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Mendeliome v1.1840 PRRX1 Melanie Marty changed review comment from: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708). Authors of the more recent publication on Craniosynostosis (PMID: 37154149) cast some doubt on the reports for Agnathia-otocephaly, possible explanations discussed are that this condition is AR and a 2nd hit was missed or another cause was not identified such as variants in OTX2.

> PMID: 7758948 generated a loss-of-function mutation in the mouse Pmx1 gene. Mice homozygous for the mutant allele died soon after birth and exhibited defects of skeletogenesis, which involved the loss or malformation of craniofacial, limb, and vertebral skeletal structures. ; to: Craniosynostosis (MONDO:0015469), PRRX1-related
> 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

Agnathia-otocephaly complex, MIM# 202650
>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708). Authors of the more recent publication on Craniosynostosis (PMID: 37154149) cast some doubt on the reports for Agnathia-otocephaly, possible explanations discussed are that this condition is AR and a 2nd hit was missed or another cause was not identified such as variants in OTX2.

> PMID: 7758948 generated a loss-of-function mutation in the mouse Pmx1 gene. Mice homozygous for the mutant allele died soon after birth and exhibited defects of skeletogenesis, which involved the loss or malformation of craniofacial, limb, and vertebral skeletal structures.
Mendeliome v1.1840 PRRX1 Melanie Marty changed review comment from: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708). Authors of the more recent publication on Craniosynostosis (PMID: 37154149) cast some doubt on the reports for Agnathia-otocephaly, possible explanations discussed are that this condition is AR and a 2nd hit was missed or another cause was not identified such as variants in OTX2.; to: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708). Authors of the more recent publication on Craniosynostosis (PMID: 37154149) cast some doubt on the reports for Agnathia-otocephaly, possible explanations discussed are that this condition is AR and a 2nd hit was missed or another cause was not identified such as variants in OTX2.

> PMID: 7758948 generated a loss-of-function mutation in the mouse Pmx1 gene. Mice homozygous for the mutant allele died soon after birth and exhibited defects of skeletogenesis, which involved the loss or malformation of craniofacial, limb, and vertebral skeletal structures.
Mendeliome v1.1840 PRRX1 Melanie Marty changed review comment from: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708).; to: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708). Authors of the more recent publication on Craniosynostosis (PMID: 37154149) cast some doubt on the reports for Agnathia-otocephaly, possible explanations discussed are that this condition is AR and a 2nd hit was missed or another cause was not identified such as variants in OTX2.
Mendeliome v1.1840 PRRX1 Melanie Marty changed review comment from: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doen't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708).; to: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doesn't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708).
Mendeliome v1.1840 PRRX1 Melanie Marty changed review comment from: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly don't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.


Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651); to: > 17 individuals with Craniosynostosis from 14 families had been found to have rare heterozygous variants in PRRX1, loss of function variants (PTCs, start loss and partial/full gene del) or missense variants affecting the homeodomain.
> These consisted of three de novo variants, but for the majority of cases the variant was inherited from an unaffected parent, yielding an estimate for the penetrance of craniosynostosis of 12.5%.
> These results were also supported by immunofluorescence analyses which showed that missense variants within the PRRX1 homeodomain cause abnormal nuclear localisation (PMID: 37154149)
> Authors discuss how the previous reports of agnathia-otocephaly doen't fit with this new evidence and they showed that a missense variant previously reported in a patient with agnathia-otocephaly p.(Phe113Leu) did not affect nuclear import.

Supporting evidence:
> Post-natal calvarial stem cells expressing Prrx1 have been shown to reside exclusively in the calvarial suture niche, suggesting a requirement for PRRX1 regarding suture patency during early development (PMID: 28366454)

>Prrx1 has been shown to be widely expressed within the mouse coronal suture (PMID: 34376651)

>Agnathia-otocephaly complex, 2 x missense variants (1 x het, 1 x hom) and 2 x frameshifts reported (het). The frameshift variants both occur in a poly A tract (PMID: 21294718, PMID: 22674740, PMID: 23444262, PMID: 22211708).
Mendeliome v1.1789 SHROOM4 Zornitza Stark Phenotypes for gene: SHROOM4 were changed from Stocco dos Santos X-linked mental retardation syndrome, 300434; Intellectual disability to Congenital anomaly of the kidney and urinary tracy (CAKUT), SHROOM4-related, MONDO:0019719; epilepsy, idiopathic generalised, SHROOM4-related, MONDO:0005579
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
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
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.
Mendeliome v1.1596 MMS19 Paul De Fazio gene: MMS19 was added
gene: MMS19 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MMS19 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MMS19 were set to 38411040
Phenotypes for gene: MMS19 were set to Neuromuscular disease, MMS19-related (MONDO:0019056)
Penetrance for gene: MMS19 were set to unknown
Review for gene: MMS19 was set to RED
gene: MMS19 was marked as current diagnostic
Added comment: Single patient reported with postnatal microcephaly, bilateral cataracts, failure to thrive, progressive spastic tetraparesis, scoliosis, myoclonic epilepsy and precocious puberty. Cerebral MRI at age 4 years showed pontocerebellar atrophy and white matter abnormalities. Patient died age 13 after recurrent respiratory tract infections. A homozygous in-frame deletion p.(Glu213del) was identified. Cell line studies supported pathogenicity of the variant. A zebrafish knockout model also showed a detrimental effect of Mms19 deficincy.
Sources: Literature
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
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
Mendeliome v1.1401 PPID Elena Savva gene: PPID was added
gene: PPID was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PPID was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: PPID were set to 37977818
Phenotypes for gene: PPID were set to Stutter disorder, (MONDO:0000723), PPID-related
Review for gene: PPID was set to RED
Added comment: PMID: 37977818 - a large family (10 affