Ter] that was shown to segregate in the family with reduced penetrance. The authors hypothesize that function of laminin 𝛼3 is altered as it changes its ability to form heterotrimeric laminins. In vivo functional study using CRISPR/Cas-9 mediated LAMA3 knockout mice. Results of the functional assay showed development of tricuspid valve and right ventricle abnormalities in the presence of a homozygous LoF variant in LAMA3.; to: Novel gene-disease association Zhou et al. (2023) - Two heterozygous nonsense variants identified in two individuals of the same family [p.Arg1126Ter and p.Gln1507Ter] that was shown to segregate in the family with reduced penetrance. The authors hypothesize that function of laminin 𝛼3 is altered as it changes its ability to form heterotrimeric laminins. In vivo functional study using CRISPR/Cas-9 mediated LAMA3 knockout mice. Results of the functional assay showed development of tricuspid valve and right ventricle abnormalities in the presence of a homozygous LoF variant in LAMA3. |
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| Mendeliome v1.1042 | KLK1 |
Zornitza Stark edited their review of gene: KLK1: Added comment: Association with PAH: PMID: 31727138 screening of the biobank - 12 individuals with genetic variant in KLK1 relevant to PAH (not all were found to be hereditary). Assay showed that carriers of variants in KLK1 are less clinically severe compared to those who carry variants in BMPR2. PMID: 17573418 Functional study using sensitive and specific type ELISAs to assay multiple panels of human tissue. KLK1 tissue was abundantly expressed in the pancreas and salivary gland and moderately expressed in the lungs. Reviewed by ClinGen Pulmonary Hypertension GCEP on 30/8/2022 with LIMITED evidence supporting gene-disease validity; Changed publications: 31727138, 17573418; Changed phenotypes: [Kallikrein, decreased urinary activity of] 615953, Pulmonary arterial hypertension MONDO:0015924; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted |
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| Mendeliome v1.1005 | NSUN6 | Chirag Patel changed review comment from: Sufficient evidence for upgrade; to: Drosophila KO showed locomotion defects and reduced learning ability. Sufficient evidence for upgrade | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.992 | ANO1 | Zornitza Stark edited their review of gene: ANO1: Added comment: PMID 37253099: screening analysis of Moyamoya disease (MMD) cohort revealed 8 individuals with variants in the ANO1 gene. Two families had the same rare variant p.Met658Val. The ANO1 rare variants were assessed using patch-clamp recordings, and the majority of variants, including ANO1 p.Met658Val, displayed increased sensitivity to intracellular Ca2+. Patients harboring these gain-of-function ANO1 variants had classic features of MMD, but also had aneurysm, stenosis, and/or occlusion in the posterior circulation. Amber rating due to somewhat conflicting segregation and functional data presented.; Changed publications: 37253099; Changed phenotypes: Intestinal dysmotility syndrome, MIM# 620045, Moyamoya disease, MONDO:0016820, ANO1 related | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.965 | SART3 |
Daniel Flanagan gene: SART3 was added gene: SART3 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: SART3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SART3 were set to PMID: 37296101 Phenotypes for gene: SART3 were set to Neurodevelopmental disorder (MONDO#0700092), SART3-related; 46,XY disorder of sex development (MONDO:0020040), SART3-related Review for gene: SART3 was set to GREEN Added comment: Nine individuals from six families presenting with intellectual disability, global developmental delay, a subset of brain anomalies, together with gonadal dysgenesis in 46,XY individuals. Additionally, two individuals had seizures and two had epileptiform activity reported on EEG. Human induced pluripotent stem cells carrying patient variants in SART3 show disruption to multiple signalling pathways, upregulation of spliceosome components and demonstrate aberrant gonadal and neuronal differentiation in vitro. Sources: Expert list |
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| Mendeliome v1.956 | RAB34 |
Sarah Pantaleo gene: RAB34 was added gene: RAB34 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RAB34 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RAB34 were set to PMID: 37384395 Phenotypes for gene: RAB34 were set to Clefting; corpus callosum; short bones; hypertelorism; polydactyly; cardiac defects; anorectal anomalies Penetrance for gene: RAB34 were set to Complete Review for gene: RAB34 was set to GREEN Added comment: Oral-facial-digital syndromes (OFDS) are a group of clinically and genetically heterogenous disorders characterised by defects in the development of the face and oral cavity along with digit anomalies. Pathogenic variants in >20 genes encoding ciliary proteins have been found to cause OFDS. Identified by WES biallelic missense variants in a novel disease-causing ciliary gene RAB34 in four individuals from three unrelated families (aided by GeneMatcher). Affected individuals presented a novel form of OFDS accompanied by cardiac, cerebral, skeletal (eg. Shortening of long bones), and anorectal defects. RAB34 encodes a member of the Lab GTPase superfamily and was recently identified as a key mediator of ciliary membrane formation. Protein products of pathogenic variants clustered near the RAB34 C-terminus exhibit a strong loss of function. Onset is prenatal (multiple developmental defects including short femur, polydactyly, heart malformations, kidney malformations, brain malformations), resulting in medical termination for three probands. In the fourth, the only one alive at birth, proband born at 39+5 weeks, normal growth parameters after pregnancy with polyhydramnios, corpus callosum agenesis and polydactyly. Respiratory distress at birth. All four probands presented typical features of ciliopathy disorders, overlapping with oral, facial and digital abnormalities. All with homozygous missense variants. All absent in gnomAD (in homozygous state). Sanger sequencing confirmed mode of inheritance. Sources: Literature |
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| Mendeliome v1.956 | RPH3A |
Lucy Spencer gene: RPH3A was added gene: RPH3A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RPH3A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RPH3A were set to 37403762; 29441694 Phenotypes for gene: RPH3A were set to Neurodevelopmental disorder (MONDO#0700092), RPH3A-related Review for gene: RPH3A was set to GREEN Added comment: PMID: 37403762- 6 patients with RPH3A variant. All 6 have ID, 4 have epilepsy, 2 with obesity, 1 with dysmorphic features. All 6 have missense variants, 3 shown to be de novo, the other 3 parents were not available for testing. I patient also had language and motor impairment, breathing issues and mixed hypo/hypertonia- he also had variants in CUL4B, PRKAG2, SCN4A, none of these genes cause seizures (which he had). Patch clamp studies on 2 of the missense showed they increased either the number of NMDA receptors on neuron membrane surface or increased their conductance. Study suggests that the variants interrupt the normal role of RPH3A activity at the synaptic NMDAR complex which is needed for the induction of synaptic plasticity and NMDAR-dependant behaviours Previously this gene was reported in PMID: 29441694- 1 girl with learning disabilities, tremors, ataxia, hyperglycemia and muscle fatigability. Chet for 2 RPH3A missense. Functional analysis showed strong and marginal impairment of protein binding for each variant. this is the only biallelic report currently. Sources: Literature |
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| Mendeliome v1.956 | MIR204 |
Chern Lim gene: MIR204 was added gene: MIR204 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MIR204 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MIR204 were set to 26056285; 37321975 Phenotypes for gene: MIR204 were set to Retinal dystrophy and iris coloboma with or without cataract (MIM#616722) Mode of pathogenicity for gene: MIR204 was set to Other Review for gene: MIR204 was set to GREEN gene: MIR204 was marked as current diagnostic Added comment: PMID: 26056285 - Bilateral coloboma and rod-cone dystrophy with or without cataract in nine individuals of a five-generation family. - Heterozygous n.37C>T segregates with the disease in all affected individuals. - Functional analysis including transcriptome analysis showed this variant resulted in significant alterations of miR-204 targeting capabilities. In vivo injection, in medaka fish (Oryzias latipes), of the mutated miR-204 caused a phenotype consistent with that observed in the family. - Authors suggested gain of function is the likely disease mechanism. PMID: 37321975 - Four members of a three-generation family with early-onset chorioretinal dystrophy, heterozygous for n.37C>T. - Additionally, four family members were shown to be affected by albinism resulting from biallelic pathogenic OCA2 variants. - Haplotype analysis excluded relatedness with the family reported in PMID: 26056285. - In silico analysis of the MIR204 n.37C>T variant reveals profound changes to its target mRNAs and suggests a gain-of-function mechanism of miR 204 variant. Sources: Literature |
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| Mendeliome v1.908 | PRSS8 |
Lucy Spencer gene: PRSS8 was added gene: PRSS8 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRSS8 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PRSS8 were set to 36715754 Phenotypes for gene: PRSS8 were set to ichthyosis MONDO:0019269, PRSS8-related Review for gene: PRSS8 was set to AMBER Added comment: PMID: 36715754 1 family with 3 affected sons with congenital ichthyosis, consanguineous parents. All 3 affected members are homozygous for a canonical splice in PRSS8, quantitative RT-PCR showed a significant reduction in normal PRSS8 transcript. A second family with 4 affected members (proband and 3 cousins) with ichthyosis (3 also had autism), also consanguineous. Only the proband was tested who is homozygous for a missense in PTSS8. However this patient also had a TAAR1 missense (no disease association, but the paper suggests this could be responsible for the autism phenotype- KO mice have abnormal learning behaviour). Sources: Literature |
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| Mendeliome v1.906 | UNC79 |
Krithika Murali gene: UNC79 was added gene: UNC79 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: UNC79 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: UNC79 were set to PMID:37183800 Phenotypes for gene: UNC79 were set to Neurodevelopmental disorderMONDO:0700092 Review for gene: UNC79 was set to AMBER Added comment: PMID:37183800 Bayat et al 2023 report 6 unrelated patients with heterozygous NMD-predicted LoF variants in UNC79 - x1 canonical splice site variant, x5 nonsense/frameshift. 5 were confirmed de novo, 1 not identified in mother - father unavailable for testing. All variants absent in gnomAD and v2 pLI score for UNC79 is 1. Patients with UNC79 variants were identified through GeneMatcher or an international network of Epilepsy and Genetics departments. x1 patient underwent duo exome sequencing, remaining had trio exome sequencing - no other causative variants identified. Phenotypic features included: - 4/6 autistic features - 5/6 patients mild-moderate ID - 4/6 behavioural issues (aggression, stereotypies) - 4/6 epilepsy (focal to bilateral tonic-clonic seizures) - 5/6 hypotonia unc79 knockdown drosophila flies exhibited significantly higher rate of seizure-like behaviour than controls. unc79 haploinsufficiency shown to lead to significant reduction in protein levels of both unc79 and unc80 in mouse brains. Unc79 haploinsufficiency associated with deficiency in hippocampal-dependent learning and memory in mice. Authors have reviewed their own evidence in relation to the gene-disease criteria detailed by Strande et al 2017 and note that their clinical and experimental data provides moderate-level evidence supporting the association between UNC79 and a neurodevelopment disorder including ASD. Amber association favoured due to clinical phenotypic range reported between affected individuals and their lack of specificity. Sources: Literature |
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| Mendeliome v1.837 | DNAH7 |
Chern Lim gene: DNAH7 was added gene: DNAH7 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DNAH7 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: DNAH7 were set to 34476482; 35543642 Phenotypes for gene: DNAH7 were set to non-syndromic male infertility due to sperm motility disorder (MONDO#0017173), DNAH7-related Review for gene: DNAH7 was set to GREEN gene: DNAH7 was marked as current diagnostic Added comment: PMID: 34476482 (Wei et al 2021): - Hom/chet missense DNAH7 variants in three unrelated infertile patients with idiopathic asthenozoospermia, presented with primary ciliary dyskinesia (PCD)-associated symptoms. - Functional studies showed expression of DNAH7 in the spermatozoa from the DNAH7-defective patients was significantly decreased. PMID: 35543642 (Gao et al 2022): - One proband with idiopathic asthenozoospermia, presented a history of PCD-like symptoms. Hom frameshift variant predicted to cause NMD, both parents are heterozygous. - Immunofluorescent staining showed DNAH7 signal significantly decreased or was even completely absent in the sperm from the investigated patient. Sources: Literature |
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| Mendeliome v1.807 | KDM5A |
Achchuthan Shanmugasundram gene: KDM5A was added gene: KDM5A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KDM5A was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: KDM5A were set to 21937992; 33350388 Phenotypes for gene: KDM5A were set to autism spectrum disorder, MONDO:0005258; intellectual disability, MONDO:0001071 Review for gene: KDM5A was set to GREEN Added comment: PMID:21937992 reported a family with recessive missense KDM5A variant presenting with an undefined developmental disorder characterised with intellectual disability and facial dysmorphisms. PMID:33350388 reported nine patients from seven unrelated families identified with variants in KDM5A, of which three unrelated patients harboured heterozygous variants, while six patients from four unrelated families had homozygous variants. These patients presented with autism spectrum disorder (ASD) and a spectrum of neurodevelopmental phenotypes including intellectual disability, lack of speech, developmental delay and motor impairment. In addition, loss of KDM5A has resulted in repetitive behaviors, sociability deficits, cognitive dysfunction, and abnormal dendritic morphogenesis in mice. This gene has already been associated with phenotype in Gene2Phenotype (biallelic inheritance with 'limited' rating), but not in OMIM. Sources: Literature |
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| Mendeliome v1.803 | ROBO1 |
Zornitza Stark edited their review of gene: ROBO1: Added comment: Association with ID: GREEN for bi-allelic variants: PMID:28286008 reported a boy with compound heterozygous variants that was presented with developmental delay in 13 months and had severe intellectual disability and hyperactivity at nine years of age. He was nonverbal and wheelchair dependent because of spastic diplegia and ataxia. PMID:30692597 reported a five year old boy identified with a homozygous ROBO1 variant who had combined pituitary hormone deficiency, psychomotor developmental delay, severe intellectual disability, sensorineural hearing loss, strabismus and characteristic facial features. PMID:35227688 reported eight patients including the boy reported in PMID:30692597. Of the other seven patients, three were presented with intellectual disability. Of these three patients, two harboured compound heterozygous and one harboured homozygous variants. PMID:35348658 reported a patient identified with monoallelic de novo variant (p.D422G) who presented with early-onset epileptic encephalopathy and had severe developmental delay.; Changed phenotypes: Congenital heart disease, Pituitary anomalies, Nystagmus 8, congenital, autosomal recessive, MIM# 257400, intellectual disability, MONDO:0001071 |
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| Mendeliome v1.768 | PKDCC | Zornitza Stark Phenotypes for gene: PKDCC were changed from Dysmorphism; shortening of extremities to Rhizomelic limb shortening with dysmorphic features, MIM# 618821 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.765 | PKDCC | Zornitza Stark reviewed gene: PKDCC: Rating: GREEN; Mode of pathogenicity: None; Publications: 36896672; Phenotypes: Rhizomelic limb shortening with dysmorphic features 618821; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.689 | LGR4 |
Elena Savva changed review comment from: PMID: 36538378 - hom canonical splice variant in an infant with failure to thrive, severe salt-wasting crises associated with isolated hypoaldosteronism, nail anomalies, short stature, and deafness. Multiple affected siblings but all deceased, two normal siblings found to be het or wildtype. Functional studies proved INFRAME exon 6 skipping, patients cell shad minimal protein. Conditional K/O mouse model showed reduced expression of Wnt target genes, adrenal hypoplasia and aberrant zonal differentiation gnomAD: no hom PTCs PMID: 32493844 - 6 patients with delayed puberty, supported by functional studies on mice displaying impaired Wnt/β-catenin signaling. Recurring missense p.G363C present in 4/6 families, but super common in the population (67 homozygotes).; to: PMID: 36538378 - hom canonical splice variant in an infant with failure to thrive, severe salt-wasting crises associated with isolated hypoaldosteronism, nail anomalies, short stature, and deafness. Multiple affected siblings but all deceased, two normal siblings found to be het or wildtype. Functional studies proved INFRAME exon 6 skipping, patients cell shad minimal protein. Conditional K/O mouse model showed reduced expression of Wnt target genes, adrenal hypoplasia and aberrant zonal differentiation gnomAD: no hom PTCs PMID: 32493844 - 6 patients with delayed puberty, supported by functional studies on mice displaying impaired Wnt/β-catenin signaling. Recurring missense p.G363C present in 4/6 families, but super common in the population (67 homozygotes). |
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| Mendeliome v1.689 | LGR4 |
Elena Savva edited their review of gene: LGR4: Added comment: PMID: 36538378 - hom canonical splice variant in an infant with failure to thrive, severe salt-wasting crises associated with isolated hypoaldosteronism, nail anomalies, short stature, and deafness. Multiple affected siblings but all deceased, two normal siblings found to be het or wildtype. Functional studies proved INFRAME exon 6 skipping, patients cell shad minimal protein. Conditional K/O mouse model showed reduced expression of Wnt target genes, adrenal hypoplasia and aberrant zonal differentiation gnomAD: no hom PTCs PMID: 32493844 - 6 patients with delayed puberty, supported by functional studies on mice displaying impaired Wnt/β-catenin signaling. Recurring missense p.G363C present in 4/6 families, but super common in the population (67 homozygotes).; Changed publications: PMID: 32493844, 36538378; Changed phenotypes: {Bone mineral density, low, susceptibility to} MIM#615311; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal |
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| Mendeliome v1.635 | MIR145 |
Lucy Spencer gene: MIR145 was added gene: MIR145 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MIR145 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: MIR145 were set to 36649075 Phenotypes for gene: MIR145 were set to multisystemic smooth muscle dysfunction syndrome (MONDO:0013452), MIR145-related Review for gene: MIR145 was set to RED Added comment: PMID: 36649075- a patient whose fetal ultrasound revealed polyhydramnios, enlarged abdomenand bladder, and prune belly syndrome. During infancy/childhood profound gastrointestinal dysmotility, cerebrovascular disease, and multiple strokes. Described as a multisystemic smooth muscle dysfunction syndrome. Patient was found to have a de novo SNP in MIR145 NR_029686.1:n.18C>A. The MIR145transcript is processed into two microRNAs, with the variant position at nucleotide 3 of miR-145-5p. Transfection of an siRNA against mutant miR145-5p induced a notable decrease in the expression of several cytoskeletal proteins including transgelin, calponin, and importantly, smooth muscle actin. Hybridization analysis and miR RNA-seq demonstrated a decrease in expression of miR145-5p in the presence of mutant miR145-5p. RNA-seq showed that the differentially expressed genes were substantially different between patient and control fibroblasts. Sources: Literature |
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| Mendeliome v1.601 | TRPC5 |
Hazel Phillimore gene: TRPC5 was added gene: TRPC5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TRPC5 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: TRPC5 were set to PMID: 36323681; 24817631; 23033978; 33504798; 28191890 Phenotypes for gene: TRPC5 were set to Intellectual disability; autistic spectrum disorder Review for gene: TRPC5 was set to AMBER Added comment: PMID: 36323681; Leitão E. et al. (2022) Nat Commun.13(1):6570: Missense variant NM_012471.2:c.523C>T, p.(Arg175Cys in three brothers with intellectual disability (ID) and autistic spectrum disorder (ASD), inherited from an asymptomatic mother and absent in the maternal grandparents. Whole cell patch clamp studies of HEK293 created by site-directed mutagenesis showed increased current of this calcium channel (constitutively opened). (This variant is absent in gnomAD v2.1.1). Also, the nonsense variant, c.965G> A, p.(Trp322*) was found in a high functioning ASD male (maternally inherited), NMD-predicted. Other papers and TRPC5 variants that were cited to associate this gene with X-linked ID and/or ASD include: PMID: 24817631; Mignon-Ravix, C. et al. (2014) Am. J.Med. Genet. A 164A: 1991–1997: A hemizygous 47-kb deletion in Xq23 including exon 1 of the TRPC5 gene. He had macrocephaly, delayed psychomotor development, speech delay, behavioural problems, and autistic features. Maternally inherited, and a family history compatible with X-linked inheritance (i.e., maternal great uncle was also affected, although not tested). In addition, PMID: 36323681; Leitão E. et al. (2022) cites papers with the variants p.(Pro667Thr), p.(Arg71Gln) and p.(Trp225*). NB. p.(Pro667Thr) is absent in gnomAD (v2.1.1), p.(Arg71Gln) is also absent (the alternative variant p.(Arg71Trp) is present once as heterozygous only). p.(Trp225*) is absent, and it should be noted that PTCs / LoF variants are very rare (pLI = 1). However, looking further into the three references, the evidence is not as clear or as accurate as was stated. The missense variant c.1999C>A, p.(Pro667Thr), was stated as de novo, but was actually maternally inherited but was still considered a candidate for severe intellectual disability (shown in the Appendix, Patient 93, with severe speech delay, autism spectrum disorder and Gilles de la Tourette). This patient also has a de novo MTF1 variant. Reference: PMID: 23033978; de Ligt, J. et al. (2012) N. Engl. J. Med. 367: 1921–1929). Missense variant (de novo): c.212G>A, p.(Arg71Gln), was found as part of the Deciphering Developmental Disorders (DDD) study and is shown in individual 164 in Supplementary Table 2 of PMID: 33504798; Martin, HC. et al. (2021) Nat. Commun.12: 627. Also displayed in DECIPHER (DDD research variant) with several phenotype traits, but ID and ASD are not specifically mentioned. Nonsense variant: c.674G>A. p.(Trp225*) was stated as de novo but was inherited (reference PMID: 28191890; Kosmicki, JA. et al. (2017) Nat. Genet. 49: 504–510. Supplement Table 7). This was a study of severe intellectual delay, developmental delay / autism. (NB. The de novo p.(Arg71Gln) variant from the DDD study is also listed (subject DDD 342 in Supplement 4 / Table 2). Sources: Literature |
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| Mendeliome v1.580 | CCIN |
Chern Lim gene: CCIN was added gene: CCIN was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CCIN was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CCIN were set to 36546111; 36527329 Phenotypes for gene: CCIN were set to Teratozoospermia Review for gene: CCIN was set to GREEN gene: CCIN was marked as current diagnostic Added comment: Two papers with three unrelated patients with teratozoospermia: PMID: 36546111 - Two families reported: One with homozygous missense (fam is consanguineous) and another with compound heterozygous missense + nonsense variants, patients suffering from teratozoospermia. - Homozygous CcinH42L/H42L and compound heterozygous CcinR432W/C447* knock-in mice generated. Spermatozoa from homozygous male mice exhibited abnormalities of sperm head shape revealed by Diff-Quick staining. When mated with WT mice, both homozygous CcinH42L/H42L and compound heterozygous CcinR432W/C447* male mice were infertile, whereas the mutant female mice could generate offspring and displayed no defects in fertility. PMID: 36527329 - One consanguineous family reported: homozygous missense, with asthenoteratozoospermia. - Transfected HEK cells showed reduced CCIN protein level. Sources: Literature |
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| Mendeliome v1.554 | SETD2 |
Zornitza Stark edited their review of gene: SETD2: Added comment: PMID 32710489: 12 unrelated patients, ranging from 1 month to 12 years of age, with a multisystemic neurodevelopmental disorder associated with a specific de novo heterozygous mutation in the SETD2 gene (R1740W). Key clinical features: severely impaired global development apparent from infancy, feeding difficulties with failure to thrive, small head circumference, and dysmorphic facial features. Affected individuals have impaired intellectual development and hypotonia; they do not achieve walking or meaningful speech. Other neurologic findings may include seizures, hearing loss, ophthalmologic defects, and brain imaging abnormalities. There is variable involvement of other organ systems, including skeletal, genitourinary, cardiac, and possibly endocrine. Further 3 unrelated patients identified with mild to moderately impaired intellectual development associated with a specific de novo heterozygous mutation in the SETD2 gene (R1740Q). These are distinct clinically from Luscan-Lumish syndrome, which is characterised by overgrowth.; Changed publications: 29681085, 32710489; Changed phenotypes: Luscan-Lumish syndrome, MIM#616831, Rabin-Pappas syndrome,MIM# 620155, Intellectual developmental disorder, autosomal dominant 70, MIM# 620157 |
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| Mendeliome v1.491 | KIF26A |
Chirag Patel gene: KIF26A was added gene: KIF26A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KIF26A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: KIF26A were set to PMID: 36228617 Phenotypes for gene: KIF26A were set to Congenital brain malformations, no OMIM # Review for gene: KIF26A was set to GREEN Added comment: 5 unrelated patients with biallelic loss-of-function variants in KIF26A (found through WES), exhibiting a spectrum of congenital brain malformations (schizencephaly, corpus callosum anomalies, polymicrgyria, and ventriculomegaly). Combining mice and human iPSC-derived organoid models, they discovered that loss of KIF26A causes excitatory neuron-specific defects in radial migration, localization, dendritic and axonal growth, and apoptosis, offering a convincing explanation of the disease etiology in patients. Single-cell RNA sequencing in KIF26A knockout organoids revealed transcriptional changes in MAPK, MYC, and E2F pathways. Sources: Literature |
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| Mendeliome v1.489 | PIGN |
Zornitza Stark edited their review of gene: PIGN: Added comment: Large cohort study of 21 new and review of 40 previously published cases in PMID 36322149 Biallelic-truncating variants were detected in 16 patients-10 with Fryns syndrome, 1 with MCAHS1, 2 with Fryns syndrome/MCAHS1, and 3 with neurologic phenotype. There was an increased risk of prenatal or neonatal death within this group (6 deaths were in utero or within 2 months of life; 6 pregnancies were terminated). Incidence of polyhydramnios, congenital anomalies (eg, diaphragmatic hernia), and dysmorphism was significantly increased. Biallelic missense or mixed genotype were reported in the remaining 45 cases-32 showed a neurologic phenotype and 12 had MCAHS1. No cases of diaphragmatic hernia or abdominal wall defects were seen in this group except patient 1 in which we found the missense variant p.Ser893Arg to result in functionally null alleles, suggesting the possibility of an undescribed functionally important region in the final exon.; Changed publications: 36322149; Changed phenotypes: Multiple congenital anomalies-hypotonia-seizures syndrome 1, MIM# 614080, MONDO:0013563, Fryns syndrome |
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| Mendeliome v1.474 | SPTBN5 |
Zornitza Stark edited their review of gene: SPTBN5: Added comment: Some of the missense variants are present at high population frequencies, not compatible with Mendelian disease. Gene is tolerant of LoF in gnomad, raising questions about the pathogenicity of the LoF variant. Commentaries questioning gene-disease relationship PMID: 36117916; 36238261; Changed rating: RED |
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| Mendeliome v1.463 | IRF2BP2 | Zornitza Stark edited their review of gene: IRF2BP2: Added comment: Reports of additional patients: 4yo with chronic diarrhea, severe eczema, anemia, failure to thrive, fevers, short stature, recurrent infections, cataracts, hypodontia, hypotrichosis alopecia, hypogammaglobulinemia. The 33-year-old male presented with recurrent respiratory infections since childhood, colitis and RA beginning at age 25 years.; Changed rating: GREEN; Changed publications: 27016798, 32048120, 36193988, 33864888; Changed phenotypes: Immunodeficiency, common variable, 14, MIM# 617765 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.346 | TRAF3 | Zornitza Stark edited their review of gene: TRAF3: Added comment: PMID 35960817: Nine individuals from five unrelated families with childhood-onset immune diseases and recurrent infections. All patients had suffered recurrent ear and sinopulmonary infections, including pneumonias from encapsulated bacteria Streptococcus pneumoniae and Haemophilus influenza, resulting in early-onset bronchiectasis in several individuals; Changed rating: GREEN; Changed publications: 20832341, 35960817; Changed phenotypes: Autoinflammatory syndrome, TRAF3-related, MONDO:0019751, hypergammaglobulinemia, lymphadenopathy, splenomegaly, Sjögren’s syndrome, {?Encephalopathy, acute, infection-induced (herpes-specific), susceptibility to, 5}, MIM# 614849 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.338 | AQP2 |
Zornitza Stark changed review comment from: Dominant disease is caused by variants exerting a dominant negative effect, whereas recessive disease is caused by bi-allelic loss of function variants.; to: Dominant disease is caused by variants exerting a dominant negative effect, whereas recessive disease is caused by bi-allelic loss of function variants. Onset in infancy. Causes severe dehydration, can be life-threatening. Treatment: hydration, low-salt, low-protein diet, thiazide diuretics, amiloride, indomethacin. Clinical trials. |
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| Mendeliome v1.338 | APRT |
Zornitza Stark changed review comment from: APRT deficiency is an autosomal recessive metabolic disorder that can lead to accumulation of the insoluble purine 2,8-dihydroxyadenine (DHA) in the kidney, which results in crystalluria and the formation of urinary stones. Clinical features include renal colic, hematuria, urinary tract infection, dysuria, and, in some cases, renal failure. The age at onset can range from 5 months to late adulthood; however, as many as 50% of APRT-deficient individuals may be asymptomatic.; to: APRT deficiency is an autosomal recessive metabolic disorder that can lead to accumulation of the insoluble purine 2,8-dihydroxyadenine (DHA) in the kidney, which results in crystalluria and the formation of urinary stones. Clinical features include renal colic, hematuria, urinary tract infection, dysuria, and, in some cases, renal failure. The age at onset can range from 5 months to late adulthood; however, as many as 50% of APRT-deficient individuals may be asymptomatic. Treatable: allopurinol or febuxostat, low purine diet. |
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| Mendeliome v1.338 | APRT | Zornitza Stark reviewed gene: APRT: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Adenine phosphoribosyltransferase deficiency MIM#614723; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.332 | PTPA |
Zornitza Stark gene: PTPA was added gene: PTPA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PTPA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PTPA were set to 36073231 Phenotypes for gene: PTPA were set to Intellectual disability, MONDO: 36073231, PTPA-related Review for gene: PTPA was set to AMBER Added comment: Biallelic PTPA pathogenic variants lead to a form of ID with later-onset parkinsonism based on 4 individuals from 2 families in the literature. Affected individuals were homozygous for missense variants demonstrated to result to reduced mRNA and protein levels as well as PP2A complex activation. Drosophila studies support an age-dependent locomotor dysfunction. Variants in other PP2A-complex-related genes also lead to NDDs. Summary provided below. There is currently no associated phenotype in OMIM, G2P, PanelApp UK or SysID. Consider inclusion in relevant panels (ID, Parkinsonism/movement disorders, etc) with amber rating pending further reports. ------ Fevga, Tesson et al (2022 - PMID: 36073231) describe the features of 4 individuals, from 2 unrelated families, with biallelic pathogenic PTPA variants. These presented with normal or delayed early milestones, learning disability and ID (mild to moderate) followed by progressive signs of parkinsonism (at the age of 11 yrs in 2 sibs, 15 yrs in another individual). Motor symptoms were responsive to levodopa and later to deep brain stimulation. Linkage analysis in one consanguineous family followed by exome revealed homozygosity for a missense PTPA variant (NM_178001:c.893T>G/p.Met298Arg). Exome sequencing in affected subjects from the 2nd family revealed homozygosity for a further missense variant (c.512C>A/p.Ala171Asp). There were no other candidate variants for the phenotype following parental / segregation studies. Role of the gene: As the authors discuss, PTPA (or PPP2R4) is ubiquitously expressed in all tissues incl. brain and encodes a phosphotyrosyl phosphatase activator of the dimeric form of protein phosphatase-2A (PP2A). PP2A in turn, is the major Ser/Thr phosphatase in brain targeting a large number of proteins involved in diverse functions. Activation of PP2A is dependent on its methylation, which is negatively regulated by the PP2A-specific methylesterase (PME-1). By binding to PME-1, PTPA counteracts the negative influence of the former on PP2A. Pathogenic variants in genes encoding subunits/regulators of the PP2A complex (e.g. PPP2R1A or PPP2CA) are associated with neurodevelopmental disorders. Variant studies: Upon overexpression of wt and both variants in a HEK-293 cell line the authors demonstrated that both variants resulted in significantly reduced mRNA and protein levels (which for Ala171Asp were attributed to increased proteasomal degradation). Both variants were shown to result in impaired PP2A complex activation compared to wt. Drosophila / animal models: Pan-neuronal RNAi-mediated knockdown of ptpa in Drosophila resulted in an age-dependent locomotor dysfunction, reversible with L-DOPA treatment. Previous studies in mice suggest cognitive/electrophysiological impairments upon downregulation of PP2A activity in transgenic mice. Sources: Literature |
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| Mendeliome v1.271 | LEF1 | Zornitza Stark edited their review of gene: LEF1: Added comment: Monoallelic variants in LEF1 reported in 11 affected individuals from 4 unrelated families, and a biallelic variant reported in an affected individual from a consanguineous family. The phenotypic spectrum included various limb malformations, such as radial ray defects, polydactyly or split hand/foot, and ectodermal dysplasia. Haploinsufficiency or loss of DNA binding postulated to be responsible for a mild to moderate phenotype, whereas loss of β-catenin binding caused by biallelic variants postulated to be associated with a severe phenotype.; Changed rating: GREEN; Changed publications: 32022899, 35583550; Changed phenotypes: Syndromic disease, MONDO:0002254, LEF1-related; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.247 | ZMYND8 |
Zornitza Stark gene: ZMYND8 was added gene: ZMYND8 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: ZMYND8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: ZMYND8 were set to 35916866; 32530565 Phenotypes for gene: ZMYND8 were set to Neurodevelopmental disorder, MONDO:0700092, ZMYND8-related; Delayed speech and language development; Motor delay; Intellectual disability; Abnormality of cardiovascular system morphology; Hearing abnormality; Abnormality of vision; Abnormality of the face; Seizures Review for gene: ZMYND8 was set to GREEN Added comment: Dias et al (2022 - PMID: 35916866) describe the phenotype of 11 unrelated individuals with monoallelic de novo (or suspected de novo) missense (N=9) or truncating (N=2) ZMYND8 variants. One of these subjects was previously reported by Suzuki et al (2020 - PMID: 32530565). Features included speech delay/language difficulties (9/11), motor delay (9/11), ID (in 10/11 - profound in 1, moderate in 2), CHD (7/11 - PDA, VSD, ASD, pulmonary stenosis, etc), hearing or vision impairment (7/11). Seizures were reported in few (in text 5/11, table 2/11). Variable non-familial facial features were present in (9/11). As the authors discuss, ZMYND8 encodes a multidomain protein playing a role in transcription regulation, chromatin remodeling, regulation of super enhancers, DNA damage response/tumor suppression. The protein is broadly expressed in brain and shows highest expression in early development. Molecular modeling and/or a yeast two-hybrid system were suggestive of disrupted interaction of ZMYND8 with Drebrin (missense variants in PWWP domain) or GATAD2A (variants in MYND domain). Neuronal Zmynd8 knockdown in Drosophila resulted in deficits in habituation learning. Sources: Expert Review |
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| Mendeliome v1.228 | OTULIN | Zornitza Stark edited their review of gene: OTULIN: Added comment: PMID 35587511: Multiple individuals reported with haploinsufficiency of OTULIN and severe staphylococcal disease, with life-threatening skin or pulmonary necrosis. Functional data.; Changed publications: 27523608, 27559085, 35587511; Changed phenotypes: Autoinflammation, panniculitis, and dermatosis syndrome, MIM# 617099, Susceptibility to infection with Staphylococcus aureus, Hereditary predisposition to infections, MONDO:0015979, OTULIN-related; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.204 | ADGRL1 |
Elena Savva gene: ADGRL1 was added gene: ADGRL1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ADGRL1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: ADGRL1 were set to PMID: 35907405 Phenotypes for gene: ADGRL1 were set to Neurodevelopmental disorder, ADGRL1-related (MONDO#0700092) Review for gene: ADGRL1 was set to GREEN Added comment: PMID: 35907405 - 9 patients w/ ADHD (3/9), autism (4/9), mild-moderate ID (5/9) and epilepsy (2/9) and facial dysmorphism (7/9). Variants include missense (4) and PTCs (5), and were either de novo (7/9) or inherited from parents with learning difficulties/ID (2/9). Functional studies on both PTCs and missense variants show significant reductions in calcium signalling and surface protein. Het null mouse model shows neurological and developmental abnormalities, with hom null mice non-viable. Sources: Literature |
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| Mendeliome v1.155 | KMT2B | Zornitza Stark edited their review of gene: KMT2B: Added comment: Nine individuals reported in PMID 33150406 with heterozygous variants in this gene and intellectual disability, speech delay, microcephaly, growth delay, feeding problems, and dysmorphic features, including epicanthic folds, posteriorly rotated ears, syndactyly/clinodactyly of toes, and fifth finger clinodactyly, normal MRIs and NO dystonia.; Changed publications: 27839873, 27992417, 33150406; Changed phenotypes: Dystonia 28, childhood-onset 617284, MONDO:0015004, Intellectual developmental disorder, autosomal dominant 68, MIM# 619934 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.102 | IFNAR2 | Zornitza Stark edited their review of gene: IFNAR2: Added comment: Five children from Greenland, Canada, and Alaska presenting with viral diseases, including life-threatening COVID-19 or influenza, in addition to meningoencephalitis and/or hemophagocytic lymphohistiocytosis following live-attenuated viral vaccination; Changed rating: GREEN; Changed publications: 26424569, 35442417 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.79 | GCH1 | Zornitza Stark Phenotypes for gene: GCH1 were changed from Hyperphenylalaninemia, BH4-deficient, B, MIM# 233910; Dystonia, DOPA-responsive, with or without hyperphenylalaninemia, MIM# 128230 to Hyperphenylalaninemia, BH4-deficient, B, MIM# 233910; Dystonia, DOPA-responsive, with or without hyperphenylalaninemia, MIM# 128230; Hereditary spastic paraplegia MONDO:0019064, GCH1-related | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.35 | GIMAP6 |
Elena Savva gene: GIMAP6 was added gene: GIMAP6 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: GIMAP6 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: GIMAP6 were set to PMID: 35551368; 33328581 Phenotypes for gene: GIMAP6 were set to Autophagy, immune competence and inflammation Review for gene: GIMAP6 was set to AMBER Added comment: PMID: 35551368, PMID: 33328581 - K/O mice show autophagy, redox regulation, and polyunsaturated fatty acid (PUFA)–containing lipids and die prematurely from microangiopathic glomerulosclerosis with immunodeficiency. - 2 unrelated families (3 patients) w/ a homozygous missense (p.Gly153Val) and nonsense (p.Trp86*). All unaffected siblings were heterozygous. Patient 1 (missense) presented with Coombs-positive hemolytic anemia, hepatosplenomegaly, Cranial MRI showed bilateral effusions, sulcal hyperintensity, and lateral parietal subcortical acute focal ischemic lesions. Patient 2 (nonsense) presented with recurrent purulent otitis media and a chronic wet cough, persistent jaundice, recurrent chest and ear infections, lingular consolidation, mild bronchiectasis, bibasilar bronchial wall thickening, right peribronchial consolidation, right lower lobe bronchiectasis, bilateral axillary lymphadenopathy, and splenomegaly. Patient 3 (nonsense) presented with suffered headaches, abdomen pain, mouth ulcers, and recurrent infections - Functional studies show patient 1 (missense) with reduced protein expression on western blot, and patient 2/3 (nonsense) with no protein expression. T cells of Pt 1 were similar to mouse K/O model (elevated basal LC3-II, reduced autophagic flux). gnomAD: 0 homozygous PTCs, but a very common canonical splice which is present in the non-canonical transcript Sources: Literature |
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| Mendeliome v1.3 | RDH11 | Zornitza Stark edited their review of gene: RDH11: Added comment: 2nd case reported: 1 Chinese patient with retinitis pigmentosa, juvenile cataracts, intellectual disability, and myopathy. Trio-based WES and whole genomic CNV detection found compound heterozygous variants in RDH11 (p.Leu313Pro and c.75-3C>A) with biparental inheritance. Variant c.75-3C>A was confirmed to be a splice-site mutation by cDNA sequencing. It caused exon 2 skipping, resulting in a frameshift mutation and premature translation termination (p.Lys26Serfs*38). They found mislocalization of RDH11 protein in muscle cells of the patient by using immunofluorescence staining. Retinol dehydrogenase 11 (RDH11) is an 11-cis-retinol dehydrogenase that has a well-characterized, albeit auxiliary role in the retinoid cycle. Diseases caused by mutations in the RDH11 gene are very rare, and only one affected family with eye and intelligence involvement has been reported.; Changed rating: AMBER; Changed publications: 24916380, 15634683, 30731079, 18326732, 34988992 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14719 | GAMT | Zornitza Stark Phenotypes for gene: GAMT were changed from to Cerebral creatine deficiency syndrome 2 MIM#612736; Disorders of creatinine metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14707 | GCH1 | Zornitza Stark Phenotypes for gene: GCH1 were changed from to Hyperphenylalaninemia, BH4-deficient, B, MIM# 233910; Dystonia, DOPA-responsive, with or without hyperphenylalaninemia, MIM# 128230 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14704 | GCK | Zornitza Stark Phenotypes for gene: GCK were changed from to Diabetes mellitus, noninsulin-dependent, late onset, AD (MIM#125853); Diabetes mellitus, permanent neonatal 1, AR (MIM#606176); Hyperinsulinemic hypoglycemia, familial, 3, AD (MIM#602485); MODY, type II, AD (MIM#125851) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14647 | GJA5 |
Chirag Patel commented on gene: GJA5: Gollob et al. (2006) presented evidence that tissue-specific mutations in the GJA5 gene may predispose the atria to fibrillation. They identified a heterozygous missense mutation in blood and cardiac tissue in patient with AF. They also found 3 heterozygous missense mutations in cardiac tissue only in 3 other patients, indicating a somatic source of the genetic defects Yang et al. (2010) identified a heterozygous nonsense mutationin a 64-year-old female patient who was diagnosed with paroxysmal AF at 32 years of age. The mutation was detected in 6 additional affected family members, but was not found in 6 unaffected family members or in 200 ethnically matched controls. Yang et al. (2010) identified 3 heterozygous missense mutations in 3 probands with AF. The mutations segregated with disease in all 3 families and were not found in 200 ethnically matched controls. Sun et al. (2013) identified a heterozygous missense mutation in a 42-year-old woman who had been diagnosed with AF at age 40 years. The mutation was also detected in her father, who had been diagnosed with lone AF at 41 years of age, but it was not found in unaffected family members, in 200 controls, or in the dbSNP database. Functional analysis demonstrated that the I75F mutant is unable to form functional gap junction channels and also impairs coupling when expressed with wildtype CX40 or CX43. |
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| Mendeliome v0.14592 | GCK | Chirag Patel reviewed gene: GCK: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 19790256; Phenotypes: Diabetes mellitus, noninsulin-dependent, late onset, AD (MIM#125853), Diabetes mellitus, permanent neonatal 1, AR (MIM#606176), Hyperinsulinemic hypoglycemia, familial, 3, AD (MIM#602485), MODY, type II, AD (MIM#125851); Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14588 | GCH1 | Chirag Patel reviewed gene: GCH1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 7874165, 11113234, 15753436, 9667588, 10987649, 32170445, 32278297, 32746945, 30314816; Phenotypes: Hyperphenylalaninemia, BH4-deficient, B, MIM# 233910, Dystonia, DOPA-responsive, with or without hyperphenylalaninemia, MIM# 128230; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14404 | PAH | Zornitza Stark Phenotypes for gene: PAH were changed from to Phenylketonuria MIM#261600; Disorders of phenylalanine or tyrosine metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.14291 | DSCAM |
Krithika Murali edited their review of gene: DSCAM: Added comment: No OMIM gene disease association. Variants predominantly identified from large cohort studies with limited phenotypic information. Associations with ID, ASD, Hirschsprung disease reported. One homozygous splice site variant reported with no parental phenotypes provided. PMID 34253863 Lim et al 2021 - 12 yo proband with severe autism spectrum disorder diagnosed age 3, de novo heterozygous c.2051 del p.(L684X) variant identified (absent from gnomAD). Skin fibroblast human iPSC cells generated from proband and healthy controls. Forebrain-like induced neuronal cells showed reduced mRNA expression for NMDA-R subunits. PMID 28600779 Monies et al 2017 - Homozygous splice site variant identified in proband from consanguineous Saudi family. Proband had growth restriction, microcephaly, developmental delay. Parental phenotype not provided. PMID 30095639 and PMID 23671607 - report association between DSCAM polymorphisms and Hirschsprung disease in Chinese and European populations. PMID 27824329 Wang et al 2016 - 2 denovo mutations in mixed ID/ASD cohort of 1,045; including comparison of previously published cases 6 LOF out of 4,998 cases. PMID 28191889 2 denovo LOF in 13,407 mixed ID/ASD cases plus 4 previosly published cases our ot 6158; conclude denovo LOF enriched in cases vs controls PMID 21904980; mouse model – het LOF mice show hydrocephalus, decreased motor function and impaired motor learning ability, Evidence for missense lacking currently; Changed publications: 34253863, 32807774, 28600779, 21904980, 28191889, 27824329, 30095639, 23671607 |
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| Mendeliome v0.13876 | APRT | Elena Savva Phenotypes for gene: APRT were changed from to Adenine phosphoribosyltransferase deficiency MIM#614723 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13872 | APRT | Elena Savva reviewed gene: APRT: Rating: GREEN; Mode of pathogenicity: None; Publications: PubMed: 3680503, 2227934, 7915931, 1353080; Phenotypes: Adenine phosphoribosyltransferase deficiency MIM#614723; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13653 | COL1A1 |
Ain Roesley changed review comment from: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985).; to: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) For skeletal phenotypes: The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985). |
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| Mendeliome v0.13653 | COL1A1 |
Ain Roesley changed review comment from: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667); to: COL1A1 is mostly associated with osteogenesis imperfecta however, substitutions of arginine by cysteine in the triple helical domain) have been reported in individuals w/classic EDS & aneurysm & dissection of large vessels (PMID: 20301422;20301667) The mild forms are usually caused by haploinsufficiency and result in a reduced amount of normal type I collagen, the severe and lethal forms result from dominant negative variants which produce structural defects in the collagen molecule (PMID:12362985). |
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| Mendeliome v0.13607 | HGD | Zornitza Stark Phenotypes for gene: HGD were changed from to Alkaptonuria MIM#203500; Disorders of phenylalanine or tyrosine metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.13401 | PHIP |
Zornitza Stark changed review comment from: Chung-Jansen syndrome (CHUJANS) is characterized by global developmental delay apparent from infancy, impaired intellectual development or learning difficulties, behavioral abnormalities, dysmorphic features, and obesity. More than 20 individuals reported.; to: Chung-Jansen syndrome (CHUJANS) is characterized by global developmental delay apparent from infancy, impaired intellectual development or learning difficulties, behavioural abnormalities, dysmorphic features, and obesity. More than 20 individuals reported. |
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| Mendeliome v0.13346 | PDYN | Zornitza Stark Added comment: Comment when marking as ready: The presence of some of these variants in the population is concerning. However, functional data also supports gene-disease association. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12922 | PTS | Zornitza Stark Phenotypes for gene: PTS were changed from to Hyperphenylalaninemia, BH4-deficient, A, MIM# 261640 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12920 | PTS | Zornitza Stark reviewed gene: PTS: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Hyperphenylalaninemia, BH4-deficient, A, MIM# 261640; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12598 | PAX6 | Zornitza Stark Phenotypes for gene: PAX6 were changed from to Coloboma of optic nerve - MIM# 120430; Coloboma, ocular - MIM#120200; Morning glory disc anomaly - MIM#120430; Aniridia - MIM#106210; Anterior segment dysgenesis 5, multiple subtypes - MIM#604229; Cataract with late-onset corneal dystrophy - MIM#106210; Foveal hypoplasia 1- MIM#136520; Keratitis - MIM#148190; Optic nerve hypoplasia - MIM#165550 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12573 | PAX6 | Krithika Murali reviewed gene: PAX6: Rating: GREEN; Mode of pathogenicity: None; Publications: 31700164, 30986449, 29930474, 22171686; Phenotypes: ?Coloboma of optic nerve - MIM# 120430, ?Coloboma, ocular - MIM#120200, ?Morning glory disc anomaly - MIM#120430, Aniridia - MIM#106210, Anterior segment dysgenesis 5, multiple subtypes - MIM#604229, Cataract with late-onset corneal dystrophy - MIM#106210, Foveal hypoplasia 1- MIM#136520, Keratitis - MIM#148190, Optic nerve hypoplasia - MIM#165550; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12449 | SLC30A8 | Zornitza Stark Phenotypes for gene: SLC30A8 were changed from to {Diabetes mellitus, noninsulin-dependent, susceptibility to}, MIM# 125853 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12445 | SLC30A8 | Zornitza Stark reviewed gene: SLC30A8: Rating: RED; Mode of pathogenicity: None; Publications: 17293876; Phenotypes: {Diabetes mellitus, noninsulin-dependent, susceptibility to}, MIM# 125853; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12381 | DVL2 |
Bryony Thompson gene: DVL2 was added gene: DVL2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DVL2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DVL2 were set to 35047859; 33599851; 30521570 Phenotypes for gene: DVL2 were set to Robinow syndrome MONDO:0019978 Review for gene: DVL2 was set to AMBER Added comment: A single case with Robinow syndrome identified with a de novo frameshift variant in the last exon of the gene (c.2105dupC, p.Pro703Serfs*103). Also, a canine DVL2 frameshift variant has been associated with a Robinow-like syndrome in dogs, contributing to the brachycephalic phenotype and caudal vertebral anomalies. Sources: Literature |
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| Mendeliome v0.12304 | AHCY | Elena Savva Phenotypes for gene: AHCY were changed from to Hypermethioninemia with deficiency of S-adenosylhomocysteine hydrolase, MIM#613752 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12152 | CASP8 |
Ain Roesley changed review comment from: Boderline red/amber 1 family (the 2nd family reported in PMID:25814141 was found to be distantly related to the one in PMID:12353035) Mice with targeted T cell and B cell caspase-8 deficiency present normal thymocyte development but a marked decrease in peripheral blood T-cells. Besides, when challenged with the lymphocytic choriomeningitis virus (LCMV), these animals showed a significantly impaired immune response to the infection that included impaired CD8 cell expansion and an abrogated ability to generate virus-specific CD8+ cytotoxic T-cells.; to: Borderline red/amber 1 family (the 2nd family reported in PMID:25814141 was found to be distantly related to the one in PMID:12353035) Mice with targeted T cell and B cell caspase-8 deficiency present normal thymocyte development but a marked decrease in peripheral blood T-cells. Besides, when challenged with the lymphocytic choriomeningitis virus (LCMV), these animals showed a significantly impaired immune response to the infection that included impaired CD8 cell expansion and an abrogated ability to generate virus-specific CD8+ cytotoxic T-cells. |
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| Mendeliome v0.12036 | SMARCE1 | Zornitza Stark Phenotypes for gene: SMARCE1 were changed from Coffin-Siris syndrome 5, MIM# 616938 to Coffin-Siris syndrome 5, MIM# 616938; {Meningioma, familial, susceptibility to} 607174 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12035 | SMARCE1 |
Zornitza Stark changed review comment from: Coffin-Siris syndrome is a rare congenital disorder characterized by delayed psychomotor development, intellectual disability, coarse facial features, and hypoplasia of the distal phalanges, particularly the fifth digit. Other features may also be observed, including congenital heart defects, hypoplasia of the corpus callosum, and poor overall growth with short stature and microcephaly. Accounts for ~2% of Coffin Siris syndrome.; to: Coffin-Siris syndrome is a rare congenital disorder characterized by delayed psychomotor development, intellectual disability, coarse facial features, and hypoplasia of the distal phalanges, particularly the fifth digit. Other features may also be observed, including congenital heart defects, hypoplasia of the corpus callosum, and poor overall growth with short stature and microcephaly. Accounts for ~2% of Coffin Siris syndrome. Germline LoF variants also linked to familial meningioma. |
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| Mendeliome v0.12035 | SMARCE1 | Zornitza Stark edited their review of gene: SMARCE1: Changed publications: 23377182, 22426308, 23906836, 23929686, 32732226, 32436246, 32410215, 34205270; Changed phenotypes: Coffin-Siris syndrome 5, MIM# 616938, {Meningioma, familial, susceptibility to} 607174 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.12028 | MAT1A | Zornitza Stark Phenotypes for gene: MAT1A were changed from to Hypermethioninemia, persistent, autosomal dominant, due to methionine adenosyltransferase I/III deficiency MIM#250850; Methionine adenosyltransferase deficiency, autosomal recessive MIM#250850; Disorders of the metabolism of sulphur amino acids | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11540 | NDUFAF4 |
Krithika Murali edited their review of gene: NDUFAF4: Added comment: 3 unrelated families reported with patient-specific functional evidence provided for each. PMID: 32949790 - report two siblings with facial dysmorphism and lactic acidosis diagnosed neonatally with subsequent fatal early encephalopathy with apneic episodes, irritability, central hypoventilation, liver involvement and hyperammonemia. Cerebral white matter anomalies reported in one patient and cardiomyopathy in the other. WES identified homozygous nonsense NDUFAF4 variants with absent NDUFAF4 expression in patient fibroblasts. OXPHOS assembly studies demonstrated almost undetectable levels of fully assembled complex I and complex I–containing supercomplexes and an abnormal accumulation of SCIII2IV1 supercomplexes. Morphologically, fibroblasts showed rounder mitochondria and a diminished degree of branching of the mitochondrial network. PMID: 28853723 - report one patient born at 38 weeks after IOL for IUGR. Presented age 7 months with developmental regression, growth failure and central hypotonia. Brain MRI revealed diffuse bilateral signal alterations in the basal ganglia and thalami and an EEG showed generalized slowing with multifocal spikes consistent with an epileptogenic focus. Homozygous missense NDUFAF4 variants identified. Lentiviral complementation of patient fibroblasts with wild-type NDUFAF4 rescued complex I deficiency and assembly defect PMID 18179882 - report multiple affected individuals from one family. Most presented soon after birth with severe metabolic acidosis and high plasma lactate levels. Patients who survived longer were repeatedly admitted because of exacerbation of the acidosis during intercurrent infections. One long-term survivor had profound ID.; Changed publications: 32949790, 28853723, 18179882 |
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| Mendeliome v0.11386 | ABCC8 | Elena Savva Phenotypes for gene: ABCC8 were changed from to Diabetes mellitus, noninsulin-dependent MIM#125853; Diabetes mellitus, permanent neonatal 3, with or without neurologic features MIM#618857; Diabetes mellitus, transient neonatal 2 MIM#610374; Hyperinsulinemic hypoglycemia, familial, 1 MIM#256450; Hypoglycemia of infancy, leucine-sensitive MIM#240800 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11384 | ABCC8 | Elena Savva reviewed gene: ABCC8: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 21054355, 32027066, 32376986; Phenotypes: Diabetes mellitus, noninsulin-dependent MIM#125853, Diabetes mellitus, permanent neonatal 3, with or without neurologic features MIM#618857, Diabetes mellitus, transient neonatal 2 MIM#610374, Hyperinsulinemic hypoglycemia, familial, 1 MIM#256450, Hypoglycemia of infancy, leucine-sensitive MIM#240800; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11169 | KYNU | Zornitza Stark Phenotypes for gene: KYNU were changed from to Hydroxykynureninuria MIM#236800; Vertebral, cardiac, renal, and limb defects syndrome 2 MIM#617661; Disorders of histidine, tryptophan or lysine metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11163 | JAG1 |
Zornitza Stark changed review comment from: Two unrelated families reported with CMT type 2. Affected individuals in both families exhibited severe vocal fold paresis, a rare feature of peripheral nerve disease that can be life-threatening. Studies of mutant protein posttranslational modification and localization indicated that the mutations (p.Ser577Arg, p.Ser650Pro) impair protein glycosylation and reduce JAG1 cell surface expression. Mice harboring heterozygous CMT2-associated mutations exhibited mild peripheral neuropathy, and homozygous expression resulted in embryonic lethality by midgestation. Pre-existing rat model. Sources: Literature; to: Association with Alagille is very well established. Two unrelated families reported with CMT type 2. Affected individuals in both families exhibited severe vocal fold paresis, a rare feature of peripheral nerve disease that can be life-threatening. Studies of mutant protein posttranslational modification and localization indicated that the mutations (p.Ser577Arg, p.Ser650Pro) impair protein glycosylation and reduce JAG1 cell surface expression. Mice harboring heterozygous CMT2-associated mutations exhibited mild peripheral neuropathy, and homozygous expression resulted in embryonic lethality by midgestation. Pre-existing rat model. Sources: Literature |
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| Mendeliome v0.11120 | QDPR | Zornitza Stark Phenotypes for gene: QDPR were changed from to Hyperphenylalaninemia, BH4-deficient, C, MIM# 261630 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11117 | QDPR | Zornitza Stark reviewed gene: QDPR: Rating: GREEN; Mode of pathogenicity: None; Publications: 11153907; Phenotypes: Hyperphenylalaninemia, BH4-deficient, C, MIM# 261630; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11071 | CDX2 | Chirag Patel edited their review of gene: CDX2: Added comment: 9 families, with heterozygous variants identified with WES, presenting with congenital abnormalities affecting the development of the anus, the renal and urogenital system, the vertebrae and/or the limbs in varying sequences and severity (incl. sirenomelia and persistent cloaca). A recurrent pathogenic missense variant in the HOX domain of the protein p.(Arg237His) was found in 3 unrelated families. In the mouse cdx2 is essential for anteroposterior patterning of embryonal axis and morphogenesis of cloacal structures. Cdx2 heterozygous conditional mutant mice show a variable phenotype (including imperforate anus, sirenomelia, posterior vertebral truncations, and bladder anomalies).; Changed rating: GREEN; Changed publications: PMID: 29177441, 34671974; Changed phenotypes: Congenital abnormalities of anus, renal and urogenital system, vertebrae and/or the limbs; Set current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11071 | CHKA |
Konstantinos Varvagiannis gene: CHKA was added gene: CHKA was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CHKA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CHKA were set to 35202461 Phenotypes for gene: CHKA were set to Abnormal muscle tone; Global developmental delay; Intellectual disability; Seizures; Microcephaly; Abnormality of movement; Abnormality of nervous system morphology; Short stature Penetrance for gene: CHKA were set to Complete Review for gene: CHKA was set to GREEN Added comment: Klöckner (2022 - PMID: 35202461) describe the phenotype of 6 individuals (from 5 unrelated families) harboring biallelic CHKA variants. Shared features incl. abnormal muscle tone(6/6 - hypertonia or hypotonia, 3/6 each), DD/ID (6/6,severe in 4, severe/profound in 2), epilepsy (6/6 - onset: infancy - 3y2m | epileptic spasms or GS at onset), microcephaly (6/6), movement disorders (3/6 - incl. dyskinesia, rigidity, choreoatetotic movements). 2/5 individuals exhibited MRI abnormalities, notably hypomyelination. Short stature was observed in 4/6. Eventual previous genetic testing was not discussed. Exome sequencing (quattro ES for 2 sibs, trio ES for 1 individual, singleton for 3 probands) revealed biallelic CHKA variants in all affected individuals. Sanger sequencing was performed for confirmation and segregation studies. Other variants (in suppl.) were not deemed to be causative for the neurodevelopmental phenotype. 3 different missense, 1 start-loss and 1 truncating variant were identified, namely (NM_0012772.2): - c.421C>T/p.(Arg141Trp) [3 hmz subjects from 2 consanguineous families], - c.580C>T/p.Pro194Ser [1 hmz individual born to consanguineous parents], - c.2T>C/p.(Met1?) [1 hmz individual born to related parents], - c.14dup/p.(Cys6Leufs*19) in trans with c.1021T>C/p.(Phe341Leu) in 1 individual. CHKA encodes choline kinase alpha, an enzyme catalyzing the first step of phospholipid synthesis in the Kennedy pathway. The pathway is involved in de novo synthesis of glycerophospholipids, phosphatidylcholine and phosphatidylethanolamine being the most abundant in eukaryotic membranes. CHKA with its paralog (CHKB) phosphorylates either choline or ethanolamine to phosphocholine or phosphoethanolamine respectively with conversion of ATP to ADP. As the authors comment, biallelic pathogenic variants in CHKB cause a NDD with muscular dystrophy, hypotonia, ID, microcephaly and structural mitochondrial anomalies (MIM 602541). [Prominent mitochondrial patterning was observed in a single muscle biopsy available from an individual with biallelic CHKA variants]. Other disorders of the Kennedy pathway (due to biallelic PCYT2, SELENOI, PCYT1A variants) present with overlapping features incl. variable DD/ID (no-severe), microcephaly, seizures, visual impairment etc. CHKA variants were either absent or observed once in gnomAD, affected highly conserved AAs with multiple in silico predictions in favor of a deleterious effect. In silico modeling suggests structural effects for several of the missense variants (Arg141Trp, Pro194Ser presumably affect ADP binding, Phe341 lying close to the binding site of phosphocholine). Each of the missense variants was expressed in yeast cells and W. Blot suggested expression at the expected molecular weight at comparative levels. The 3 aforementioned variants exhibited reduced catalytic activity (20%, 15%, 50% respectively). NMD is thought to underly the deleterious effect of the frameshift one (not studied). The start-loss variant is expected to result in significantly impaired expression and protein function as eventual utilization of the next possible start codon - occurring at position 123 - would remove 26% of the protein. Chka(-/-) is embryonically lethal in mice, suggesting that complete loss is not compatible with life. Reduction of choline kinase activity by 30% in heterozygous mice did not appear to result in behavioral abnormalities although this was not studied in detail (PMID cited: 18029352). Finally, screening of 1566 mouse lines identified 198 genes whose disruption yields neuroanatomical phenotypes, Chka(+/-) mice being among these (PMID cited: 31371714). There is no associated phenotype in OMIM, Gene2Phenotype or SysID. Overall this gene can be considered for inclusion in the ID and epilepsy panes with green or amber rating (>3 individuals, >3 variants, variant studies, overlapping phenotype of disorders belonging to the same pathway, etc). Consider also inclusion in the microcephaly panel (where available this seemed to be of postnatal onset). Sources: Literature |
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| Mendeliome v0.11028 | MAPK8IP1 | Zornitza Stark Phenotypes for gene: MAPK8IP1 were changed from to Susceptibility to diabetes mellitus, noninsulin-dependent MIM#125853 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.11004 | MAPK8IP1 | Paul De Fazio reviewed gene: MAPK8IP1: Rating: RED; Mode of pathogenicity: None; Publications: 10700186; Phenotypes: Susceptibility to diabetes mellitus, noninsulin-dependent MIM#125853; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10969 | FLAD1 | Zornitza Stark Phenotypes for gene: FLAD1 were changed from to Lipid storage myopathy due to flavin adenine dinucleotide synthetase deficiency MIM#255100 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10953 | FLAD1 | Ain Roesley reviewed gene: FLAD1: Rating: GREEN; Mode of pathogenicity: None; Publications: 34454814, 34718578, 31392824, 30982706, 30311138, 30427553, 28433476, 27259049, 25058219; Phenotypes: Lipid storage myopathy due to flavin adenine dinucleotide synthetase deficiency MIM#255100; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10953 | ZFYVE26 |
Ain Roesley changed review comment from: Genereviews: >70 individuals reported; to: Genereviews: >70 individuals reported. While onset of spasticity is typically in mid- to late childhood or adolescence (i.e., between ages 5 and 18 years), other manifestations, such as developmental delay or learning disability, may be present earlier, often preceding motor involvement. Individuals with adult onset have also been reported. |
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| Mendeliome v0.10695 | SYN1 | Zornitza Stark Phenotypes for gene: SYN1 were changed from to Epilepsy, X-linked, with variable learning disabilities and behaviour disorders, MIM# 300491; Intellectual developmental disorder, X-linked 50, MIM# 300115 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10692 | SYN1 | Zornitza Stark reviewed gene: SYN1: Rating: GREEN; Mode of pathogenicity: None; Publications: 14985377, 21441247, 28973667, 21441247, 34243774; Phenotypes: Epilepsy, X-linked, with variable learning disabilities and behaviour disorders, MIM# 300491, Intellectual developmental disorder, X-linked 50, MIM# 300115; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10669 | CAPN10 | Zornitza Stark Phenotypes for gene: CAPN10 were changed from to {Diabetes mellitus, noninsulin-dependent 1} 601283 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10633 | DLX5 |
Zornitza Stark changed review comment from: A homozygous missense mutation (Q178P) was identified in 2 affected sisters from a consanguineous Yemeni family with split-hand/foot malformation and hearing loss, who had no detectable chromosomal aberration, Shamseldin et al. (2012). A heterozygosity missense mutation (Q186H) was identified in a 31-year-old Chinese woman with SHFM, Wang et al. (2014). A heterozygosity nonsense mutationIn (E39X) was identified in the probands from 2 unrelated Polish families with isolated SHFM, Sowinska-Seidler et al. (2014). Animal model evidence - mouse; to: A homozygous missense mutation (Q178P) was identified in 2 affected sisters from a consanguineous Yemeni family with split-hand/foot malformation and hearing loss, who had no detectable chromosomal aberration, Shamseldin et al. (2012). A heterozygosity missense mutation (Q186H) was identified in a 31-year-old Chinese woman with SHFM, Wang et al. (2014). A heterozygosity nonsense mutationIn (E39X) was identified in the probands from 2 unrelated Polish families with isolated SHFM, Sowinska-Seidler et al. (2014). Animal model evidence - mouse Green for mono-allelic, Amber for bi-allelic. |
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| Mendeliome v0.10577 | TLR8 | Zornitza Stark edited their review of gene: TLR8: Added comment: PMID 34981838: Monozygotic male twins, hemizygous for the G572V (maternally inherited), who suffer from severe autoimmune haemolytic anemia (AIHA) worsening with infections, and autoinflammation presenting as fevers, enteritis, arthritis and CNS vasculitis. Functional showed variant causes impaired stability of the TLR8 protein, cross-reactivity to TLR7 ligands and reduced ability of TLR8 to attenuate TLR7 signaling.; Changed publications: 33512449, 34981838; Changed phenotypes: Immunodeficiency, bone marrow failure, Autoinflammatory syndrome MONDO:0019751 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10564 | PRDM13 | Zornitza Stark Added comment: Comment when marking as ready: Bi-allelic variants: Recessive disease causing ID and DSD described in three reportedly unrelated families (2 consanguineous), but all are from Malta, and all share the same 13bp deletion spanning an exon-intron boundary. Mouse KO is embryonically lethal, and tissue specific KO failed to replicate many of the patients phenotypes, other than hypoplasia of the cerebellar vermis and hemispheres at P21. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10561 | ATP5G3 |
Naomi Baker edited their review of gene: ATP5G3: Added comment: Note that HGNC approved gene name is ATP5MC3. PMID: 34636445 reports a missense variant identified in a large single-family pedigree with dystonia and spastic paraplegia. The variant was identified via exome sequencing of the proband and a distant cousin, focussing on variants within the previously determined linkage region. The identical missense variant was also identified in a patient with childhood onset dystonic syndrome and was shown to be de novo. Functional studies of fibroblast cell lines from affected father (HSP) and proband of large family demonstrated decreased complex V function. A drosophila model containing the missense variant had reduced mobility and reduced complex V activity. PMID: 34954817 reports de novo monoallelic missense variants in three individuals, however one of these individuals was reported in above paper. The other two patients were: (1) a-15-year-old girl with milestone delay, pyramidal signs, and generalized dystonia with prominent upper-body involvement, and (2) a 6-year-old boy with delayed psychomotor development, lower-extremity spasticity, and elevated blood lactate levels; Changed rating: GREEN; Changed publications: PMID: 34636445, 34954817 |
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| Mendeliome v0.10377 | ASL | Zornitza Stark Phenotypes for gene: ASL were changed from to Argininosuccinic aciduria MIM#207900; Urea cycle disorders and inherited hyperammonaemias; disorder of amino acid metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10375 | ARG1 | Zornitza Stark Phenotypes for gene: ARG1 were changed from to Argininaemia MIM#207800; Urea cycle disorders and inherited hyperammonaemias; disorder of arginine metabolism | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10359 | CSTF2 |
Zornitza Stark gene: CSTF2 was added gene: CSTF2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CSTF2 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: CSTF2 were set to 32816001 Phenotypes for gene: CSTF2 were set to Intellectual disability Review for gene: CSTF2 was set to AMBER Added comment: Four individuals from a single family, spanning two generations, segregating a missense variant. Functional data, including a mouse model and a gene reporter assay. Sources: Literature |
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| Mendeliome v0.10068 | TMEM260 | Zornitza Stark changed review comment from: Seven unrelated families reported.; to: Seven unrelated families reported. Clinical features: ventricular septal defects (12/12), mostly secondary to truncus arteriosus (10/12), elevated creatinine levels (6/12), horse-shoe kidneys (1/12) and renal cysts (1/12) in patients. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10044 | ECM1 |
Zornitza Stark changed review comment from: PMID: 11929856 - Hamada et al 2002 - looked at 6 different unrelated consanguineous families (from Saudi Arabia, Kuwait, Pakistan, The Netherlands, UK, and a group of South African families with a probable common ancestor) with a clinical diagnosis of Lipoid proteinosis (LP)/Urbach–Wiethe disease. They performed a genome-wide linkage analysis and identified a region and then looked at the expression of candidate genes in fibroblasts from patients compared to controls. ECM1 was found to have lower expression levels. 6 homozygous deletion variants were identified in the patients. In one family they established that the parents were heterozygous for the variant. PMID: 28720532 - Afifi et al 2017 - studied 12 patients from 10 unrelated consanguineous Egyptian families with a clinical diagnosis of lipoid proteinosis. The patients reported progressive hoarseness of voice and easily damaged skin by minor trauma or friction. Homozygous ECM1 variants were detected in affected members in all families: 1 family had a missense variant, 5 families had splice site variants and 4 families had indels predicted to cause frameshifts. Parents were found to be heterozygous for the variants. PMID: 33159951 - Zhu et al 2021 - a novel homozygous three-nucleotide duplication (c.506_508dupCTG) in ECM in two siblings affected with LP from a consanguineous Chinese family.; to: Lipoid proteinosis of Urbach and Wiethe is a rare autosomal recessive disorder typified by generalized thickening of skin, mucosae, and certain viscera. Classic features include beaded eyelid papules and laryngeal infiltration leading to hoarseness. The disorder is clinically heterogeneous, with affected individuals displaying differing degrees of skin scarring and infiltration, variable signs of hoarseness and respiratory distress, and in some cases neurologic abnormalities such as temporal lobe epilepsy. Histologically, there is widespread deposition of hyaline (glycoprotein) material and disruption/reduplication of basement membrane PMID: 11929856 - Hamada et al 2002 - looked at 6 different unrelated consanguineous families (from Saudi Arabia, Kuwait, Pakistan, The Netherlands, UK, and a group of South African families with a probable common ancestor) with a clinical diagnosis of Lipoid proteinosis (LP)/Urbach–Wiethe disease. They performed a genome-wide linkage analysis and identified a region and then looked at the expression of candidate genes in fibroblasts from patients compared to controls. ECM1 was found to have lower expression levels. 6 homozygous deletion variants were identified in the patients. In one family they established that the parents were heterozygous for the variant. PMID: 28720532 - Afifi et al 2017 - studied 12 patients from 10 unrelated consanguineous Egyptian families with a clinical diagnosis of lipoid proteinosis. The patients reported progressive hoarseness of voice and easily damaged skin by minor trauma or friction. Homozygous ECM1 variants were detected in affected members in all families: 1 family had a missense variant, 5 families had splice site variants and 4 families had indels predicted to cause frameshifts. Parents were found to be heterozygous for the variants. PMID: 33159951 - Zhu et al 2021 - a novel homozygous three-nucleotide duplication (c.506_508dupCTG) in ECM in two siblings affected with LP from a consanguineous Chinese family. |
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| Mendeliome v0.10041 | SMPX | Zornitza Stark edited their review of gene: SMPX: Added comment: PMID 33974137: Four different missense variants were identified in ten patients from nine families in five different countries. Haplotype analysis of patients with similar ancestry revealed two different founder mutations in Southern Europe and France, indicating that the prevalence in these populations may be higher. Clinical features: adult-onset, usually distal more than proximal limb muscle weakness, slowly progressing over decades with preserved walking. Lower limb muscle imaging showed a characteristic pattern of muscle involvement and fatty degeneration. Histopathological and electron microscopic analysis of patient muscle biopsies revealed myopathic findings with rimmed vacuoles and the presence of sarcoplasmic inclusions, some with amyloid-like characteristics. In silico predictions and subsequent cell culture studies showed that the missense mutations increase aggregation propensity of the SMPX protein. In cell culture studies, overexpressed SMPX localized to stress granules and slowed down their clearance.; Changed publications: 21549342, 21549336, 21893181, 22911656, 28542515, 33974137; Changed phenotypes: Deafness, X-linked 4, MIM# 300066, Distal myopathy, adult-onset | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10024 | OGDHL |
Melanie Marty gene: OGDHL was added gene: OGDHL was added to Mendeliome. Sources: Literature Mode of inheritance for gene: OGDHL was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: OGDHL were set to PMID: 34800363 Phenotypes for gene: OGDHL were set to Neurodevelopmental disorder featuring epilepsy, hearing loss, visual impairment, and ataxia Review for gene: OGDHL was set to GREEN Added comment: Nine individuals from eight unrelated families carrying bi-allelic variants in OGDHL with a range of neurological and neurodevelopmental phenotypes including epilepsy, hearing loss, visual impairment, gait ataxia, microcephaly, and hypoplastic corpus callosum. Homozygous and compound heterozygous variants reported. Variant types reported include missense, PTCs and a synonymous variant that was shown to affect splicing. Functional studies with a CRISPR-Cas9-mediated tissue knockout with cDNA rescue system showed that the missense variants result in loss-of-function. Sources: Literature |
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| Mendeliome v0.10017 | FAAH2 |
Ain Roesley changed review comment from: PMID: 34645488; - 1x nonsense variant inherited from normal mother - proband presented with a classical Zellweger syndrome phenotype including global developmental delay, seizure disorder, severe hypotonia, failure to thrive, adrenal insufficiency and elevated very long-chain fatty acids and liver enzymes - this variant has 2 hemizygotes in gnomAD PMID: 25885783; - 1x missense inherited from normal mother and absent in normal brother - presented with autistic features, anxiety, pseudoseizures, ataxia, supranuclear gaze palsy, and isolated learning disabilities - biochemical studies on patient fibroblasts confirmed a defect in FAAH2 activity resulting in altered levels of endocannabinoid metabolites. - BUT this variant has 30 hemizygotes in gnomoad Sources: Literature; to: PMID: 34645488; - 1x nonsense variant inherited from normal mother - proband presented with a classical Zellweger syndrome phenotype including global developmental delay, seizure disorder, severe hypotonia, failure to thrive, adrenal insufficiency and elevated very long-chain fatty acids and liver enzymes - this variant has 2 hemizygotes in gnomAD PMID: 25885783; - 1x missense inherited from normal mother and absent in normal brother - presented with autistic features, anxiety, pseudoseizures, ataxia, supranuclear gaze palsy, and isolated learning disabilities - biochemical studies on patient fibroblasts confirmed a defect in FAAH2 activity resulting in altered levels of endocannabinoid metabolites. - BUT this variant has 30 hemizygotes in gnomAD Sources: Literature |
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| Mendeliome v0.10017 | FAAH2 |
Ain Roesley gene: FAAH2 was added gene: FAAH2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FAAH2 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: FAAH2 were set to PMID: 34645488 Penetrance for gene: FAAH2 were set to unknown Review for gene: FAAH2 was set to RED gene: FAAH2 was marked as current diagnostic Added comment: PMID: 34645488; - 1x nonsense variant inherited from normal mother - proband presented with a classical Zellweger syndrome phenotype including global developmental delay, seizure disorder, severe hypotonia, failure to thrive, adrenal insufficiency and elevated very long-chain fatty acids and liver enzymes - this variant has 2 hemizygotes in gnomAD PMID: 25885783; - 1x missense inherited from normal mother and absent in normal brother - presented with autistic features, anxiety, pseudoseizures, ataxia, supranuclear gaze palsy, and isolated learning disabilities - biochemical studies on patient fibroblasts confirmed a defect in FAAH2 activity resulting in altered levels of endocannabinoid metabolites. - BUT this variant has 30 hemizygotes in gnomoad Sources: Literature |
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| Mendeliome v0.9776 | NEBL | Bryony Thompson Added comment: Comment on list classification: Limited gene-disease vailidity, Classification - 09/25/2020 by ClinGen Dilated Cardiomyopathy GCEP. Evidence Summary: NEBL was evaluated for autosomal dominant dilated cardiomyopathy (DCM). Human genetic evidence supporting this gene-disease relationship includes case-level data. Arimura and colleagues (2000, PMID: 11140941) analyzed 83 DCM patients and 311 healthy controls, identifying 4 missense variants of unknown significance (VUSs) in 4 DCM cases. High minor allele frequencies (MAFs) and lack of segregation excluded these variants as evidence. Purevjav and colleagues (2010, PMID: 20951326) investigated a total of 260 DCM patients and 300 unrelated ethnic matched controls by direct DNA sequencing. Authors identified 4 missense VUSs. One of these variants (Q128R) was downgraded in level of evidence due to the lack of segregation. The other 3 variants were not scored because of their MAF. Perrot and colleagues (2016, PMID: 27186169) investigated a total of 389 patients with DCM, HCM, or LVNC, 320 Caucasian sex-matched controls and 192 Caucasian sex-matched blood donors and identified 3 missense VUSs in 4 families. One of these variants was also carried by healthy relatives and therefore was excluded, however this may be explained by reduced penetrance. The 2 other variants lacked segregation as well and therefore were also excluded. In addition, this gene-disease association is supported by animal models. Mastronotaro and colleagues (2015, PMID: 25987543) created a NEBL knockout mice that exhibited normal cardiac function up to 9 months of age but after 2 weeks of transaortic constriction (TAC), these mice showed Z-line widening since the age of 5 months and upregulation of cardiac stress genes (basal and after TAC) However, absence of clinical DCM features in KO-NEBL mice as well as Western Blot analysis which contradicted previous findings by showing a similar protein expression between knockout and wild-type mice, excluding it as evidence. Purevjav and colleagues (2010, PMID: 20951326) generated a transgenic mouse overexpressing WT or mutant NEBL under the control of the α-MyHC promoter (4 variants were tested). Mice overexpressing p.K60N or p.Q128R variants died within 1 year because of severe heart enlargement and heart failure. Mice overexpressing p.G202R or p.A592E were born and developed normally but after 6 months displayed reduced stress tolerance, cardiac enlargement due to left ventricle dilation, myocyte disarray, and interstitial cell infiltration. In summary, there is limited evidence to support this gene-disease relationship. More evidence is needed to support the relationship of NEBL and autosomal dominant DCM. This classification was approved by the ClinGen Dilated Cardiomyopathy Working Group on October 11, 2019 (SOP Version 7). Gene Clinical Validity Standard Operating Procedures (SOP) - SOP7 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9682 | BMPER |
Zornitza Stark commented on gene: BMPER: Perinatal lethal skeletal dysplasia. The primary skeletal characteristics include small chest, abnormal vertebral segmentation, and posterior rib gaps containing incompletely differentiated mesenchymal tissue. Consistent craniofacial features include ocular hypertelorism, epicanthal folds, depressed nasal bridge with short nose, and low-set ears. The most commonly described extraskeletal finding is nephroblastomatosis with cystic kidneys, but other visceral findings have been described in some cases. At least 5 unrelated families reported. |
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| Mendeliome v0.9355 | SLC4A3 |
Daniel Flanagan gene: SLC4A3 was added gene: SLC4A3 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: SLC4A3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SLC4A3 were set to PMID: 29167417; 34557911 Phenotypes for gene: SLC4A3 were set to Short QT syndrome Review for gene: SLC4A3 was set to AMBER Added comment: Moderate evidence for autosomal dominant short QT syndrome 1 by ClinGen /gene curation expert panel (PMID: 34557911). A single missense variant (absent gnomAD) identified in two SQTS families. In family 1, it segregated with SQTS (QTc<370ms) in 23 carriers, and 19 non-carriers had a QTc>370ms. In family 2, it segregated in 4 individuals. Experimental evidence from in vitro and zebrafish models suggests reduced membrane localization of the mutated protein leads to intracellular alkalinization and shortening of the cardiomyocyte action potential duration. ClinGen expert panel was divided between strong (4 votes) and moderate (5 votes). Sources: Expert Review |
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| Mendeliome v0.9274 | CDH15 |
Zornitza Stark commented on gene: CDH15: PMID: 19012874 - 4 unrelated patients with missense variants and mild-severe ID. Only two genes checked. All variants are common in gnomAD (>20 hets each) and classified as VUS or likely benign in ClinVar (paper is from 2008, pre-dates gnomAD). Functional studies were performed showing a LOF effect, where cell adhesion was reduced. However NMD PTCs are present in gnomAD (many >=6 hets each) PMID: 12052883 - null mouse model were viable, showed no gross developmental defects. In particular, the skeletal musculature appeared essentially normal. In the cerebellum of M-cadherin-lacking mutants, typical contactus adherens junctions were present and similar in size and numbers to the equivalent junctions in wild-type animals. However, the adhesion plaques in the cerebellum of these mutants appeared to contain elevated levels of N-cadherin compared to wild-type animals. PMID: 28422132 - reviewed microdeletions spanning multiple genes including CDH15, suggests it may contribute to a more severe neurological phenotype, with particular regard to brain malformations. PMID: 26506440 - speculates low penetrance for PTCs in this gene. Acknowledges variants in ExAC, describes them as benign Note no P/LP variants in ClinVar |
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| Mendeliome v0.9203 | B9D1 |
Bryony Thompson changed review comment from: hNow N PMID: 34338422 - compound het missense and frameshift variant in a proband with anal atresia with vestibular fistula, ventricular septal defect, and right renal agenesis (VACTERL cohort) PMID: 21763481 - B9d1 -/- mouse displayed polydactyly, kidney cysts, ductal plate malformations, and abnormal patterning of the neural tube, concomitant with compromised ciliogenesis, ciliary protein localization, and Hedgehog (Hh) signal transduction.; to: 3 unrelated cases with a syndromic phenotype and a supporting null mouse model PMID: 34338422 - compound het missense and frameshift variant in a proband with anal atresia with vestibular fistula, ventricular septal defect, and right renal agenesis (VACTERL cohort) PMID: 24886560 - 2 Joubert syndrome cases PMID: 21763481 - B9d1 -/- mouse displayed polydactyly, kidney cysts, ductal plate malformations, and abnormal patterning of the neural tube, concomitant with compromised ciliogenesis, ciliary protein localization, and Hedgehog (Hh) signal transduction. |
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| Mendeliome v0.9088 | PRICKLE2 |
Hazel Phillimore changed review comment from: Six subjects from four unrelated families with heterozygous variants (two de novo missense (c.122 C>T; p.(Pro41Leu) and c.680C>G; p.(Thr227Arg)), one de novo nonsense variant (c.214 C>T; p.(Arg72*) and one frameshift variant (c.1286_1287delGT; p.(Ser429Thrfs*56)) which segregated with the disease in three affected females. Loss-of-function (homozygous) variants cause seizures in flies, and both heterozygous and homozygous mice showed behavioral abnormalities including altered social interaction, learning abnormalities, and behavioural inflexibility. PubMed: 21276947.; to: Six subjects from four unrelated families with neurodevelopmental delay, behavioural difficulties and epilepsy had heterozygous variants, either de novo or segregating with disease. Two missense were de novo, c.122 C>T; p.(Pro41Leu) and c.680C>G; p.(Thr227Arg); one nonsense variant was de novo (c.214 C>T; p.(Arg72*); and one frameshift variant segregated with the disorder in three affected females (c.1286_1287delGT; p.(Ser429Thrfs*56)). Loss-of-function (homozygous) variants have been shown to cause seizures in flies; and both heterozygous and homozygous mice have shown behavioral abnormalities including altered social interaction, learning abnormalities, and behavioral inflexibility (PubMed: 21276947). |
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| Mendeliome v0.9082 | UBE2U |
Ee Ming Wong changed review comment from: - one missense UBE2U variant identified in one family with four other affected individuals (includes proband) - in silico analyses predicts the UBE2U variant to be damaging - no functional - another STUM missense variant identified in the same family predicted to be benign - additional clinical assessment indicated that the family shared some systemic dysmorphisms and learning disabilities similar to RIDDLE syndrome Sources: Literature; to: - one missense UBE2U variant identified in one family with five affected individuals (includes proband) - in silico analyses predicts the UBE2U variant to be damaging - no functional - another STUM missense variant identified in the same family predicted to be benign - additional clinical assessment indicated that the family shared some systemic dysmorphisms and learning disabilities similar to RIDDLE syndrome Sources: Literature |
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| Mendeliome v0.9075 | UBE2U |
Ee Ming Wong gene: UBE2U was added gene: UBE2U was added to Mendeliome. Sources: Literature Mode of inheritance for gene: UBE2U was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: UBE2U were set to PMID: 33776059 Phenotypes for gene: UBE2U were set to Retinoschisis; cataracts; learning disabilities; developmental delay Penetrance for gene: UBE2U were set to Complete Review for gene: UBE2U was set to RED gene: UBE2U was marked as current diagnostic Added comment: - one missense UBE2U variant identified in one family with four other affected individuals (includes proband) - in silico analyses predicts the UBE2U variant to be damaging - no functional - another STUM missense variant identified in the same family predicted to be benign - additional clinical assessment indicated that the family shared some systemic dysmorphisms and learning disabilities similar to RIDDLE syndrome Sources: Literature |
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| Mendeliome v0.9068 | CACNA1I |
Kristin Rigbye gene: CACNA1I was added gene: CACNA1I was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CACNA1I was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CACNA1I were set to 33704440 Phenotypes for gene: CACNA1I were set to Neurodevelopmental disorder Mode of pathogenicity for gene: CACNA1I was set to Other Review for gene: CACNA1I was set to GREEN Added comment: 4 different missense variants identified and shown to result in a gain of function. 2 individuals with de novo variants (a 3rd also suspected de novo but their father was unavailable for testing) - these patients all had severe neurodevelopmental disorders, involving severe global developmental delay, absence of speech, gross motor delay, muscular hypotonia, early-onset seizures, cortical visual impairment, and feeding difficulties. Variable clinical features include various brain malformations, startle response or seizures, postnatal growth retardation, gastroesophageal reflux, and gastrostomy. 1 family had three affected individuals - variable cognitive impairment in all, involving borderline intellectual functioning or mild or moderate intellectual disability as main clinical feature, with late-onset seizures in the mother and speech retardation in one of the children. This variant had a milder functional effect than the variants in sporadic cases. Sources: Literature |
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| Mendeliome v0.9012 | NPR2 |
Zornitza Stark changed review comment from: Over 15 unrelated families; Biallelic (missense, nonsense, frameshift, splice) NPR2 variants; loss of function; multiple mouse models. Disorder is characterised by severe dwarfism with shortening of the middle and distal segments of the limbs (disproportionate) with skeletal growth falling off sharply after birth.; to: Bi-allelic variants: Over 15 unrelated families; Biallelic (missense, nonsense, frameshift, splice) NPR2 variants; loss of function; multiple mouse models. Disorder is characterised by severe dwarfism with shortening of the middle and distal segments of the limbs (disproportionate) with skeletal growth falling off sharply after birth. Mono-allelic variants have been linked to both tall stature and short stature disorders. Multiple families. |
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| Mendeliome v0.9012 | NPR2 | Zornitza Stark reviewed gene: NPR2: Rating: GREEN; Mode of pathogenicity: None; Publications: 31555216, 16384845, 15146390; Phenotypes: Acromesomelic dysplasia, Maroteaux type MIM# 602875, Short stature, disproportionate, Oval vertebral bodies in infancy, Progressive shortening of humerus, radius and ulna in first year, dwarfism, Prominent forehead; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9003 | ROR2 | Zornitza Stark Phenotypes for gene: ROR2 were changed from to Robinow syndrome, autosomal recessive MIM# 268310; hypertelorism; short stature; mesomelic shortening of the limbs; hypoplastic genitalia; rib/vertebral anomalies; abnormal morphogenesis of the face; Brachydactyly, type B1 MIM# 113000; hypoplasia/aplasia of distal phalanges and nails (2-5) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9000 | ROR2 | Zornitza Stark reviewed gene: ROR2: Rating: GREEN; Mode of pathogenicity: None; Publications: 10932186, 10932187, 10986040, 19461659; Phenotypes: Robinow syndrome, autosomal recessive MIM# 268310, hypertelorism, short stature, mesomelic shortening of the limbs, hypoplastic genitalia, rib/vertebral anomalies, abnormal morphogenesis of the face, Brachydactyly, type B1 MIM# 113000, hypoplasia/aplasia of distal phalanges and nails (2-5); Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8834 | RNF220 |
Zornitza Stark gene: RNF220 was added gene: RNF220 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RNF220 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RNF220 were set to 33964137; 10881263 Phenotypes for gene: RNF220 were set to Leukodystrophy; CNS hypomyelination; Ataxia; Intellectual disability; Sensorineural hearing impairment; Elevated hepatic transaminases; Hepatic fibrosis; Dilated cardiomyopathy; Spastic paraplegia; Dysarthria; Abnormality of the corpus callosum Review for gene: RNF220 was set to GREEN Added comment: Sferra et al (2021 - PMID: 33964137) provide extensive evidence that biallelic RNF220 mutations cause a disorder characterized by hypomyelinating leukodystrophy, ataxia (9/9 - onset 1-5y), borderline intellectual functioning (3/9) / intellectual disability (5/9 - in most cases mild), sensorineural deafness (9/9) with complete hearing loss in the first decade of life, hepatopathy (9/9) with associated periportal fibrosis, and dilated cardiomyopathy (9/9) which was fatal. Other neurologic manifestations apart from ataxia incl. hyperreflexia (8/8), spastic paraplegia (9/9), dysarthria (9/9), peripheral neuropathy (4/9), seizures in one case (1/9). Upon brain MRI there was thin corpus callosum (9/9) or cerebellar atrophy in some (2/9). The authors identified homozygosity for 2 recurrent missense RNF220 variants in affected members belonging to these 5 broad consanguineous pedigrees (7 families), namely NM_018150.4:c.1094G>A / p.Arg365Gly in 4 Roma families in the context of a shared haplotype (/founder effect) as well as c.1088G>A / p.Arg363Gly in a large pedigree from southern Italy initially reported by Leuzzi et al (2000 - PMID: 10881263). Extensive segregation analyses were carried out including several affected and unaffected members. RNF220 encodes ring finger protein 220, which functions as an E3 ubiquitin ligase. Previous studies have shown among others a role in modulation of Sonic hedgehog/GLI signaling and cerebellar development Evidence for the role of RNF220 included relevant expression, localization within the cell, interaction partners (lamin B1, 20S proteasome), similarities with other laminopathies in terms of phenotype, etc : *RNF220 has a relevant expression pattern in CNS (based on qRT-PCR analyses in human brain, cerebellum, cerebral cortex / mRNA levels in human fetal CNS with higher expression in cerebellum, spinal cord and cortex / previous GTEx data / protein levels in mouse CNS) *The protein displays nuclear localization based on iPSC cells differentiated to motor neurons (also supported by data from the Human Protein Atlas). Transfection of COS-1 cells demonstrated localization primarily to the nucleus (as also previously demonstrated in HEK293T cells) in vesicle like structures with ASF2/SF2 colocalization suggesting enrichment in nuclear speckles. There was also partial co-distribution with the 20S proteasome. R363Q and R365Q additionally coalesced in the cytoplasm forming protein aggregates/inclusions. *Immunofluorescence studies in patient fibroblasts also confirmed abnormal increase of the protein in the cytoplasm and increased fluorescence with the 20S proteasome. *Proteomic identification of RNF220-interacting proteins in transfected HEK293T cells demonstrated enrichment for all members of the lamin protein family (incl . lamin B1, AC, B2). *RNAi-mediated downregulation of RNF222 in Drosophila suggested altered subcellular localization and accumulation of the fly orthologue for human lamin B1. *Immunoprecipitation of lamin B1 from the nuclear matrix of cerebellar cells suggested significant interaction of endogenous lamin B1 with RNF220, while transfection studies in HEK293T cells for wt/mt suggested reduced binding to endogenous lamin B1 for RNF220 mt compared to wt (more prominent for R365Q). RNF220 mutants also reduced ubiquitination of nuclear lamin B1 compared to wt. *Patient fibroblasts immunostained with different nuclear envelope markers displayed abnormal nuclear shapes with multiple invaginations and lobulations, findings also observed in laminopathies. Sources: Literature |
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| Mendeliome v0.8829 | ARF3 |
Zornitza Stark gene: ARF3 was added gene: ARF3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ARF3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: ARF3 were set to 34346499 Phenotypes for gene: ARF3 were set to Global developmental delay; Intellectual disability; Seizures; Morphological abnormality of the central nervous system Review for gene: ARF3 was set to AMBER Added comment: Sakamoto et al (2021 - PMID: 34346499) provide some evidence that monoallelic ARF3 pathogenic variants may be associated with a NDD with brain abnormality. Using trio exome sequencing, the authors identified 2 individuals with NDD harboring de novo ARF3 variants, namely: NM_001659.2:c.200A>T / p.Asp67Val and c.296G>T / p.Arg99Leu. Individual 1 (with Asp67Val / age : 4y10m), appeared to be more severelely affected with prenatal onset progressive microcephaly, severe global DD, epilepsy. Upon MRI there was cerebellar and brainstem atrophy. Individual 2 (Arg99Leu / 14y) had severe DD and ID (IQ of 23), epilepsy and upon MRI cerebellar hypoplasia. This subject did not exhibit microcephaly. Common facial features incl. broad nose, full cheeks, small philtrum, strabismus, thin upper lips and abnormal jaw. There was no evidence of systemic involvement in both. ARF3 encodes ADP-ribosylation factor 3. Adenosine diphosphate ribosylation factors (ARFs) are key proteins for regulation of cargo sorting at the Golgi network, with ARF3 mainly working at the trans-Golgi network. ARFs belong to the small GTP-binding protein (G protein) superfamily. ARF3 switches between an active GTP-bound form and an inactive GDP-bound form, regulated by guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs) respectively. Members of the ARF superfamily regulate various aspects of membrane traffic, among others in neurons. There are 5 homologs of ARF families, divided in 3 classes. ARF3 and ARF1 belong to class I. Monoallelic ARF1 mutations are associated with Periventricular nodular heterotopia 8 (MIM 618185). In vivo, in vitro and in silico studies for the 2 variants suggest that both impair the Golgi transport system although each variant most likely exerts a different effect (gain-of-function for Arg99Leu vs loss-of-function/dominant-negative for Asp67Val). This was also reflected in somewhat different phenotype of the subjects with the respective variants. Common features included severe DD, epilepsy and brain abnormalities although Asp67Val was associated with diffuse brain atrophy as well as congenital microcephaly and Arg99Leu with cerebellar hypoplasia. Evidence to support the effect of each variant include: Arg99Leu: Had identical Golgi localization to that of wt Had increased binding activity with GGA1, a protein recruited by the GTP-bound active form of ARF3 to the TGN membrane (supporting GoF) In silico structural analysis suggested it may fail to stabilize the conformation of Asp26, resulting in impaired GTP hydrolysis (GoF). In transgenic fruit flies, evaluation of the ARF3 variant toxicity using the rough eye phenotype this variant was associated with increased severity of the r-e phenotype similar to a previously studied GoF variant (Gln71Leu) Asp67Val: Did not show a Golgi-like pattern of localization (similar to Thr31Asn a previously studied dominant-negative variant) Displayed decreased protein stability In silico structural analysis suggested that Asp67Val may lead to compromised binding of GTP or GDP (suggestive of LoF) In transgenic Drosophila eye-specific expression of Asp67Val (similar to Thr31Asn, a known dominant-negative variant) was lethal possibly due to high toxicity in very small amounts in tissues outside the eye. There is no associated phenotype in OMIM, G2P or SysID. Sources: Literature |
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| Mendeliome v0.8824 | PLXNA2 |
Zornitza Stark gene: PLXNA2 was added gene: PLXNA2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PLXNA2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PLXNA2 were set to 34327814 Phenotypes for gene: PLXNA2 were set to Intellectual disability; Abnormality of the face; Failure to thrive; Abnormal heart morphology Review for gene: PLXNA2 was set to AMBER Added comment: Altuame et al (2021 - PMID: 34327814) describe 3 individuals from 2 consanguineous Arab families with biallelic PLXNA2 variants. The index patient from the 1st family presented with CHD (hypoplastic right ventricle, ASD), DD and moderate ID (IQ of 40), failure to thrive as well as some dysmorphic features (obtuse mandibular angle, mild overbite, synophrys with downslanting p-f, strabismus, etc). There were additional features (eg. postaxial polydactyly) which were found in other affected and unaffected family members. Exome sequencing with autozygome analysis revealed homozygosity for a PLXNA2 stopgain variant (NM_025179:c.3603C>A / p.(Cys1201*)). Sanger confirmation was carried out and segregation analyses confirmed carrier status of the unaffected parents and a sib as well as a brother homozygous for the same variant. Clinical evaluation of the latter, following this finding revealed borderline intellectual functioning, ADHD, failure to thrive. There was no mandibular anomaly or overbite and no clinical evidence of CHD (no echo performed). The index patient from the 2nd consanguineous family was evaluated for ID (IQ of 63), with previous borderline motor development, ADHD and some dysmorphic features (obtuse mandibular angle and overbite). There was no clinical evidence of CHD (no echo performed). Exome sequencing with autozygosity mapping revealed a homozygous missense PLXNA2 variant (c.3073G>A / p.(Asp1025Asn), present only once in gnomAD (htz), with rather non-concordant in silico predictions SIFT 0.22, PolyPhen 0.682 and CADD 23.5. The aa was however highly conserved. Segregation analysis confirmed carrier state of the parents and 2 unaffected sibs, with a 3rd sib homozygous for the wt allele. As the authors discuss: *PLXNA2 belongs to the plexin family of genes, encoding transmbembrane proteins functioning as semaphorin receptors. It has predominant expression in neural tissue. The protein is thought to bind semaphorin-3A, -3C or -5 followed by plexin A2 dimerization, activation of its GTPase-activating protein domain, negative regulation of Rap1B GTPase and initiation of a signal transduction cascade mediating axonal repulsion/guidance, dendritic guidance, neuronal migration. *Murine Plxna2 knockout models display structural brain defects. In addition they display congenital heart defects incl. persistent truncus arteriosus and interrupted aortic arch. *Rare CNVs in adult humans with tetralogy of Fallot have suggested a potential role of PLXNA2 in cardiac development and CHD. *Expression and the role of PLXNA2 in human chondrocytes as well as a GWAS in 240 japanese patients with mandibular prognathism where PLXNA2 was suggested as a susceptibility locus. Overall, the authors recognize some common features (as for cognitive functioning, some dysmorphic features incl. obtuse mandibular angle and overbite in 2 unrelated subjects, failure to thrive 3/3) and provide plausible explanations for the variability / discordance of others eg: - Cyanotic heart disease explaining discordance in cognitive outcome among sibs - Incomplete penetrance for CHD (and/or ID or mandibular anomaly) as for few AR disorders and/or - Additional pathogenic variants possibly explaining the CHD in the first subject. There is no associated phenotype in OMIM or G2P. SysID includes PLXNA2 among the candidate ID genes. Sources: Literature |
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| Mendeliome v0.8803 | AMTN |
Zornitza Stark gene: AMTN was added gene: AMTN was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: AMTN was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AMTN were set to 27412008; 25715379; 26620968 Phenotypes for gene: AMTN were set to Amelogenesis imperfecta, type IIIB Mode of pathogenicity for gene: AMTN was set to Other Review for gene: AMTN was set to RED Added comment: In a Costa Rican family segregating autosomal dominant hypomineralized amelogenesis imperfecta, Smith et al. (2016) identified a heterozygous deletion/insertion mutation in the amelotin gene that segregated with the phenotype in the family. The mutation was predicted to result in an in-frame deletion of 92 amino acids, shortening the protein from 209 to 117 amino acids. Mode of pathogenicity not established. Toxic gain of function proposed as Atmn KO and +/- mice did not recapitulate the human phenotype. Sources: Expert Review |
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| Mendeliome v0.8792 | RELT |
Zornitza Stark gene: RELT was added gene: RELT was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: RELT was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RELT were set to 30506946 Phenotypes for gene: RELT were set to Amelogenesis imperfecta, type IIIC, MIM# 618386 Review for gene: RELT was set to GREEN Added comment: Amelogenesis imperfecta type IIIC is characterized by hypocalcified enamel in both the primary and secondary dentition. The enamel is rough and yellow-brown; under normal use, the enamel disintegrates from occlusal surfaces of the molars, leaving a ring of intact enamel remaining on the sides. At least 3 families and a mouse model. Sources: Expert Review |
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| Mendeliome v0.8741 | TCF7L2 |
Zornitza Stark changed review comment from: 2 reviews Konstantinos Varvagiannis (Other) I don't know Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants. Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11). One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury. TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts. Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development. Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1]. The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA). No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism. There are no variant or other studies performed, nor any animal models discussed. In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs). Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm. There is no other associated phenotype (notably NDD) in OMIM. G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF). SysID includes this gene within the autism candidate genes and current primary ID genes.; to: Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants. Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11). One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury. TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts. Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development. Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1]. The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA). No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism. There are no variant or other studies performed, nor any animal models discussed. In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs). Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm. There is no other associated phenotype (notably NDD) in OMIM. G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF). SysID includes this gene within the autism candidate genes and current primary ID genes. |
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| Mendeliome v0.8736 | PIDD1 |
Zornitza Stark gene: PIDD1 was added gene: PIDD1 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: PIDD1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PIDD1 were set to 28397838; 29302074; 33414379; 34163010 Phenotypes for gene: PIDD1 were set to Global developmental delay; Intellectual disability; Seizures; Autism; Behavioral abnormality; Psychosis; Pachygyria; Lissencephaly; Abnormality of the corpus callosum Review for gene: PIDD1 was set to GREEN Added comment: There is enough evidence to include this gene in the current panel with green rating. Biallelic PIDD1 pathogenic variants have been reported in 26 individuals (11 families) with DD (all), variable degrees of ID (mild to severe), behavioral (eg. aggression/self-mutilation in several, ADHD) and/or psychiatric abnormalities (ASD, psychosis in 5 belonging to 3 families), well-controlled epilepsy is some (9 subjects from 6 families) and MRI abnormalities notably abnormal gyration pattern (pachygyria with predominant anterior gradient) as well as corpus callosum anomalies (commonly thinning) in several. Dysmorphic features have been reported in almost all, although there has been no specific feature suggested. The first reports on the phenotype associated with biallelic PIDD1 mutations were made by Harripaul et al (2018 - PMID: 28397838) and Hu et al (2019 - PMID: 29302074) [both studies investigating large cohorts of individuals with ID from consanguineous families]. Sheikh et al (2021 - PMID: 33414379) provided details on the phenotype of 15 individuals from 5 families including those from the previous 2 reports and studied provided evidence on the role of PIDD1 and the effect of variants. Zaki et al (2021 - PMID: 34163010) reported 11 additional individuals from 6 consanguineous families, summarize the features of all subjects published in the literature and review the neuroradiological features of the disorder. PIDD1 encodes p53-induced death domain protein 1. The protein is part of the PIDDosome, a multiprotein complex also composed of the bipartite linker protein CRADD (also known as RAIDD) and the proform of caspase-2 and induces apoptosis in response to DNA damage. There are 5 potential PIDD1 mRNA transcript variants with NM_145886.4 corresponding to the longest. Similar to the protein encoded by CRADD, PIDD1 contains a death domain (DD - aa 774-893). Constitutive post-translational processing gives PIDD1-N, PIDD1-C the latter further processed into PIDD1-CC (by auto-cleavage). Serine residues at pos. 446 and 588 are involved in this autoprocessing generating PIDD1-C (aa 446-910) and PIDD1-CC (aa 774-893). The latter is needed for caspase-2 activation. Most (if not all) individuals belonged to consanguineous families of different origins and harbored pLoF or missense variants. Variants reported so far include : c.2587C>T; p.Gln863* / c.1909C>T ; p.Arg637* / c.2443C>T / p.Arg815Trp / c.2275-1G>A which upon trap assay was shown to lead to skipping of ex15 with direct splicing form exon14 to the terminal exon 16 (resulting to p.Arg759Glyfs*1 with exlcusion of the entire DD) / c.2584C>T; p.Arg862Trp / c.1340G>A; p.Trp447* / c.2116_2120del; p.Val706His*, c.1564_1565del; p.Gly602fs*26 Evidence so far provided includes: - Biallelic CRADD variants cause a NDD disorder and a highly similar gyration pattern. - Confirmation of splicing effect (eg. for c.2275-1G>A premature stop in position 760) or poor expression (NM_145886.3:c.2587C>T; p.Gln863*). Arg815Trp did not affect autoprocessing or protein stability. - Abnormal localization pattern, loss of interaction with CRADD and failure to activate caspase-2 (MDM2 cleavage assay) [p.Gln863* and Arg815Trp] - Available expression data from GTEx (PIDD1 having broad expression in multiple tissues, but higher in brain cerebellum) as well as BrainSpan and PsychEncode studies suggesting high coexpression of PIDD1, CRADD and CASP2 in many regions in the developing human brain. - Variants in other genes encoding proteins interacting with PIDD1 (MADD, FADD, DNAJ, etc) are associated with NDD. Pidd-1 ko mice (ex3-15 removal) lack however CNS-related phenotypes. These show decreased anxiety but no motor anomalies. This has also been the case with Cradd-/- mice displaying no significant CNS phenotypes without lamination defects. There is currently no associated phenotype in OMIM. PIDD1 is listed in the DD panel of G2P (PIDD1-related NDD / biallelic / loss of function / probable) . SysID includes PIDD1 among the current primary ID genes. Sources: Expert Review |
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| Mendeliome v0.8725 | RNF168 | Zornitza Stark Phenotypes for gene: RNF168 were changed from to RIDDLE syndrome MIM# 611943; Radiosensitivity; Immune Deficiency; Dysmorphic Features; Learning difficulties; Low IgG or IgA; Short stature; mild defect of motor control to ataxia; normal intelligence to learning difficulties; mild facial dysmorphism to microcephaly | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8713 | RNF168 | Danielle Ariti reviewed gene: RNF168: Rating: GREEN; Mode of pathogenicity: None; Publications: 19203578, 21394101, 29255463, 21552324; Phenotypes: RIDDLE syndrome MIM# 611943, Radiosensitivity, Immune Deficiency, Dysmorphic Features, Learning difficulties, Low IgG or IgA, Short stature, mild defect of motor control to ataxia, normal intelligence to learning difficulties, mild facial dysmorphism to microcephaly; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.8667 | SF3B2 |
Zornitza Stark gene: SF3B2 was added gene: SF3B2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SF3B2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SF3B2 were set to 34344887 Phenotypes for gene: SF3B2 were set to Craniofacial microsomia Review for gene: SF3B2 was set to GREEN Added comment: Twenty individuals from seven families reported with de novo or transmitted haploinsufficient variants in SF3B2. Affected individuals had mandibular hypoplasia, microtia, facial and preauricular tags, epibulbar dermoids, lateral oral clefts in addition to skeletal and cardiac abnormalities. Targeted morpholino knockdown of SF3B2 in Xenopus resulted in disruption of cranial neural crest precursor formation and subsequent craniofacial cartilage defects, supporting a link between spliceosome mutations and impaired neural crest development in congenital craniofacial disease. The families were ascertained from a cohort and the authors suggest that haploinsufficient variants in SF3B2 are the most prevalent genetic cause of CFM, explaining ~3% of sporadic and ~25% of familial cases. Sources: Literature |
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| Mendeliome v0.8601 | CLCN3 |
Kristin Rigbye gene: CLCN3 was added gene: CLCN3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CLCN3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: CLCN3 were set to PMID: 34186028 Phenotypes for gene: CLCN3 were set to Neurodevelopmental disorder Mode of pathogenicity for gene: CLCN3 was set to Other Review for gene: CLCN3 was set to GREEN Added comment: 11 individuals reported, 9 that carried 8 different rare heterozygous missense variants in CLCN3, and 2 siblings that were homozygous for an NMD-predicted frameshift variant likely abolishing ClC-3 function. All missense variants were confirmed to be de novo in eight individuals for whom parental data was available. The 11 individuals in the cohort share clinical features of variable severity. All 11 have GDD or ID and dysmorphic features, and a majority has mood or behavioural disorders and structural brain abnormalities: - Structural brain abnormalities on MRI (9/11) included partial or full agenesis of the corpus callosum (6/9), disorganized cerebellar folia (4/9), delayed myelination (3/9), decreased white matter volume (3/9), pons hypoplasia (3/9), and dysmorphic dentate nuclei (3/9). Six of those with brain abnormalities also presented with seizures. - Nine have abnormal vision, including strabismus in four and inability to fix or follow in the two with homozygous loss-of-function variants. - Hypotonia ranging from mild to severe was reported in 7 of the 11 individuals. - Six have mood or behavioural disorders, particularly anxiety (3/6). - Consistent dysmorphic facial features included microcephaly, prominent forehead, hypertelorism, down-slanting palpebral fissures, full cheeks, and micrognathia. The severity of disease in the two siblings with homozygous disruption of ClC-3 is consistent with the drastic phenotype seen in Clcn3 KO mice. The disease was more severe in two siblings carrying homozygous loss-of-function variants with the presence of GDD, absent speech, seizures, and salt and pepper fundal pigmentation in both individuals, with one deceased at 14 months of age. The siblings also had significant neuroanatomical findings including diffusely decreased white matter volume, thin corpora callosa, small hippocampi, and disorganized cerebellar folia. Supporting biallelic inheritance for LoF variants, disruption of mouse Clcn3 results in drastic neurodegeneration with loss of the hippocampus a few months after birth and early retinal degeneration. Clcn3−/− mice display severe neurodegeneration, whereas heterozygous Clcn3+/− mice appear normal. Patch-clamp studies were used to investigate four of the missense variants. These suggested a gain of function in two variants with increased current in HEK cells, however they also showed reduced rectification of voltage and a loss of transient current, plus decreased current amplitude, glycosylation and surface expression when expressed in oocytes, and were suspected to interfere with channel gating and a negative feedback mechanism. These effects were also shown to vary depending on pH levels. The current of the remaining two variants did not differ from WT. For heterozygous missense variants, the disruption induced may be at least partially conferred to mutant/WT homodimers and mutant/ClC-4 heterodimers. Both loss and gain of function in this gene resulted in the same phenotype. Sources: Literature |
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| Mendeliome v0.8600 | AP1G1 |
Danielle Ariti gene: AP1G1 was added gene: AP1G1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: AP1G1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal Publications for gene: AP1G1 were set to 34102099 Phenotypes for gene: AP1G1 were set to Neurodevelopmental disorder (NDD); Intellectual Disability; Epilepsy Mode of pathogenicity for gene: AP1G1 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: AP1G1 was set to GREEN Added comment: Two bi-allelic homozygous missense variants were found in two distinct families with Italian and Pakistani origins; homozygous missense variants. Eight de novo heterozygous variants were identified in nine isolated affected individuals from nine families; including five missense, two frameshift, and one intronic variant that disrupts the canonical splice acceptor site. Knocking out AP1G1 Zebrafish model resulted in severe developmental abnormalities and increased lethality. All individuals had neurodevelopmental disorder (NDD) including global developmental delay and ID, which varied in severity from mild to severe. Sources: Literature |
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| Mendeliome v0.8598 | SPTBN1 |
Belinda Chong changed review comment from: PMID: 34211179 - Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures; behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features. - Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics. PMID: 33847457 - Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset. - identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities). - Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis. Sources: Literature; to: PMID: 34211179 - Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures (9/29); behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features. - Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics. PMID: 33847457 - Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset. - identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities). - Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis. Sources: Literature |
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| Mendeliome v0.8586 | SPTBN1 |
Belinda Chong gene: SPTBN1 was added gene: SPTBN1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SPTBN1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: SPTBN1 were set to PMID: 34211179; PMID: 33847457 Phenotypes for gene: SPTBN1 were set to Neurodevelopmental Syndrome Review for gene: SPTBN1 was set to GREEN Added comment: PMID: 34211179 - Heterozygous SPTBN1 variants in 29 individuals with developmental, language and motor delays; mild to severe intellectual disability; autistic features; seizures; behavioral and movement abnormalities; hypotonia; and variable dysmorphic facial features. - Show that these SPTBN1 variants lead to effects that affect βII-spectrin stability, disrupt binding to key molecular partners, and disturb cytoskeleton organization and dynamics. PMID: 33847457 - Common features include global developmental delays, intellectual disability, and behavioral disturbances. Autistic features (4/6) and epilepsy (2/7) or abnormal electroencephalogram without overt seizures (1/7) were present in a subset. - identified seven unrelated individuals with heterozygous SPTBN1 variants: two with de novo missense variants and five with predicted loss-of-function variants (found to be de novo in two, while one was inherited from a mother with a history of learning disabilities). - Identification of loss-of-function variants suggests a haploinsufficiency mechanism, but additional functional studies are required to fully elucidate disease pathogenesis. Sources: Literature |
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| Mendeliome v0.8522 | SYNCRIP |
Zornitza Stark gene: SYNCRIP was added gene: SYNCRIP was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SYNCRIP was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: SYNCRIP were set to 34157790; 30504930; 27479843; 23020937 Phenotypes for gene: SYNCRIP were set to Global developmental delay; Intellectual disability; Autism; Myoclonic atonic seizures; Abnormality of nervous system morphology Review for gene: SYNCRIP was set to GREEN Added comment: Semino et al (2021 - PMID: 34157790) provide clinical details on 3 unrelated individuals with de novo SYNCRIP variants and provide a review of 5 additional subjects previously identified within large cohorts in the literature and databases. Features included DD, ID (7/7 for whom this information was available), ASD or autistic features (4/7). MRI abnormalities were observed in 3 (widening of CSF spaces, periventricular nodular heterotopia, prominent lat. ventricles). Epilepsy (myoclonic-astatic epilepsy / Doose syndrome) was reported for 2(/8) individuals. The 3 patients here reported were identified following trio/singleton exome with Sanger confirmation of the variants and their de novo occurrence. Variants are in almost all cases de novo (7/7 for whom this was known) and in 5/8 cases were pLoF, in 2/8 missense SNVs while a case from DECIPHER had a 77.92 kb whole gene deletion not involving other genes with unknown inheritance. Overall the variants reported to date include [NM_006372.5]: 1 - c.858_859del p.(Gly287Leufs*5) 2 - c.854dupA p.(Asn285Lysfs*8) 3 - c.734T>C p.(Leu245Pro) 4 - chr6:85605276-85683190 deletion (GRCh38) 5 - c.629T>C p.(Phe210Ser) 6 - c.1573_1574delinsTT p.(Gln525Leu) 7 - c.1247_1250del p.(Arg416Lysfs*145) 8 - c.1518_1519insC p.(Ala507Argfs*14) [P1-3: this report, P4: DECIPHER 254774, P5-6: Guo et al 2019 - PMID: 30504930, P7: Lelieveld et al 2016 - PMID: 27479843, P8: Rauch et al 2012 - PMID: 23020937 / all other Refs not here reviewed, clinical details summarized by Semino et al in table 1] SYNCRIP (also known as HNRNPQ) encodes synaptotagmin‐binding cytoplasmic RNA‐interacting protein. As the authors note, this RNA-binding protein is involved in multiple pathways associated with neuronal/muscular developmental disorders. Several references are provided for its involvement in regulation of RNA metabolism, among others sequence recognition, pre-mRNA splicing, translation, transport and degradation. Mutations in other RNA-interacting proteins and hnRNP members (e.g. HNRNPU, HNRNPD) are associated with NDD. The missense variant (p.Leu245Pro) is within RRM2 one of the 3 RNA recognition motif (RRM) domains of the protein. These 3 domains, corresponding to the central part of the protein (aa 150-400), are relatively intolerant to variation (based on in silico predictions and/or variation in gnomAD). Leu245 localizes within an RNA binding pocket and in silico modeling suggests alteration of the tertiary structure and RNA-binding capacity of RRM2. There are no additional studies performed. Overall haploinsufficiency appears to be the underlying disease mechanism based on the truncating variants and the gene deletion. [pLI in gnomAD : 1, %HI : 2.48%] Animal models are not discussed. There is no associated phenotype in OMIM. This gene is included in the DD panel of G2P (monoallelic LoF variants / SYNCRIP-related developmental disorder). SysID also lists SYNCRIP within the current primary ID genes. Sources: Literature |
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| Mendeliome v0.8388 | PCDHGC4 |
Zornitza Stark gene: PCDHGC4 was added gene: PCDHGC4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PCDHGC4 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PCDHGC4 were set to 34244665 Phenotypes for gene: PCDHGC4 were set to Intellectual disability; Seizures Review for gene: PCDHGC4 was set to GREEN Added comment: Eight variants reported in 19 members of nine unreleted families with a neurodevelopmental syndrome. Severe or moderate intellectual disabilty in eight families and seizures in four families. Four of the variants were LoF, in silico analysis of the remaining missense (n=3) and splice variants were predicted to be pathogenic. Sources: Literature |
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| Mendeliome v0.8335 | IMPDH2 |
Laura Raiti gene: IMPDH2 was added gene: IMPDH2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: IMPDH2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: IMPDH2 were set to PMID: 33098801 Phenotypes for gene: IMPDH2 were set to Dystonia Review for gene: IMPDH2 was set to GREEN Added comment: 6 unrelated individuals 1x individual in a dystonia cohort index case with infancy-onset dystonia and other neurological manifestations with a de-novo missense variant, c.338G>A (p.Gly113Glu) in IMPDH2, predicted to disrupt an invariant residue within the cystathionine-β-synthase (CBS) domain pair of the encoded protein. IMPDH2 encodes IMPDH2, a key enzyme in the purine biosynthetic pathway, expressed throughout the brain and not linked previously to any human Mendelian condition. 1x individual with a de-novo substitution, c.337G>A (p.Gly113Arg), was found in in-house whole-exome sequencing data from 500 individuals with neurodevelopmental disorders. Through GeneMatcher, de novo variants identified: 3 x missense: c.729G>C (p.Gln243His), c.619G>C (p.Gly207Arg), and c.619G>A (p.Gly207Arg) 1 x deletion: c.478_480delTCC (p.Ser160del) The six variants were predicted to be deleterious and none of them seen in control databases. All affected conserved amino acids and resided in and around the cystathionine-β-synthase domain pair. The described variants are situated in and around the CBS domain pair, a regulatory element in which clustering of pathogenic missense variants has already been shown for the homologue of IMPDH2, IMPDH1. The variant carriers shared similar neurodevelopmental phenotypes. Apart from the dystonia cohort index case, one participant had evidence of dystonic posturing. Modelling of the variants on 3D protein structures revealed spatial clustering near specific functional sites, predicted to result in deregulation of IMPDH2 activity. Additionally, thermal-shift assays showed that the c.619G>A (p.Gly207Arg) variant, identified as within the CBS domain pair, and c.729G>C (p.Gln243His), which is in close vicinity, affected the stability or folding behaviour of IMPDH2. Sources: Literature |
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| Mendeliome v0.8263 | EPHA7 |
Zornitza Stark gene: EPHA7 was added gene: EPHA7 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: EPHA7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: EPHA7 were set to 34176129 Phenotypes for gene: EPHA7 were set to Intellectual disability Review for gene: EPHA7 was set to AMBER Added comment: Lévy et al (2021 - PMID: 34176129) provide evidence that haploinssuficiency of EPHA7 results in a neurodevelopmental disorder. The authors report on 12 individuals belonging to 9 unrelated families, all harboring with 6q microdeletions spanning EPHA7. Overlapping features included DD (13/13), ID (10/10 - mild in most cases, individuals with larger CNVs/additional variants had more severe phenotype), speech delay and behavioral disorders. Variable other features incl. hypotonia (70%), non specific facial features, eye abnormalities (40%) and cardiac defects (25%). The CNVs ranged from 152 kb to few Mb in size but in 4 subjects (P5-8) were only minimal, involving only EPHA7. 9 out of 12 individuals had inherited the deletion (5 subjects paternal, 4 maternal), in 1 subject (P12) this occured de novo, while for 2 others inheritance was not specified. Most deletions were inherited from an unaffected parent (in 6/7 families), with unclear contribution in a further one. The authors discuss on previous studies suggesting an important role for EphA7 in brain development (modulation of cell-cell adhesion and repulsion, regulation of dendrite morphogenesis in early corticogenesis, role in dendritic spine formation later in development. EphA7 has also been proposed to drive neuronal maturation and synaptic function). Haploinsufficiency for other ephrins or ephrin receptors has been implicated in other NDDs. Overall Lévy et al promote incomplete penetrance and variable expressivity with haploinsufficiency of this gene being a risk factor for NDD. [The gene has also an %HI of 2.76% and a pLI of 1]. Sources: Expert Review |
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| Mendeliome v0.8229 | ATP2C2 |
Eleanor Williams gene: ATP2C2 was added gene: ATP2C2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ATP2C2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: ATP2C2 were set to 33864365; 28440294 Phenotypes for gene: ATP2C2 were set to language impairment, HP:0002463 Review for gene: ATP2C2 was set to RED Added comment: PMID: 33864365 - Martinelli et al 2021 - report a family with a missense variant NM_001286527.2:c.304G>A, p.(Val102Met) in ATP2C2 in a father and two siblings with specific language impairment. However two other affected siblings did not have this variant. This variant was also reported by Chen et al. They found that the variant had a higher frequency in language cases (1.8%, N = 360) compared with cohorts selected for dyslexia (0.8%, N = 520) and ADHD (0.7%, N = 150), which presented frequencies comparable to reference databases (0.9%, N = 24 046 gnomAD controls). They postulate that variant is not sufficient on its own to cause a disorder but is a susceptibility factor which increases the risk for language impairment. PMID: 28440294 - Chen et al 2017 - report 2 probands with severe learning impairment, and missense variants in ATP2C2 (NM_001286527: c.G304A:p.V102M and NM_001291454:exon21: c.C1936T:p.R646W). Sources: Literature |
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| Mendeliome v0.8201 | ERGIC3 |
Elena Savva gene: ERGIC3 was added gene: ERGIC3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ERGIC3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ERGIC3 were set to PMID: 33710394; 31585110 Phenotypes for gene: ERGIC3 were set to Intellectual disability Review for gene: ERGIC3 was set to AMBER Added comment: PMID: 33710394 - two homozygous sibs with mild ID, a novel canonical splice (c.717+1G>A). Absent in gnomAD, no splice studies. Classed as a VUS. PMID: 31585110 - 1 hom (p.Gln233Argfs*10) in a male 8yo with Growth retardation, Microcephaly, Learning disability, Facial dysmorphism, Abnormal pigmentation. Sources: Literature |
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| Mendeliome v0.8186 | TTC26 |
Zornitza Stark changed review comment from: Seven families and functional data including zebrafish model. Sources: Literature; to: Nine families and functional data including zebrafish model. Sources: Literature |
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| Mendeliome v0.8079 | POPDC3 |
Zornitza Stark changed review comment from: 5 affected individuals from 3 unrelated families reported, supportive animal model data. Sources: Literature; to: 5 affected individuals from 3 unrelated families reported, supportive animal model data. Presentation was between adolescence and 40s with proximal muscle weakness primarily affecting the lower limbs, resulting in increased falls and difficulty running. The disorder was slowly progressive, with later involvement of the upper limbs. MRI showed fatty replacement of the thigh muscles and medial gastrocnemius, with some paraspinal muscles also affected. Some patients had calf hypertrophy. Serum CK was markedly elevated. Sources: Literature |
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| Mendeliome v0.7944 | SCN7A |
Zornitza Stark gene: SCN7A was added gene: SCN7A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SCN7A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SCN7A were set to 32732226 Phenotypes for gene: SCN7A were set to Holoprosencephaly Review for gene: SCN7A was set to RED Added comment: Novel candidate gene identified in a fetus with holoprosencephaly detected by ultrasound. Autopsy showed multiple congenital abnormalities including IUGR, microcephaly, bilateral, ablepharon, corpus callosum agenesis, myelomeningocele, tracheal atresia, absent nipples, unilateral simian crease, and hypoplastic phalanges. Compound heterozygous variants including a truncating variant were found by exome sequencing with concordant segregation. Sources: Literature |
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| Mendeliome v0.7509 | PTPN4 |
Bryony Thompson gene: PTPN4 was added gene: PTPN4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PTPN4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PTPN4 were set to 17953619; 25424712; 30238967; DOI: https://doi.org/10.1016/j.xhgg.2021.100033 Phenotypes for gene: PTPN4 were set to Intellectual disability; developmental delay Review for gene: PTPN4 was set to GREEN Added comment: >3 unrelated probands and supporting mouse model PMID: 17953619 - knockout mouse model has impaired motor learning and cerebellar synaptic plasticity PMID: 25424712 - twins with a de novo whole gene deletion and a Rett-like neurodevelopmental disorder PMID: 30238967 - mosaic de novo variant (p.Leu72Ser) identified in a child with developmental delay, autistic features, hypotonia, increased immunoglobulin E and dental problems. Also supporting mouse assays demonstrating loss of protein expression in dendritic spines DOI: https://doi.org/10.1016/j.xhgg.2021.100033 - missense and truncating variants in six unrelated individuals with varying degrees of intellectual disability or developmental delay. 5 were able to undergo segregation analysis and found to be de novo. Sources: Literature |
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| Mendeliome v0.7464 | VPS41 |
Kristin Rigbye changed review comment from: "Five unrelated families with nine affected individuals, all carrying homozygous variants in VPS41 that we show impact protein function. All affected individuals presented with a progressive neurodevelopmental disorder consisting of cognitive impairment, cerebellar atrophy/hypoplasia, motor dysfunction with ataxia and dystonia, and nystagmus. Zebrafish disease modelling supports the involvement of VPS41 dysfunction in the disorder, indicating lysosomal dysregulation throughout the brain and providing support for cerebellar and microglial abnormalities when vps41 was mutated. This provides the first example of human disease linked to the HOPS-specific subunit VPS41 and suggests the importance of HOPS complex activity for cerebellar function."; to: "Five unrelated families with nine affected individuals, all carrying homozygous variants in VPS41 that we show impact protein function. All affected individuals presented with a progressive neurodevelopmental disorder consisting of cognitive impairment, cerebellar atrophy/hypoplasia, motor dysfunction with ataxia and dystonia, and nystagmus. Zebrafish disease modelling supports the involvement of VPS41 dysfunction in the disorder, indicating lysosomal dysregulation throughout the brain and providing support for cerebellar and microglial abnormalities when vps41 was mutated. This provides the first example of human disease linked to the HOPS-specific subunit VPS41 and suggests the importance of HOPS complex activity for cerebellar function." "Affected individuals were born after uneventful pregnancies and presented in most cases early in life with developmental delay. Various degrees of ataxia, hypotonia, and dystonia were present in all affected individuals, preventing independent ambulation. Likewise, nystagmus was commonly described. In addition, all affected individuals displayed intellectual disability and speech delay. Two siblings further presented with therapy-resistant epilepsy. No major dysmorphic features were found. In two individuals, retinal pigment alterations were noticed. Brain MRI revealed mild cerebellar atrophy and vermian atrophy without other major structural abnormalities in most affected individuals while in one case (Subject 9) bilateral hyperintensities at the nucleus caudatus area were noted. No hearing or vision problems were noted and in cases where nerve conduction studies were performed, these were normal. Transmission electron microscopy (TEM) on peripheral blood lymphocytes from Subject 2 and lymphoblastoid cells from Subject 3 revealed more multilayered vesicles compared to control cells." |
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| Mendeliome v0.7464 | DPYSL5 |
Michelle Torres gene: DPYSL5 was added gene: DPYSL5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DPYSL5 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DPYSL5 were set to 33894126 Phenotypes for gene: DPYSL5 were set to Neurodevelopmental disorder with corpus callosum agenesis and cerebellar abnormalities Review for gene: DPYSL5 was set to GREEN Added comment: Nine individuals with brain malformations, including corpus callosum agenesis and/or posterior fossa abnormalities, associated with variable degrees of intellectual disability. The recurrent de novo p.Glu41Lys was found in eight unrelated patients, and a p.Gly47Arg variant was identified in one individual from the first family reported with Ritscher-Schinzel syndrome. Both impaired DPYSL5 function on dendritic outgrowth regulation by preventing the formation of the ternary complex with MAP2 and βIII-tubulin, ultimately leading to abnormal brain development Sources: Literature |
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| Mendeliome v0.7394 | CHST11 |
Zornitza Stark gene: CHST11 was added gene: CHST11 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: CHST11 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CHST11 were set to 26436107; 29514872 Phenotypes for gene: CHST11 were set to Osteochondrodysplasia, brachydactyly, and overlapping malformed digits, MIM# 618167 Review for gene: CHST11 was set to AMBER Added comment: Osteochondrodysplasia, brachydactyly, and overlapping malformed digits (OCBMD) is characterized by bilateral symmetric skeletal defects that primarily affect the limbs. Affected individuals have mild short stature due to shortening of the lower leg bones, as well as hand and foot malformations, predominantly brachydactyly and overlapping digits. Other skeletal defects include scoliosis, dislocated patellae and fibulae, and pectus excavatum. Two unrelated families reported, note one had a homozygous deletion. One family had 10 affected individuals. Sources: Expert Review |
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| Mendeliome v0.7358 | JMJD1C |
Zornitza Stark gene: JMJD1C was added gene: JMJD1C was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: JMJD1C was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: JMJD1C were set to 26181491; 32996679 Phenotypes for gene: JMJD1C were set to Intellectual disability Review for gene: JMJD1C was set to GREEN Added comment: Reported in ID cohort (with Rett-like phenotypic overlap) with supporting functional studies (PMID: 26181491). 7 individuals with rare variants identified, and variants demonstrated to be de novo in 2, one with a Rett-like phenotype and the other with ID. Functional study of the JMJD1C mutant Rett syndrome patient demonstrated that the altered protein had abnormal subcellular localization, diminished activity to demethylate the DNA damage-response protein MDC1, and reduced binding to MECP2. JMJD1C protein shown to be widely expressed in brain regions and that its depletion compromised dendritic activity. Splice-disrupting JMJD1C variant reported in association with learning disability and myoclonic epilepsy (PMID 32996679). Disruption of gene due to balanced translocation (PMID 33591602) implicated in autism spectrum disease phenotype. Sources: Expert Review |
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| Mendeliome v0.6846 | HDL2 |
Bryony Thompson STR: HDL2 was added STR: HDL2 was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: HDL2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: HDL2 were set to 20301701 Phenotypes for STR: HDL2 were set to Huntington disease-like 2 MIM#606438 Review for STR: HDL2 was set to GREEN STR: HDL2 was marked as clinically relevant Added comment: NM_001271604.2:c.431CTG[X] or NM_020655.4:c.382+760CTG[X] In an alternatively spliced exon, the repeat can be transcribed in both directions, leading to CUG (more common) or CAG (less common) repeat-containing transcripts. While a dominant RNA toxic effect may occur, the repeat expansion also reduces levels of the Junctophilin-3 protein Normal: ≤28 repeats Questionable significance: 29-39 repeats, mutable normal or reduced penetrance included Full penetrance: ≥40 repeats Sources: Expert list |
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| Mendeliome v0.6843 | DM2 |
Bryony Thompson STR: DM2 was added STR: DM2 was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: DM2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: DM2 were set to 20301639; 29325606 Phenotypes for STR: DM2 were set to Myotonic dystrophy 2 MIM#602668 Review for STR: DM2 was set to GREEN STR: DM2 was marked as clinically relevant Added comment: HGVS nomenclature: NM_003418.4:c.-14-833_-14-830[X] Toxic gain of function RNA expected mechanism of disease Normal: ≤30 uninterrupted CCTG repeats, 11-26 CCTG repeats with any GCTC or TCTG interruptions Unknown significance (normal vs. mutable): 27-29 CCTG repeats Mutable normal (premutation) alleles. ~30-~54 CCTG repeats Unknown significance (premutation vs pathogenic): ~55-74 CCTG repeats Pathogenic: ~75-11,000 CCTG repeats Sources: Expert list |
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| Mendeliome v0.6808 | SATB1 | Zornitza Stark commented on gene: SATB1: Developmental delay with dysmorphic facies and dental anomalies (DEFDA) is characterized by generally mild global developmental delay with variably impaired intellectual development, walking by 2 to 3 years, and slow language acquisition. The severity of the disorder ranges from moderate cognitive deficits to mild learning difficulties or behavioral abnormalities. Most patients have dysmorphic facial features, often with abnormal dentition and nonspecific visual defects, such as myopia, astigmatism, and strabismus. Although rare, involvement of other systems, such as skeletal, cardiac, and gastrointestinal, may be present. 12 individuals from 11 families reported (one inherited variant, affected parent). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6781 | SCA1 |
Bryony Thompson STR: SCA1 was added STR: SCA1 was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: SCA1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: SCA1 were set to 29325606; 20301363 Phenotypes for STR: SCA1 were set to Spinocerebellar ataxia 1 MIM#164400 STR: SCA1 was marked as clinically relevant Added comment: NM_000332.3:c.589_591CAG[X] Toxic protein aggregation is mechanism of disease Normal: ≤35 CAG repeats or 36-44 CAG repeats with CAT interruptions Mutable normal (intermediate): 36-38 CAG repeats without CAT interruptions Full-penetrance: ≥39 CAG repeats without CAT interruptions or ≥46 uninterrupted CAG repeats with CAT interruptions and additional CAGs Sources: Expert list |
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| Mendeliome v0.6768 | FAM57B |
Zornitza Stark gene: FAM57B was added gene: FAM57B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FAM57B was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: FAM57B were set to 33077892 Phenotypes for gene: FAM57B were set to Cone–rod dystrophy; Maculopathy Review for gene: FAM57B was set to GREEN Added comment: 4 patients with cone-rod dystrophy or maculopathy from 3 families, with LOF pathogenic variants in TLCD3B (ceramide synthase gene). Ceramide is a proapoptotic lipid as high levels of ceramides can lead to apoptosis of neuronal cells, including photoreceptors. Variants segregated with disease. TLCD3B showed high expression in the adult retina with higher expression in the macular than in the peripheral region. Tlcd3bKO/KO mice exhibited a significant reduction of the cone photoreceptor light responses, thinning of the outer nuclear layer, and loss of cone photoreceptors across the retina. Sources: Literature |
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| Mendeliome v0.6652 | YY1AP1 | Zornitza Stark commented on gene: YY1AP1: Grange syndrome: multiple arterial stenoses, severe early onset hypertension, fibromuscular dysplasia, variable penetrance of brachydactyly, syndactyly, bone fragility, and learning disabilities. Missense variant reported PMID: 31633303 with moyamoya like phenotype in adult case; fibroblasts suggest that the p.Pro360Leu variant decreases the stability of the YY1AP1 protein but most LOF. PMID: 30556293 non coding variants reported (intronic variants leading to aberrant splicing) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6589 | SIAH1 |
Arina Puzriakova gene: SIAH1 was added gene: SIAH1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SIAH1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: SIAH1 were set to 32430360 Phenotypes for gene: SIAH1 were set to Developmental delay; Infantile hypotonia; Dysmorphic features; Laryngomalacia Review for gene: SIAH1 was set to GREEN Added comment: - PMID: 32430360 (2021) - Five unrelated individuals with shared features of developmental delay, infantile hypotonia, dysmorphic features and laryngomalacia. All had speech delay and where cognitive assessment was age appropriate individuals exhibited learning difficulties. Trio WES revealed distinct de novo variants in SIAH1. In vitro assays demonstrated that SIAH1 mutants induce loss of Wnt stimulatory activity. Sources: Literature |
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| Mendeliome v0.6567 | EN1 |
Zornitza Stark changed review comment from: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. Sources: Literature; to: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. An additional fourth individual had cerebellar hypoplasia in addition to the skeletal phenotype, and a bi-allelic LoF variant. Sources: Literature |
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| Mendeliome v0.6566 | EN1 |
Zornitza Stark gene: EN1 was added gene: EN1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: EN1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: EN1 were set to 33568816 Phenotypes for gene: EN1 were set to ENDOVE syndrome, limb-only type, MIM# 619217 Review for gene: EN1 was set to GREEN Added comment: Three unrelated families reported (though two shown to be related by descent) with predominantly a skeletal phenotype comprising mesomelic shortening and deformation of the lower limbs due to severe hypoplasia of the tibia and fibula. This was accompanied by abnormalities of the digits of the hands and feet, with cutaneous and osseous syndactyly as well as dysplastic, missing, and/or volar nails. In addition, genitourinary anomalies were observed in some. Homozygous deletions identified in all, with the minimal deleted region being a 27-kb interval (chr2: 118,561,492-118,589,320) located approximately 300 kb upstream of the EN1 gene. Mouse model recapitulated the phenotype. Sources: Literature |
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| Mendeliome v0.6556 | ACSL5 |
Zornitza Stark gene: ACSL5 was added gene: ACSL5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ACSL5 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ACSL5 were set to 33191500 Phenotypes for gene: ACSL5 were set to severe FTT (no OMIM #) Review for gene: ACSL5 was set to RED Added comment: 6 individuals of a large consanguineous family presented in the neonatal period with recurrent vomiting and diarrhea, leading to severe FTT. Autozygosity mapping and WES identified homozygous variant (c.1358C>A:p.(Thr453Lys) in ACSL5. Segregated with affected individuals. Functional in vitro analysis of the ACSL5 variant by immunofluorescence, western blotting and enzyme assay suggested that Thr453Lys is a loss‐of‐function mutation without any remaining activity. Affected individuals were treated with total parenteral nutrition or medium‐chain triglyceride‐based formula restricted in long‐chain triglycerides. They responded well and follow up suggests that treatment is only required during early life. Sources: Literature |
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| Mendeliome v0.6526 | APOO |
Arina Puzriakova gene: APOO was added gene: APOO was added to Mendeliome. Sources: Literature Mode of inheritance for gene: APOO was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) Publications for gene: APOO were set to 32439808 Phenotypes for gene: APOO were set to Developmental delay; Lactic acidosis; Muscle weakness; Hypotonia; Repetitive infections; Cognitive impairment; Autistic behaviour Review for gene: APOO was set to RED Added comment: - PMID: 32439808 (2021) - Three generation family with c.350T>C variant in APOO, encoding a component of the MICOS complex which plays a role in maintaining inner mitochondrial membrane architecture. Phenotypes include fatigue and muscle weakness (6/8), learning difficulties and cognitive impairment (4/8), and increased blood lactate (2/8). Four individuals were asymptomatic carriers, including one male (authors indicate variability in female carriers was due to skewed X-inactivation, although skewing studies were inconclusive in some cases). Variability in clinical presentation suggests reduced penetrance or possible contribution of additional factors. Functional studies showed altered MICOS assembly and abnormalities in mitochondria ultrastructure in patient-derived fibroblasts. Knockdown studies in Drosophila and yeast demonstrated mitochondrial structural and functional deficiencies. Sources: Literature |
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| Mendeliome v0.6516 | PCBD1 | Zornitza Stark Phenotypes for gene: PCBD1 were changed from to Hyperphenylalaninemia, BH4-deficient, D, MIM# 264070 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6513 | PCBD1 | Zornitza Stark reviewed gene: PCBD1: Rating: GREEN; Mode of pathogenicity: None; Publications: 24204001; Phenotypes: Hyperphenylalaninemia, BH4-deficient, D, MIM# 264070; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6501 | PCBD1 |
Michelle Torres edited their review of gene: PCBD1: Added comment: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes. PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; Changed phenotypes: MODY, Hyperphenylalaninemia, BH4-deficient, D 264070 |
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| Mendeliome v0.6494 | PCBD1 |
Michelle Torres changed review comment from: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes. PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; to: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes. PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY |
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| Mendeliome v0.6490 | PCBD1 |
Michelle Torres changed review comment from: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes with features similar to dominantly inherited HNF1A-diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY; to: PMID: 24848070: one consanguineous family with early-onset nonautoimmune diabetes. The individual with early onset is biallelic, and 3 other carriers had later onset diabetes. In addition, 3 other patients with mild neonatal hyperphenylalaninemia with features similar to dominantly inherited HNF1A-diabetes. PMID: 24204001: 2 out 3 patients with hypomagnesemia and renal magnesium wasting associated to biallelic PCBD1 variants developed MODY |
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| Mendeliome v0.6294 | TDO2 |
Zornitza Stark gene: TDO2 was added gene: TDO2 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: TDO2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TDO2 were set to 28285122; 27604308 Phenotypes for gene: TDO2 were set to Hypertryptophanemia MIM#600627; Disorders of histidine, tryptophan or lysine metabolism Review for gene: TDO2 was set to RED Added comment: Single case reported, biochemical phenotype of hypertryptophanemia and hyperserotoninemia does not appear to have significant clinical consequences Sources: Expert list |
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| Mendeliome v0.6269 | GGT1 | Zornitza Stark Phenotypes for gene: GGT1 were changed from ?Glutathioninuria 231950 to Glutathioninuria 231950 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6265 | CTH | Zornitza Stark Phenotypes for gene: CTH were changed from to Cystathioninuria MIM#219500 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6261 | CTH | Zornitza Stark reviewed gene: CTH: Rating: AMBER; Mode of pathogenicity: None; Publications: 12574942, 20584029, 24761004, 15151507; Phenotypes: Cystathioninuria MIM#219500; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.6187 | BRWD1 |
Paul De Fazio gene: BRWD1 was added gene: BRWD1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: BRWD1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: BRWD1 were set to 33389130 Phenotypes for gene: BRWD1 were set to Asthenoteratozoospermia, likely primary ciliary dyskinesia Review for gene: BRWD1 was set to GREEN gene: BRWD1 was marked as current diagnostic Added comment: Biallelic missense variants reported in 3 unrelated individuals. Apart from asthenoteratozoospermia, all 3 had PCD or "PCD-likely" symptoms of re-occurring airway infections, bronchiectasis, and rhinosinusitis. One individual had situs inversus. Studies on cells from one indivdidual showed abnormal respiratory cilia structure. BRWD1 staining was absent from respiratory cilia in this individual (present in controls). Rated Green as there are three unrelated individuals reported. Sources: Literature |
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| Mendeliome v0.6149 | NOS1AP |
Zornitza Stark edited their review of gene: NOS1AP: Added comment: Nephrotic syndrome type 22 (NPHS22) is an autosomal recessive renal disease characterized by onset of progressive kidney dysfunction in infancy. Affected individuals usually present with edema associated with hypoproteinemia, proteinuria, and microscopic hematuria. Renal biopsy shows effacement of the podocyte foot processes, glomerulosclerosis, and thickening of the glomerular basement membrane. The disease is steroid-resistant and progressive, resulting in end-stage renal disease usually necessitating kidney transplant. Two unrelated families and animal model. No PMID yet: https://advances.sciencemag.org/content/7/1/eabe1386; Changed rating: GREEN; Changed phenotypes: Nephrotic syndrome, type 22, MIM# 619155; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal |
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| Mendeliome v0.6119 | FOXF1 |
Zornitza Stark changed review comment from: Congenital alveolar capillary dysplasia with misalignment of pulmonary veins (ACDMPV) is characterized histologically by failure of formation and ingrowth of alveolar capillaries that then do not make contact with alveolar epithelium, medial muscular thickening of small pulmonary arterioles with muscularization of the intraacinar arterioles, thickened alveolar walls, and anomalously situated pulmonary veins running alongside pulmonary arterioles and sharing the same adventitial sheath. Less common features include a reduced number of alveoli and a patchy distribution of the histopathologic changes. The disorder is associated with persistent pulmonary hypertension of the neonate and shows varying degrees of lability and severity. Affected infants present with respiratory distress resulting from pulmonary hypertension in the early postnatal period, and the disease is uniformly fatal within the newborn period. Additional features of ACDMPV include multiple congenital anomalies affecting the cardiovascular, gastrointestinal, genitourinary, and musculoskeletal systems, as well as disruption of the normal right-left asymmetry of intrathoracic or intraabdominal organs.; to: Congenital alveolar capillary dysplasia with misalignment of pulmonary veins (ACDMPV) is characterized histologically by failure of formation and ingrowth of alveolar capillaries that then do not make contact with alveolar epithelium, medial muscular thickening of small pulmonary arterioles with muscularization of the intraacinar arterioles, thickened alveolar walls, and anomalously situated pulmonary veins running alongside pulmonary arterioles and sharing the same adventitial sheath. Less common features include a reduced number of alveoli and a patchy distribution of the histopathologic changes. The disorder is associated with persistent pulmonary hypertension of the neonate and shows varying degrees of lability and severity. Affected infants present with respiratory distress resulting from pulmonary hypertension in the early postnatal period, and the disease is uniformly fatal within the newborn period. Additional features of ACDMPV include multiple congenital anomalies affecting the cardiovascular, gastrointestinal, genitourinary, and musculoskeletal systems, as well as disruption of the normal right-left asymmetry of intrathoracic or intraabdominal organs. Over 50 families reported. |
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| Mendeliome v0.6016 | FGF13 |
Zornitza Stark gene: FGF13 was added gene: FGF13 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FGF13 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: FGF13 were set to 33245860 Phenotypes for gene: FGF13 were set to Intellectual disability; epilepsy Mode of pathogenicity for gene: FGF13 was set to Other Review for gene: FGF13 was set to GREEN Added comment: Two sibling pairs and three unrelated males reported who presented in infancy with intractable focal seizures and severe developmental delay. The variants were located in the N-terminal domain of the A isoform of FGF13/FHF2 (FHF2A). The X-linked FHF2 gene (also known as FGF13) has alternative first exons which produce multiple protein isoforms that differ in their N-terminal sequence. The variants were located at highly conserved residues in the FHF2A inactivation particle that competes with the intrinsic fast inactivation mechanism of Nav channels. Functional characterization of mutant FHF2A co-expressed with wild-type Nav1.6 (SCN8A) revealed that mutant FHF2A proteins lost the ability to induce rapid-onset, long-term blockade of the channel while retaining pro-excitatory properties. These gain-of-function effects are likely to increase neuronal excitability consistent with the epileptic potential of FHF2 variants. Sources: Literature |
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| Mendeliome v0.6014 | SCUBE3 |
Zornitza Stark changed review comment from: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies. Sources: Literature; to: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies. Mouse model recapitulated phenotype. Sources: Literature |
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| Mendeliome v0.6014 | SCUBE3 |
Zornitza Stark gene: SCUBE3 was added gene: SCUBE3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SCUBE3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SCUBE3 were set to 33308444 Phenotypes for gene: SCUBE3 were set to Short stature; skeletal abnormalities; craniofacial abnormalities; dental anomalies Review for gene: SCUBE3 was set to GREEN Added comment: Eighteen affected individuals from nine unrelated families reported with a consistent phenotype characterised by reduced growth, skeletal features, distinctive craniofacial appearance, and dental anomalies. Sources: Literature |
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| Mendeliome v0.5577 | FBXO28 |
Zornitza Stark gene: FBXO28 was added gene: FBXO28 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FBXO28 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: FBXO28 were set to 33280099 Phenotypes for gene: FBXO28 were set to Developmental and epileptic encephalopathy Review for gene: FBXO28 was set to GREEN Added comment: Nine new individuals with FBXO28 pathogenic variants (four missense, including one recurrent, three nonsense, and one frameshift) and all 10 known cases reviewed to delineate the phenotypic spectrum. All had epilepsy and 9 of 10 had DEE, including infantile spasms (3) and a progressive myoclonic epilepsy (1). Median age at seizure onset was 22.5 months (range 8 months to 5 years). Nine of 10 patients had intellectual disability, which was profound in six of nine and severe in three of nine. Movement disorders occurred in eight of 10 patients, six of 10 had hypotonia, four of 10 had acquired microcephaly, and five of 10 had dysmorphic features. Sources: Literature |
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| Mendeliome v0.5553 | KDM4B |
Kristin Rigbye gene: KDM4B was added gene: KDM4B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KDM4B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KDM4B were set to PMID: 33232677 Phenotypes for gene: KDM4B were set to Global developmental delay, intellectual disability and neuroanatomical defects Review for gene: KDM4B was set to GREEN Added comment: Nine individuals with mono-allelic de novo or inherited variants in KDM4B. All individuals presented with dysmorphic features and global developmental delay (GDD) with language and motor skills most affected. Three individuals had a history of seizures, and four had anomalies on brain imaging ranging from agenesis of the corpus callosum with hydrocephalus to cystic formations, abnormal hippocampi, and polymicrogyria. In a knockout mouse the total brain volume was significantly reduced with decreased size of the hippocampal dentate gyrus, partial agenesis of the corpus callosum, and ventriculomegaly. Sources: Literature |
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| Mendeliome v0.5461 | LCP2 |
Zornitza Stark gene: LCP2 was added gene: LCP2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: LCP2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: LCP2 were set to 33231617 Phenotypes for gene: LCP2 were set to Severe combined immunodeficiency Review for gene: LCP2 was set to RED Added comment: Infant with bi-allelic variants in this gene and early-onset life-threatening infections, combined T and B cell immunodeficiency, severe neutrophil defects, and impaired platelet aggregation. Sources: Literature |
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| Mendeliome v0.5317 | UBA1 | Zornitza Stark edited their review of gene: UBA1: Added comment: Association with VEXAS: 25 men reported with somatic mutations affecting methionine-41 (p.Met41) in UBA1, the major E1 enzyme that initiates ubiquitylation, and an often fatal, treatment-refractory inflammatory syndrome develops in late adulthood, with fevers, cytopaenias, characteristic vacuoles in myeloid and erythroid precursor cells, dysplastic bone marrow, neutrophilic cutaneous and pulmonary inflammation, chondritis, and vasculitis.; Changed publications: 18179898, 32181232, 31932168, 29034082, 27699224, 26028276, 23518311, 33108101; Changed phenotypes: Spinal muscular atrophy, X-linked 2, infantile, MIM# 301830, Autoinflammatory disease, adult onset: VEXAS (vacuoles, E1 enzyme, X-linked, autoinflammatory, somatic) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.5272 | PRKG2 |
Arina Puzriakova gene: PRKG2 was added gene: PRKG2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRKG2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PRKG2 were set to 33106379 Phenotypes for gene: PRKG2 were set to Acromesomelic dysplasia Review for gene: PRKG2 was set to GREEN Added comment: - PMID: 33106379 (2020) - Distinct homozygous variants in PRKG2 identified in two unrelated individuals, both with a skeletal dysplasia associated with severe short stature due to acromesomelic limb shortening, brachydactyly, mild to moderate platyspondyly and progressively increasing metaphyseal alterations of the long bones. Functional studies showed both variants result in NMD and disrupt the downstream MAPK signalling pathway in response to FGF2. The role of cGKII, encoded by PRKG2, in skeletal growth has been established in several animal models (references provided in paper). Sources: Literature |
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| Mendeliome v0.5222 | MPP5 |
Konstantinos Varvagiannis gene: MPP5 was added gene: MPP5 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MPP5 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: MPP5 were set to 33073849 Phenotypes for gene: MPP5 were set to Global developmental delay; Intellectual disability; Delayed speech and language development; Developmental regression; Behavioral abnormality Penetrance for gene: MPP5 were set to unknown Review for gene: MPP5 was set to GREEN Added comment: Sterling et al (2020 - PMID: 33073849) provide information on the phenotype of 3 individuals with de novo MPP5 variants. Common features included global developmental delay, intellectual disability (3/3 - severe in 2/3), speech delay/regression (the latter in at least 2) and behavioral abnormalities. Variable other features were reported, among others microcephaly (1/3), abnormal vision (1/3 : CVI, retinal dystrophy, nystagmus), brain MRI abnormalities (2/3), late-onset seizures (1/3). These subjects displayed variable and non-specific dysmorphic features. All were investigated by exome sequencing (previous investigations not mentioned). One subject was found to harbor a de novo mosaic (5/25 reads) stopgain variant, further confirmed by Sanger sequencing [NM_022474.4:c.1555C>T - p.(Arg519Ter). The specific variant is reported once in gnomAD (1/251338). Two de novo missense variants were identified in the remaining individuals [c.1289A>G - p.Glu430Gly / c.974A>C - p.His325Pro). All variants had in silico predictions in favor of a deleterious effect (CADD score >24). The authors comment that MPP5 encodes an apical complex protein with asymmetric localization to the apical side of polarized cells. It is expressed in brain, peripheral nervous system and other tissues. MPP5 is a member of the membrane-associated guanylate kinase family of proteins (MAGUK p55 subfamily), determining cell polarity at tight junctions. Previous animal models suggest that complete Mpp5(Pals1) KO in mice leads to near absence of cerebral cortical neurons. Htz KO display reduction in size of cerebral cortex and hippocampus. The gene is expressed in proliferating cell populations of cerebellum and important for establishment cerebellar architecture. Conditional KO of Mpp5(Pals1) in retinal progenitor cells mimics the retinal pathology observed in LCA. [Several refs. provided] The authors studied a heterozygous CNS-specific Mpp5 KO mouse model. These mice presented microcephaly, decreased cerebellar volume and cortical thickness, decreased ependymal cells and Mpp5 at the apical surface of cortical vertrical zone. The proportion of cortical cells undergoing apoptotic cell death was increased. Mice displayed behavioral abnormalities (hyperactivity) and visual deficits, with ERG traces further suggesting retinal blindness. Overall the mouse model was thought to recapitulate the behavioral abnormalities observed in affected subjects as well as individual rare features such as microcephaly and abnormal vision. Haploinsufficiency (rather than a dominant negative effect) is favored as the underlying disease mechanism. This is also in line with a dose dependent effect observed in mice. Sources: Literature |
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| Mendeliome v0.5216 | SCYL1 | Zornitza Stark commented on gene: SCYL1: Autosomal recessive spinocerebellar ataxia-21 is a neurologic disorder characterized by onset of cerebellar ataxia associated with cerebellar atrophy in early childhood. Affected individuals also have recurrent episodes of liver failure in the first decade, resulting in chronic liver fibrosis, as well as later onset of a peripheral neuropathy. Mild learning disabilities may also occur. More than 5 unrelated families reported. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4998 | CSNK1G1 |
Zornitza Stark gene: CSNK1G1 was added gene: CSNK1G1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CSNK1G1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CSNK1G1 were set to 33009664 Phenotypes for gene: CSNK1G1 were set to Global developmental delay; Intellectual disability; Autism; Seizures Review for gene: CSNK1G1 was set to GREEN Added comment: Borderline Green/Amber rating. Gold et al (2020 - PMID: 33009664) report 5 individuals with CSNK1G1 variants, including updated information on a previously reported subject (Martin et al 2014 - PMID: 24463883). Features included DD (5/5) with associated expressive language delay, ASD (in at least 3/5), seizures (2/5), dysmorphic facial features (4/5 arched eyebrows, 3/5 prominent central incisors, 2/5 epicanthus) and limb anomalies (2/5 - proximally placed thumb, 5th f. clinodactyly, asymmetric overgrowth - the other individual had tapering fingers). GI problems were observed in 4/5. Two individuals had macrocephaly and one had microcephaly. There was no formal developmental assessment although ID might be implied in at least 3 individuals (p1: 20y - single words/regression in walking following a seizure episode, p2: 8y - first words at 5y, assistance to feed, dress and bathe, ASD, p4: 13y - regression, assistance to feed and dress). CSNK1G1 encodes the gamma-1 isoform of casein kinase 1, a protein involved in growth and cell morphogenesis. The gene has ubiquitous expression, incl. brain. As commented, in brain it regulates phosphorylation of NMDA receptors, playing a role in synaptic transmission (4 articles cited). One individual had a 1.2 kb deletion spanning exon 3 of CSNK1G1 [chr15:64550952-64552120 - GRCh37]. Parental samples were unavailable for this individual. Four individuals were found to harbor de novo CSNK1G1 variants [NM_022048.3: c.688C>T - p.(Arg230Trp) dn | c.1255C>T - p.(Gln419*) dn | c.1214+5G>A dn with in silico predictions in favor of splice disruption | c.419C>T - p.(Thr140Met) dn]. Arg230Trp is however present once in gnomAD. The stopgain variant is located in the last exon and predicted to skip NMD. There were no variant studies performed. The Drosophila gish gene encodes a CK1γ homolog with preferential expression in the mushroom body. Heterozygous and homozygous mutants exhibit impairment in memory retention, more severe in homozygous flies. gish was also identified as a seizure modifier in a fly epilepsy model (heterozygous para mt flies). Sources: Literature |
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| Mendeliome v0.4770 | NEMF |
Zornitza Stark changed review comment from: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration. Sources: Literature; to: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration. Single individual with de novo variant reported, postulated dominant negative effect. Evidence for mono allelic variants causing disease is limited. Sources: Literature |
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| Mendeliome v0.4747 | HPDL |
Zornitza Stark commented on gene: HPDL: 17 individuals from 13 families, with a spectrum of neurologic impairment ranging from a severe congenital form without any neurological development (n = 2/17, 12%) to infantile-onset presentations (n = 10/17, 59%) with moderate to severe neurodevelopmental issues, partly with a pathology reminiscent of mitochondrial disease (Leigh-like syndrome), to juvenile-onset spastic paraplegia (n = 5/17, 29%). Frequently observed clinical findings included chronic progression of neurological signs (n = 16/17, 94%), motor developmental delay (n = 12/17, 71%), intellectual impairment (n = 11/17, 65%), microcephaly (n = 9/16, 56%), and seizures/epilepsy (n = 9/17, 53%). Other relevant clinical findings were visual disturbances/strabismus (n = 9/17, 53%) and loss of developmental milestones (n = 6/17, 35%). Acute central respiratory failure leading to life-threatening events requiring partly mechanically assisted ventilation occurred in half of individuals with infantile presentation (n = 5/10, 50%), respectively one third of all individuals (n = 5/17, 29%). Demyelinating neuropathy was present in three individuals (n = 3/11, 27%), with reduced sensory nerve conduction velocity (NCV) in all and severely reduced motor NCV in one. |
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| Mendeliome v0.4520 | SLC12A2 |
Zornitza Stark edited their review of gene: SLC12A2: Added comment: Monoallelic : DD/ID was a feature in >= 6 individuals with monoallelic de novo SLC12A2. An individual with an exon 22 truncating variant was reported to have normal milestones and cognitive function. Exon 21 variants have been described in individuals with rather isolated hearing impairment (possibly some associated motor delay, but normal cognition). Hearing impairment was also reported in 2/6 patients with variants in other exons (1 missense / 1 frameshift). Biallelic : DD/ID was reported in at least 3 individuals in literature. Hearing impairment has been reported on 2 occasions (although this was not probably evaluated in all subjects). --- Monoallelic SLC12A2 mutations : ► Individuals with de novo mutations and developmental disorder were first identified by the DDD study (2017 - PMID: 28135719). 5 of them have been reported in detail by McNeill et al (below). ► McNeill et al (2020 - PMID: 32658972) report on 6 individuals with neurodevelopmental disorder due to de novo SLC12A2 mutation. All presented DD or ID ranging from mild to severe. ASD was reported in 3/6. Sensorineural hearing loss was a feature in 2/6 with the remaining having normal formal evaluations. Brain, cardiac and/or additional malformations were reported in a single individual. Following non-diagnostic prior work-up (CMA, FMR1 or other investigations) trio exome sequencing revealed missense (4/6) or truncating variants (2/6). Three additional individuals (incl. a father and his son) with missense variants in exon 21 (NM_001046.3 / p.Glu979Lys and p.Glu980Lys) presented with bilateral sensorineural hearing loss. Speech and/or motor delay reported in these cases were attributed to the hearing impairment/vestibular arreflexia (cognitive abilities not tested). SLC12A2 encodes sodium-potassium-chloride transporter 1 (also NKCC1). The GTEx project has identified 8 isoforms. In brain both exon 21-containing/deleted isoforms are expressed (cited Morita et al 2014 - PMID: 24695712). As the authors discuss, RNA-seq of the developing mouse cochlea suggests that the exon 21 containing isoform is the single transcript expressed. Evidence from RNA-seq data (BrainSpan project) and literature suggests that the significant amounts of exon 21 lacking isoforms in fetal brain compensate for the deleterious effects of exon 21 variants and explain the lack of NDD in relevant patients. Slc12a2 (NKCC1) null mouse model has demonstrated that the transporter plays a role in accumulation of the potassium rich endolymph in the inner ear, with NKCC1 absence causing sensorineural deafness and imbalance. Slc12a2 display cochlear malformations, loss of hair cells and hearing impairment (cited Delpire et al 1999 - PMID: 10369265). The brain phenotype has not been studied extensively, although loss of Slc12a2 has been shown to inhibit neurogenesis (cited: Magalhães and Rivera et al. - PMID: 27582690). Slc12a2 null zebrafish display a collapse of the otic vesicle and reduced endolymph (Abbas and Whitfield, 2009 - PMID: 19633174) relevant to the human hearing disorder. In vitro assessment of NKCC1 ion transporter function in Xenopus laevis, supported the deleterious effect of the identified variants (significant reduction in K+ influx). Using available single cell RNA-seq data the authors further demonstrated that SLC12A2 expressing cells display transcriptomic profiles reflective of active neurogenesis. ► Delpire et al (2016 - PMID: 27900370 - not reviewed in detail) described a 13 y.o. girl harboring a de novo 11-bp deletion in SLC12A2 exon 22. This individual reached developmental milestones on time and had a NORMAL cognitive function. Hearing was seemingly normal. Features included orthostatic intolerance, respiratory weakness, multiple endocrine abnormalities, pancreatic insufficiency and multiorgan failure incl. gut and bladder. Exome in the proband, parents and 3 unaffected sibs suggested SLC12A2 as the only candidate for her phenotype. Functional analyses in Xenopus laevis oocytes suggested that a non functional transporter was expressed and trafficked to the membrane as the wt. Detection of the truncated protein at higher molecular sizes suggested either enhanced dimerization or misfolded aggregate. There was no dominant-negative effect of mutant NKCC1. In patient fibroblasts a reduced total and NKCC1-mediated K+ influx. ► Mutai et al (2020 - PMID: 32294086) report on several individuals from 4 families, harboring variants within exon 21 or - in one case - at it's 3' splice-site (leading to skipping oe this exon at the mRNA level). All subjects were investigated for severe/profound hearing loss (in line with the role of exon 21-included isoforms in cochlea. The variant segregated with hearing impairment in 3 generations of a family while in all other subjects the variant had occured as de novo event. Despite motor delays (e.g. the subject from fam2 could not hold head or sit at the age of 10m / the proband in Fam3 was able to hold his head and walk at 6 and 20 m respectively) behavior and cognition were commented to be within normal range. ----- Biallelic SLC12A2 mutations: ► Anazi et al (2017 - PMID: 29288388) briefly reported on a 3 y.o. boy (17DG0776) with central hypotonia, neonatal respiratory distress, failure to thrive, global DD and microcephaly and a skeletal survey suggestive of osteopenia. After non-diagnostic prior investigations (CMA revealing a 1p duplication classified as VUS, extensive metabolic workup), WES revealed a homozygous SLC12A2 splicing variant [NM_001046.2:c.2617-2A>G]. ► Macnamara et al (2019 - PMID: 30740830) described a 5.5 y.o. male with sensorineural hearing loss, profound delays in all developmental areas among several other features (choanal atresia, failure to thrive, respiratory problems, absent sweat and tear production or salivation, GI abnormalities). Genetic testing for several disorders considered (cystic fibrosis, spinal muscular atrophy, sequencing and del/dup analysis of mtDNA) was normal. CMA revealed paternal uniparental isodisomy for chr. 5 and WGS a homozygous 22kb deletion in SLC12A2. This was followed by confirmation of homozygosity in the proband, heterozygosity of the unaffected father, delineation of breakpoints (chr5:127441491-127471419). mRNA studies in patient fibroblasts confirmed deletion of ex2-7, splicing of ex1 directly to ex8 and introduction of a premature stop codon in ex9. qRT-PCR confirmed that mRNA is likely subjected to NMD (expression ~80% of control). Western blot confirmed absence of the protein in the patient's fibroblasts. Again mouse models are thought to recapitulate the hearing defect but also the deficient saliva production (cited Evans et al 2000 - PMID: 10831596). Again the authors speculate a role of SLC12A2 in brain development based on evidence from murine models (migration, dendritic growth, increse in neuron density through regulation of GABAergic signalling (Young et al 2012 - PMID: 23015452). Hypotheses are also made on a regulatory relationship between NKCC1 and CFTR based on mRNA data from the ko mouse model. ► Stödberg et al (2020 - PMID: 32754646) reported 2 sibs with a complex neurodevelopmental disorder due to compound heterozygosity for a frameshift SLC12A2 variant and a splicing one (NM_001046:c.1431delT and c.2006-1G>A). Both presented hypotonia, neonatal S. aureus parotitis and respiratory problems (incl. apneas). While the older sib died at the age of 22 days, the younger one had persistent respiratory issues incl. a dry respiratory mucosa motivating metabolic, immunology investigations and testing for CF. She displayed microcephaly (OFC -2.5 SD, H was also -3.5SD), severe intellectual disability. MRI was suggestive of white matter and basal ganglia abnormalities. Other features incl. hearing impairment, and lack of tears,saliva and sweat, constipation and intestinal malrotation. There was facial dysmorphism. The variants were the only retained following WGS of the 2 affected sisters, parents and an unaffected brother. The splicing variant was shown to result in skipping of exon 13, while the indel in NMD. Again the authors discuss that the deficient saliva production, impaired hearing and GI problems are recapitulated in the mouse model (several refs provided).; Changed rating: GREEN; Changed publications: 28135719, 32658972, 27900370, 32294086, 29288388, 30740830, 32754646; Changed phenotypes: Kilquist syndrome, deafness, intellectual disability, dysmorphic features, absent salivation, ectodermal dysplasia, constipation, intestinal malrotation, multiple congenital anomalies; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal |
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| Mendeliome v0.4497 | NEMF |
Zornitza Stark gene: NEMF was added gene: NEMF was added to Mendeliome. Sources: Literature Mode of inheritance for gene: NEMF was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: NEMF were set to 32934225 Phenotypes for gene: NEMF were set to Intellectual disability; neuropathy Review for gene: NEMF was set to GREEN Added comment: Nine individuals from 7 unrelated families reported with a mixed CNS/PNS phenotype. 7/9 had ID, 4/9 had formal assessments demonstrating axonal neuropathy, 3/9 had ataxia; muscular atrophy, hypotonia, respiratory distress, scoliosis also described in some. Three independently generated mouse models had progressive motor neuron degeneration. Sources: Literature |
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| Mendeliome v0.4470 | GGT1 | Zornitza Stark Phenotypes for gene: GGT1 were changed from to ?Glutathioninuria 231950 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4466 | GGT1 |
Elena Savva edited their review of gene: GGT1: Added comment: PMID: 29483667 - 1 family (2 sibs) w/ a homozygous 16.9kb deletion spanning part of the gene and no others. Carrier parents were normal. PMID: 23615310 - homozygous mutant mouse model have dwarfism, cataracts and coat colour abnormalities. Protein activity reduced to 4% of wildtype. Noted it was for use as a GGT deficiency model. PMID: 31520399 - 2 families with AD inheritance showing GGT1 deficiency but NO clinical symptoms. Authors call GGTemia a benign condition.; Changed publications: PMID: 29483667, 23615310, 31520399 |
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| Mendeliome v0.4409 | GGT1 | Elena Savva reviewed gene: GGT1: Rating: RED; Mode of pathogenicity: None; Publications: PMID: 29483667, 23615310; Phenotypes: ?Glutathioninuria 231950; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4395 | SQSTM1 | Zornitza Stark changed review comment from: Four unrelated families, presenting feature of this progressive neurological disorder was ataxia.; to: Nine individuals from four unrelated families. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4355 | SOS1 | Zornitza Stark edited their review of gene: SOS1: Added comment: Over 50 individuals reported with SOS1 variants and a Noonan syndrome phenotype. Pulmonic stenosis tends to be more frequent compared to those with PTPN11 mutations, and atrial septal defect is relatively rare. Ectodermal features including keratosis pilaris and curly hair are significantly more prevalent compared with the general Noonan population. Height below the third percentile and learning disability are observed in fewer individuals compared with Noonan syndrome in general. In contrast, macrocephaly is overrepresented among those with SOS1 mutations.; Changed rating: GREEN; Changed mode of pathogenicity: Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments; Changed publications: 17143285, 17143282, 28884940, 17586837; Changed phenotypes: Noonan syndrome 4, MIM# 610733; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4309 | OCA2 |
Elena Savva changed review comment from: Single variant found causing AD OCA - p.G780S in two families (Lee, 2020) -> GOF suggested Complete penetrance for oculocutaneous albininism but variable expressivity (PMID: 24518832). No variable expressivity or incomplete penetrance reported in GeneReviews. Loss of function; to: Single variant found causing AD OCA - p.G780S in two families (Lee, 2020) -> GOF suggested Complete penetrance for oculocutaneous albininism but variable expressivity (PMID: 24518832). No variable expressivity or incomplete penetrance reported in GeneReviews. Loss of function 2.7kb deletion is very common in sub-Saharan African populations (GeneReviews) |
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| Mendeliome v0.4091 | CTNND1 | Eleanor Williams changed review comment from: PMID: 32196547 - Alharatani et al 2020 - report an expanded phenotype for CTNND1 patients. They report 13 individuals from nine families with novel protein-truncating variants in CTNND1 identified by WES. The mutations were not previously described in blepharocheilodontic (BCD), orofacial cleft cases nor in gnomAD. 8 patients had de novo variants, 2 inherited from affected parents, 2 participants inherited a variant from a parent with a mild phenotype. Additional phenotypic features seen include mild limb phenotypes (9/13), cardiovascular anomalies (6/13) and Developmental delay and other neurodevelopmental problems (8/13).; to: PMID: 32196547 - Alharatani et al 2020 - report an expanded phenotype for CTNND1 patients. They report 13 individuals from nine families with novel protein-truncating variants in CTNND1 identified by WES. The mutations were not previously described in blepharocheilodontic (BCD), orofacial cleft cases nor in gnomAD. 8 patients had de novo variants, 2 inherited from affected parents, 2 participants inherited a variant from a parent with a mild phenotype. 8/13 patients showed cleft palate Additional phenotypic features seen include mild limb phenotypes (9/13), cardiovascular anomalies (6/13) and Developmental delay and other neurodevelopmental problems (8/13). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4091 | ZFYVE19 |
Arina Puzriakova gene: ZFYVE19 was added gene: ZFYVE19 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZFYVE19 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZFYVE19 were set to 32737136 Phenotypes for gene: ZFYVE19 were set to Cholestasis Review for gene: ZFYVE19 was set to GREEN Added comment: PMID: 32737136 (2020) - Nine Han Chinese children from seven families with biallelic, predicted complete LoF variants in ZFYVE19. All patients had high-GGT intrahepatic cholestasis, portal hypertension, and histopathological features of the ductal plate malformation/congenital hepatic fibrosis. ZFYVE19 depletion in cultured cells from one patient yielded centriolar and axonemal abnormalities, and immunostaining for two ciliary proteins DCDC2 and ACALT showed abnormal localisation in patient cholangiocytes, indicating this as a novel ciliopathy disorder. Sources: Literature |
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| Mendeliome v0.3872 | LMBRD2 |
Zornitza Stark gene: LMBRD2 was added gene: LMBRD2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: LMBRD2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: LMBRD2 were set to 32820033; https://doi.org/10.1101/797787 Phenotypes for gene: LMBRD2 were set to Global developmental delay; Intellectual disability; Microcephaly; Seizures; Abnormality of nervous system morphology; Abnormality of the eye Mode of pathogenicity for gene: LMBRD2 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: LMBRD2 was set to GREEN Added comment: 13 individuals with dn missense SNVs overall, overlapping features for 10 with available phenotype / a recurring variant has been identified in 2 different studies. ► Malhotra et al (2020 - PMID: 32820033) report on 10 unrelated individuals with de novo missense LMBRD2 variants. Features included DD (9/10), ID (6/8 of relevant age), microcephaly (7/10), seizures (5/10 - >=3 different variants), structural brain abnormalities (e.g. thin CC in 6/9), highly variable ocular abnormalities (5/10) and dysmorphic features in some (7/10 - nonspecific). All had variable prior non-diagnostic genetic tests (CMA, gene panel, mendeliome, karyotype). WES/WGS revealed LMBRD2 missense variants, in all cases de novo. A single individual had additional variants with weaker evidence of pathogenicity. 5 unique missense SNVs and 2 recurrent ones (NM_001007527:c.367T>C - p.Trp123Arg / c.1448G>A - p.Arg483His) were identified. These occurred in different exons. Variants were not present in gnomAD and all had several in silico predictions in favor of a deleterious effect. There was phenotypic variability among individuals with the same variant (e.g. seizures in 1/3 and microchephaly in 2/3 of those harboring R483H). The gene has a pLI of 0 (although o/e ranges from 0.23 to 0.55), %HI of 15.13 and z-score of 2.27. The authors presume that haploinsufficiency may not apply, and consider a gain-of-function/dominant-negative effect more likely. As the authors comment LMBRD2 (LMBR1 domain containing 2) encodes a membrane bound protein with poorly described function. It is widely expressed across tissues with notable expression in human brain (also in Drosophila, or Xenopus laevis). It displays high interspecies conservation. It has been suggested (Paek et al - PMID: 28388415) that LMBRD2 is a potential regulator of β2 adrenoreceptor signalling through involvement in GPCR signalling. ► Kaplanis et al (2020 - https://doi.org/10.1101/797787) in a dataset of 31058 parent-offspring trios (WES) previously identified 3 individuals with developmental disorder, harboring c.1448G>A - p.Arg483His. These individuals (1 from the DDD study, and 2 GeneDx patients) appear in Decipher. [ https://decipher.sanger.ac.uk/ddd/research-variant/40e17c78cc9655a6721006fc1e0c98db/overview ]. The preprint by Kaplanis et al is cited by Malhotra et al, with Arg483His reported in 6 patients overall in both studies. Sources: Literature |
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| Mendeliome v0.3732 | FAM50A |
Zornitza Stark gene: FAM50A was added gene: FAM50A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FAM50A was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) Publications for gene: FAM50A were set to 32703943 Phenotypes for gene: FAM50A were set to Mental retardation syndrome, X-linked, Armfield type (MIM #300261) Review for gene: FAM50A was set to GREEN Added comment: Lee et al (2020 - PMID: 32703943) provide evidence that Armfield X-Linked intellectual disability syndrome is caused by monoallelic FAM50A pathogenic variants. The current review is based only on this reference. The authors provide clinical details on 6 affected individuals from 5 families. Features included postnatal growth delay, DD and ID (6/6 - also evident for those without formal IQ assesment), seizures (3/6 from 2 families), prominent forehead with presence of other facial features and variable head circumference (5th to >97th %le), ocular anomalies (5/6 - strabismus/nystagmus/Axenfeld-Rieger), cardiac (3/6 - ASD/Fallot) and genitourinary anomalies (3/6). In the first of these families (Armfield et al 1999 - PMID: 10398235), linkage analysis followed by additional studies (Sanger, NGS of 718 genes on chrX, X-exome NGS - several refs provided) allowed the identification of a FAM50A variant. Variants in other families were identified by singleton (1 fam) or trio-ES (3 fam). In affected individuals from 3 families, the variant had occurred de novo. Carrier females in the other families were unaffected (based on pedigrees and/or the original publication). XCI was rather biased in most obligate carrier females from the 1st family (although this ranged from 95:5 to 60:40). Missense variants were reported in all affected subjects incl. Trp206Gly, Asp255Gly, Asp255Asn (dn), Glu254Gly (dn), Arg273Trp (dn) (NM_004699.3). Previous studies have demonstrated that FAM50A has ubiquitous expression in human fetal and adult tissues (incl. brain in fetal ones). Immunostaining suggests a nuclear localization for the protein (NIH/3T3 cells). Comparison of protein levels in LCLs from affected males and controls did not demonstrate significant differences. Protein localization for 3 variants (transfection of COS-7 cells) was shown to be similar to wt. Complementation studies in zebrafish provided evidence that the identified variants confer partial loss of function (rescue of the morpholino phenotype with co-injection of wt but not mt mRNA). The zebrafish ko model seemed to recapitulate the abnormal development of cephalic structures and was indicative of diminished/defective neurogenesis. Transcriptional dysregulation was demonstrated in zebrafish (altered levels and mis-splicing). Upregulation of spliceosome effectors was demonstrated in ko zebrafish. Similarly, mRNA expression and splicing defects were demonstrated in LCLs from affected individuals. FAM50A pulldown followed by mass spectrometry in transfected HEK293T cells demonstrated enrichment of binding proteins involved in RNA processing and co-immunoprecipitation assays (transfected U-87 cells) suggested that FAM50A interacts with spliceosome U5 and C-complex proteins. Overall aberrant spliceosome C-complex function is suggested as the underlying pathogenetic mechanism. Several other neurodevelopmental syndromes are caused by variants in genes encoding C-complex affiliated proteins (incl. EFTUD2, EIF4A3, THOC2, etc.). Sources: Literature |
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| Mendeliome v0.3731 | ADK | Zornitza Stark Phenotypes for gene: ADK were changed from to Hypermethioninemia due to adenosine kinase deficiency, MIM# 614300 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3728 | ADK | Zornitza Stark reviewed gene: ADK: Rating: GREEN; Mode of pathogenicity: None; Publications: 21963049, 17120046; Phenotypes: Hypermethioninemia due to adenosine kinase deficiency, MIM# 614300; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.3631 | MAPK1 |
Zornitza Stark gene: MAPK1 was added gene: MAPK1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MAPK1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MAPK1 were set to 32721402 Phenotypes for gene: MAPK1 were set to Global developmental delay; Intellectual disability; Behavioral abnormality; Growth delay; Abnormality of the face; Abnormality of the neck; Abnormality of the cardiovascular system; Abnormality of the skin Review for gene: MAPK1 was set to GREEN Added comment: Motta et al (2020 - PMID: 32721402) report on 7 unrelated individuals harboring de novo missense MAPK1 pathogenic variants. The phenotype corresponded to a neurodevelopmental disorder and - as the authors comment - consistently included DD, ID , behavioral problems. Postnatal growth delay was observed in approximately half. Hypertelorism, ptosis, downslant of palpebral fissures, wide nasal bridge as low-set/posteriorly rotated ears were among the facial features observed (each in 3 or more subjects within this cohort). Together with short/webbed neck and abnormalities of skin (lentigines / CAL spots) and growth delay these led to clinical suspicion of Noonan s. or disorder of the same pathway in some. Congenital heart defects (ASD, mitral valve insufficiency, though not cardiomyopathy) occurred in 4/7. Bleeding diathesis and lymphedema were reported only once. MAPK1 encodes the mitogen-activated protein kinase 1 (also known as ERK2) a serine/threonine kinase of the RAS-RAF-MEK-(MAPK/)ERK pathway. MAPK1 de novo variants were identified in all individuals following trio exome sequencing (and extensive previous genetic investigations which were non-diagnostic). The distribution of variants, as well as in silico/vitro/vivo studies suggest a GoF effect (boosted signal through the MAPK cascade. MAPK signaling also upregulated in Noonan syndrome). Sources: Literature |
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| Mendeliome v0.3590 | GNPNAT1 |
Arina Puzriakova changed review comment from: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Sources: Literature; to: PMID: 32591345 (2020) - Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Additional cases required to validate pathogenicity of GNPNAT1. Sources: Literature |
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| Mendeliome v0.3590 | GNPNAT1 |
Arina Puzriakova gene: GNPNAT1 was added gene: GNPNAT1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: GNPNAT1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: GNPNAT1 were set to 32591345 Phenotypes for gene: GNPNAT1 were set to Rhizomelic skeletal dysplasia Review for gene: GNPNAT1 was set to RED Added comment: Four affected sibs from a consanguineous Pakistani family with skeletal dysplasia, characterised by severe short stature, rhizomelic shortening of the limbs, and metacarpal and metatarsal length irregularities in the hands and feet. WGS revealed a homozygous missense variant (c.226G>A; p.Glu76Lys) in GNPNAT1, which segregating with the phenotype. Gnpnat1 gene knockdown in primary rat chondrocytes decreased cellular proliferation and expression of chondrocyte differentiation markers, indicating the importance of Gnpnat1 for growth plate chondrocyte proliferation and differentiation. Sources: Literature |
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| Mendeliome v0.3539 | LARS |
Zornitza Stark Added comment: Comment when marking as ready: Lenz et al (2020 - PMID: 32699352) review the phenotype of 25 affected individuals from 15 families. Seizures occurred in 19/24 and were commonly associated with infections. Encephalopathic episodes (in 13 patients) accompanied by seizures up to status epilepticus occurred independently of hepatic decompensation. In addition 22/24 presented with neurodevelopmental delay. The authors comment that cognitive impairment was present in 13/17 individuals (mild-severe) whereas most presented with learning disabilities. These patients will most likely investigated for their liver disease (although presentation was highly variable and/or very mild in few). The gene encodes a cytoplasmic amino-acyl tRNA synthetase (ARS) with neurologic manifestations observed in almost all patients (and seizures / DD and ID common to other disorders due to mutations in other genes encoding for ARSs). Please note that the HGNC approved symbol for this gene is LARS1. |
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| Mendeliome v0.3327 | KIF21B |
Zornitza Stark gene: KIF21B was added gene: KIF21B was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: KIF21B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: KIF21B were set to 32415109 Phenotypes for gene: KIF21B were set to Global developmental delay; Intellectual disability; Abnormality of brain morphology; Microcephaly Mode of pathogenicity for gene: KIF21B was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: KIF21B was set to GREEN Added comment: Asselin et al (2020 - PMID: 32415109) report on 4 individuals with KIF21B pathogenic variants. DD/ID (borderline intellectual functioning to severe ID) was a feature in all. Variable other findings included brain malformations (CCA) and microcephaly. 3 missense variants and a 4-bp insertion were identified, in 3 cases as de novo events while in a single subject the variant was inherited from the father who was also affected. The authors provide evidence for a role of KIF21B in the regulation of processes involved in cortical development and deleterious effect of the missense variants impeding neuronal migration and kinesin autoinhibition. Phenotypes specific to variants (e.g. CCA or microcephaly) were recapitulated in animal models. Missense variants are thought to exert a gain-of-function effect. As commented on, the 4-bp duplication (/frameshift) variant might not be pathogenic. In blood sample from the respective individual, RT-qPCR analysis suggested that haploinsufficiency (NMD) applies. Although Kif21b haploinsufficiency in mice was shown to lead to impaired neuronal positioning, the gene might partially tolerate LoF variants as also suggested by 28 such variants in gnomAD. Homozygous Kif21b ko mice display severe morphological abnormalities, partial loss of commissural fibers, cognitive deficits and altered synaptic transmission (several refs to previous studies provided by the authors). Sources: Expert Review |
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| Mendeliome v0.3325 | TBC1D2B |
Zornitza Stark gene: TBC1D2B was added gene: TBC1D2B was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: TBC1D2B was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TBC1D2B were set to 32623794 Phenotypes for gene: TBC1D2B were set to Global developmental delay; Intellectual disability; Seizures; Gingival overgrowth; Behavioral abnormality; Abnormality of the mandible; Abnormality of brain morphology; Abnormality of the eye; Hearing abnormality Review for gene: TBC1D2B was set to GREEN Added comment: Harms et al (2020 - PMID: 32623794) report on 3 unrelated individuals with biallelic pLoF TBC1D2B variants. Features included cognitive impairment (mild ID in one case, regression at the age of 12y in another, hypotonia and delayed milestones in a third aged 8m), seizures (3/3 - variable age of onset) and/or gingival overgrowth (2/3 - prior to initiation of AEDs). Other findings included behavioral abnormalities, mandibular anomalies, abnormal brain imaging and ophthalmologic or (rarely) audiometric evaluations. All were born to non-consanguineous couples and additional investigations were performed in some. Variants were identified by WES or trio WGS, with Sanger confirmation/compatible segregation analyses. In line with the pLoF variants, mRNA studies in fibroblasts from 2 unrelated affected individuals demonstrated significantly reduced (~80-90%) TBC1C2D mRNA levels compared to controls, restored following cycloheximide treatment. Protein was absent in patient fibroblasts. TBC-domain containing GTPase activating proteins are known as key regulators of RAB GTPase activity. TBC1D2B was shown to colocalize with RAB5-positive endocytic vesicles. CRISPR/Cas9-mediated ko of TBC1D2B in HeLa cells suggested a role in EGF receptor endocytosis and decreased cell viability of TBC1D2B-deficient HeLa cells upon serum deprivation. Genes encoding other TBC domain-containg GTPase-activating proteins, e.g. TBC1D7 and TBC1D20, TBC1D24 are associated with recessive neurodevelopmental disorders (with ID and/or seizures) and the pathophysiological defect in TBC1D2B-related disorder (deficit in vesicle trafficking and/or cell survival) is proposed to be similar to that of TBC1D24. Sources: Expert Review |
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| Mendeliome v0.3323 | EXOC2 |
Zornitza Stark gene: EXOC2 was added gene: EXOC2 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: EXOC2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: EXOC2 were set to 32639540 Phenotypes for gene: EXOC2 were set to Global developmental delay; Intellectual disability; Abnormality of the face; Abnormality of brain morphology Review for gene: EXOC2 was set to AMBER Added comment: Van Bergen et al (2020 - PMID: 32639540) report on 3 individuals from 2 families, harboring biallelic EXOC2 mutations. Clinical presentation included DD, ID (severe in 2 subjects from fam1, borderline intellectual functioning in fam2), dysmorphic features and brain abnormalities. Cerebellar anomalies were common to all with a molar tooth sign observed in one (1/3). Other findings limited to subjects from one family included acquired microcephaly, congenital contractures, spastic quadriplegia (each observed 2/3). Previous investigations were in all cases non-diagnostic. WES identified biallelic EXOC2 mutations in all affected individuals. EXOC2 encodes an exocyst subunit. The latter is an octameric complex, component of the membrane transport machinery, required for tethering and fusion of vesicles at the plasma membrane. As discussed ,vesicle transport is important for the development of brain and the function of neurons and glia. Exocyst function is also important for delivery of Arl13b to the primary cilium (biallelic ARL13B mutations cause Joubert syndrome 8) and ciliogenesis. Affected subjects from a broader consanguineous family (fam1) were homozygous for a truncating variant. Fibroblast studies revealed mRNA levels compatible with NMD (further restored in presence of CHX) as well as reduced protein levels. The female belonging to the second non-consanguineous family was found to harbor 2 missense variants in trans configuration. An exocytosis defect was demonstrated in fibroblasts from individuals belonging to both families. Ciliogenesis appeared to be normal, however Arl13b localization/recruitment to the cilia was reduced compared with control cells with the defect rescued upon exogenous expression of wt EXOC2. Mutations in other genes encoding components of the exocyst complex have been previously reported in individuals with relevant phenotypes (e.g. EXOC8 in a boy with features of Joubert s. or EXOC4 in nephrotic syndrome). The authors discuss on the essential role of EXOC2 based on model organism studies (e.g. impaired neuronal membrane traffic, failure of neuronal polarization and neuromuscular junction expansion seen in Drosophila Sec5 (EXOC2) null mutants). Sources: Expert Review |
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| Mendeliome v0.3156 | AXL |
Bryony Thompson gene: AXL was added gene: AXL was added to Mendeliome. Sources: Literature Mode of inheritance for gene: AXL was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: AXL were set to 18787040; 24476074 Phenotypes for gene: AXL were set to Kallman syndrome; normosmic idiopathic hypogonadotropic hypogonadism Review for gene: AXL was set to AMBER Added comment: Axl null mice had delayed first oestrus and persistently abnormal oestrous cyclicality compared with wild-type controls. Only a single study reported screening human cases. In a screen of 104 probands with KS or nIHH, four heterozygous AXL mutations were identified in two KS and two nIHH unrelated subjects (two males and two females). Three of the variants appear to be too common in gnomAD v2.1 given the reported prevalence of KS reported in GeneReviews (1:30,000 in males and 1:125,000 in females): c.587-6C>T (normal splicing in RNA studies, NFE AF 0.0001472), p.Q361P (NFE 0.002560), p.L50F (AJ 0.004405). The other variant p.S202C (4 hets, 1 female in gnomAD v2.1) is rare enough in gnomAD for a dominant disorder. In vitro functional assays were conducted and p.S202C had an significant effect on function, but so did the more common variant p.Q361P. Sources: Literature |
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| Mendeliome v0.3010 | OTUD7A |
Zornitza Stark gene: OTUD7A was added gene: OTUD7A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: OTUD7A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: OTUD7A were set to 31997314 Phenotypes for gene: OTUD7A were set to Epileptic encephalopathy, no OMIM# yet Review for gene: OTUD7A was set to RED Added comment: One patient with severe global developmental delay, language impairment and epileptic encephalopathy. Homozygous OTUD7A missense variant (c.697C>T, p.Leu233Phe), predicted to alter an ultraconserved amino acid, lying within the OTU catalytic domain. Its subsequent segregation analysis revealed that the parents, presenting with learning disability, and brother were heterozygous carriers. Biochemical assays demonstrated that proteasome complex formation and function were significantly reduced in patient‐derived fibroblasts and in OTUD7A knockout HAP1 cell line. Gene lies in the chromosome 15q13.3 region. Heterozygous microdeletions of chromosome 15q13.3 show incomplete penetrance and are associated with a highly variable phenotype that may include intellectual disability, epilepsy, facial dysmorphism and digit anomalies. Sources: Literature |
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| Mendeliome v0.2996 | ARL13B | Zornitza Stark edited their review of gene: ARL13B: Added comment: Eight families reported in the literature. Many are homozygous missense variants in consanguineous families with no further supporting evidence, but sufficient number have functional evidence at protein level. Gene has appropriate tissue expression. Zebrafish model: curved tails and cystic kidneys. Hennin mouse model discovered in ENU mutagenesis screen: has polydactyly, ciliary defect, and much more severe neurological phenotype (neural tube defect).; Changed publications: 18674751, 25138100, 26092869, 27894351, 29255182, 17488627 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2926 | PAH | Elena Savva reviewed gene: PAH: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Phenylketonuria 261600, [Hyperphenylalaninemia, non-PKU mild] 261600; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2906 | SNRNP200 |
Ain Roesley changed review comment from: PMID: 31260034; more than 20 families reported with either de novo or AD with RP or retinal dystrophy (RD) PMID: 29320387; p.(Arg1090Gln) in a proband with RP from a consag family with unaffected het parents and sibling PMID: 23847139; p.(Pro1045Thr) homozygous in a patient with Leber congenital amaurosis (LCA) PMID: 31260034: p.(Arg545His) homozygous in a patient with RP with asymptomatic het parents and sister PMID: 27735924: in a patient with RP who is cHet for p.(Pro105Thr) in SNRNP200 and a 1.4Mb deletion spanning SNRNP200. Father is a carrier of the missense and is unaffected and the deletion was de novo; to: PMID: 31260034; more than 20 families reported with either de novo or AD with RP or retinal dystrophy (RD) PMID: 29320387; p.(Arg1090Gln) in a proband with RP from a consag family with unaffected het parents and sibling PMID: 23847139; p.(Pro1045Thr) homozygous in a patient with Leber congenital amaurosis (LCA) PMID: 31260034: p.(Arg545His) homozygous in a patient with RP with asymptomatic het parents and sister PMID: 27735924: in a patient with RP who is cHet for p.(Pro105Thr) in SNRNP200 and a 1.1Mb deletion spanning SNRNP200. Father is a carrier of the missense and is unaffected and the deletion was de novo |
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| Mendeliome v0.2906 | SNRNP200 |
Ain Roesley changed review comment from: PMID: 31260034; more than 20 families reported with either de novo or AD with RP or retinal dystrophy (RD) PMID: 29320387; p.(Arg1090Gln) in a proband with RP from a consag family with unaffected het parents and sibling PMID: 23847139; p.(Pro1045Thr) homozygous in a patient with Leber congenital amaurosis (LCA) PMID: 31260034: p.(Arg545His) homozygous in a patient with RP with asymptomatic het parents and sister PMID: 27735924: in a patient with RP who is cHet for p.(Pro105Thr) in SNRNP200 and a 1.1Mb deletion spanning SNRNP200. Father is a carrier of the missense and is unaffected and the deletion was de novo; to: PMID: 31260034; more than 20 families reported with either de novo or AD with RP or retinal dystrophy (RD) PMID: 29320387; p.(Arg1090Gln) in a proband with RP from a consag family with unaffected het parents and sibling PMID: 23847139; p.(Pro1045Thr) homozygous in a patient with Leber congenital amaurosis (LCA) PMID: 31260034: p.(Arg545His) homozygous in a patient with RP with asymptomatic het parents and sister PMID: 27735924: in a patient with RP who is cHet for p.(Pro105Thr) in SNRNP200 and a 1.4Mb deletion spanning SNRNP200. Father is a carrier of the missense and is unaffected and the deletion was de novo |
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| Mendeliome v0.2876 | KRAS | Zornitza Stark Phenotypes for gene: KRAS were changed from to Cardiofaciocutaneous syndrome 2 615278; Noonan syndrome 3 609942; RAS-associated autoimmune leukoproliferative disorder 614470; Schimmelpenning-Feuerstein-Mims syndrome, somatic mosaic 163200 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2861 | KRAS | Elena Savva reviewed gene: KRAS: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 23059812, 17056636; Phenotypes: Arteriovenous malformation of the brain, somatic 108010, Bladder cancer, somatic 109800, Breast cancer, somatic 114480, Cardiofaciocutaneous syndrome 2 615278, Gastric cancer, somatic 137215, Leukemia, acute myeloid 601626, . Lung cancer, somatic 211980, Noonan syndrome 3 609942, Pancreatic carcinoma, somatic 260350, RAS-associated autoimmune leukoproliferative disorder 614470, Schimmelpenning-Feuerstein-Mims syndrome, somatic mosaic 163200; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown; Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.2361 | PKDCC |
Paul De Fazio gene: PKDCC was added gene: PKDCC was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PKDCC was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PKDCC were set to PMID:30478137; 19097194 Phenotypes for gene: PKDCC were set to Dysmorphism; shortening of extremities Review for gene: PKDCC was set to AMBER gene: PKDCC was marked as current diagnostic Added comment: 2 ("apparently") unrelated individuals with homozygous LoF (1x nonsense, 1x canonical splice) variants reported. Their phenotype is similar to knockout mice. Sources: Literature |
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| Mendeliome v0.1890 | NEK10 |
Zornitza Stark gene: NEK10 was added gene: NEK10 was added to Mendeliome. Sources: NHS GMS Mode of inheritance for gene: NEK10 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: NEK10 were set to 31959991 Phenotypes for gene: NEK10 were set to Primary ciliary dyskinesia; bronchiectasis Review for gene: NEK10 was set to GREEN Added comment: Nine individuals from 5 unrelated families, some functional data. Sources: NHS GMS |
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| Mendeliome v0.1861 | PQBP1 | Zornitza Stark Phenotypes for gene: PQBP1 were changed from to Renpenning syndrome, MIM#309500 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1842 | PQBP1 | Elena Savva reviewed gene: PQBP1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID:31840929, 14634649, 20410308; Phenotypes: Renpenning syndrome; Mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males); Current diagnostic: yes | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1744 | SLC25A32 |
Zornitza Stark gene: SLC25A32 was added gene: SLC25A32 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: SLC25A32 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SLC25A32 were set to 26933868; 28443623 Phenotypes for gene: SLC25A32 were set to Exercise intolerance, riboflavin-responsive, MIM# 616839 Review for gene: SLC25A32 was set to GREEN Added comment: Two unrelated families reported with functional data. Muscle biopsy showed ragged-red fibers and lipid storage mainly in type I oxidative fibers, small type II fibers, and poor immunostaining for succinate dehydrogenase (FAD-dependent mitochondrial respiratory chain complex II). Oral supplementation with riboflavin led to dramatic improvement in the clinical and biologic abnormalities. Sources: Expert list |
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| Mendeliome v0.1727 | NADK2 |
Zornitza Stark gene: NADK2 was added gene: NADK2 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: NADK2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: NADK2 were set to 24847004; 29388319; 27940755 Phenotypes for gene: NADK2 were set to 2,4-dienoyl-CoA reductase deficiency, MIM# 616034 Review for gene: NADK2 was set to GREEN gene: NADK2 was marked as current diagnostic Added comment: Mitochondrial dysfunction resulting in severe neurologic and metabolic dysfunction beginning in early infancy reported in two individuals with confirmed variants in this gene. Another individual with homozygous hypomorphic start loss variant g.36241900 A>G p. Met1Val and milder phenotype reported (PMID:29388319). Sources: Expert list |
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| Mendeliome v0.1725 | ISCA1 |
Zornitza Stark gene: ISCA1 was added gene: ISCA1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: ISCA1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ISCA1 were set to 28356563; 32092383; 31016283; 30113620; 30105122 Phenotypes for gene: ISCA1 were set to Multiple mitochondrial dysfunctions syndrome 5, MIM# 617613 Review for gene: ISCA1 was set to GREEN gene: ISCA1 was marked as current diagnostic Added comment: Multiple unrelated families reported. Severe disorder characterised by progressive neurologic deterioration beginning in early infancy. Affected individuals have essentially no psychomotor development and have early-onset seizures with neurologic decline and spasticity. Brain imaging shows severe leukodystrophy with evidence of dys- or delayed myelination. Rat model results in early lethality. Founder variant c.259G > A, p.(Glu87Lys) reported in Indian families. Sources: Expert list |
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| Mendeliome v0.1596 | WFS1 | Zornitza Stark Phenotypes for gene: WFS1 were changed from to ?Cataract 41; Deafness, autosomal dominant 6/14/38; Wolfram syndrome, autosomal recessive 1; Wolfram-like syndrome, autosomal dominant; {Diabetes mellitus, noninsulin-dependent, association with} | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1590 | WFS1 | Teresa Zhao reviewed gene: WFS1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 25211237; Phenotypes: ?Cataract 41, Deafness, autosomal dominant 6/14/38, Wolfram syndrome 1, Wolfram-like syndrome, autosomal dominant, {Diabetes mellitus, noninsulin-dependent, association with}; Mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.1142 | CUX1 |
Zornitza Stark gene: CUX1 was added gene: CUX1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: CUX1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CUX1 were set to 25059644; 20510857; 30014507 Phenotypes for gene: CUX1 were set to Global developmental delay with or without impaired intellectual development, 618330 Review for gene: CUX1 was set to GREEN gene: CUX1 was marked as current diagnostic Added comment: Nine individuals from 7 families reported. Three individuals had normal intelligence at school age despite significant early developmental delay. Sources: Expert list |
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| Mendeliome v0.949 | MACF1 |
Zornitza Stark gene: MACF1 was added gene: MACF1 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: MACF1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MACF1 were set to 30471716 Phenotypes for gene: MACF1 were set to Lissencephaly 9 with complex brainstem malformation, MIM# 618325 Mode of pathogenicity for gene: MACF1 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: MACF1 was set to GREEN Added comment: Nine individuals (including a pair of twins) reported with de novo variants in this gene. Sources: Expert list |
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| Mendeliome v0.876 | CDH2 |
Zornitza Stark gene: CDH2 was added gene: CDH2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CDH2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CDH2 were set to 31585109 Phenotypes for gene: CDH2 were set to Intellectual disability; corpus callosum abnormalities; congenital abnormalities Review for gene: CDH2 was set to GREEN Added comment: Nine unrelated individuals reported with de novo variants in this gene. Sources: Literature |
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| Mendeliome v0.644 | EIF3F |
Zornitza Stark gene: EIF3F was added gene: EIF3F was added to Mendeliome_VCGS. Sources: Expert list Mode of inheritance for gene: EIF3F was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: EIF3F were set to 30409806 Phenotypes for gene: EIF3F were set to Mental retardation, autosomal recessive 67, MIM# 618295 Review for gene: EIF3F was set to GREEN Added comment: Nine individuals from 7 families reported, all homozygous for the same missense variant, p.(Phe232Val). This variant is present at 0.12% frequency in non-Finnish Europeans in gnomad (no homozygotes). Sources: Expert list |
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| Mendeliome v0.233 | BRSK2 |
Zornitza Stark gene: BRSK2 was added gene: BRSK2 was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: BRSK2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: BRSK2 were set to 30879638 Phenotypes for gene: BRSK2 were set to Intellectual disability; autism Review for gene: BRSK2 was set to GREEN Added comment: Nine unrelated individuals with heterozygous variants in this gene; six confirmed de novo (parents available). Sources: Literature |
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| Mendeliome v0.229 | BCL11B |
Zornitza Stark gene: BCL11B was added gene: BCL11B was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: BCL11B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: BCL11B were set to 29985992 Phenotypes for gene: BCL11B were set to Intellectual developmental disorder with dysmorphic facies, speech delay, and T-cell abnormalities, MIM# 618092 Review for gene: BCL11B was set to GREEN Added comment: Nine unrelated individuals, all but one with de novo variants in this gene and syndromic ID/immunodeficiency. Most variants located in the last exon (exon 4) and are predicted to escape nonsense-mediated mRNA decay. Sources: Literature |
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| Mendeliome v0.197 | NIN | Zornitza Stark Marked gene: NIN as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.197 | NIN | Zornitza Stark Gene: nin has been classified as Red List (Low Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.197 | NIN | Zornitza Stark Phenotypes for gene: NIN were changed from to Seckel syndrome 7, MIM#614851 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.196 | NIN | Zornitza Stark Publications for gene: NIN were set to | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.195 | NIN | Zornitza Stark Mode of inheritance for gene: NIN was changed from Unknown to BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.194 | NIN | Zornitza Stark Classified gene: NIN as Red List (low evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.194 | NIN | Zornitza Stark Gene: nin has been classified as Red List (Low Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.193 | NIN | Zornitza Stark reviewed gene: NIN: Rating: RED; Mode of pathogenicity: None; Publications: 22933543; Phenotypes: Seckel syndrome 7, MIM#614851; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.129 | DNAJC12 | Zornitza Stark Phenotypes for gene: DNAJC12 were changed from to Hyperphenylalaninemia, mild, non-BH4-deficient, MIM#617384 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.0 | NIN |
Zornitza Stark gene: NIN was added gene: NIN was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services Mode of inheritance for gene: NIN was set to Unknown |
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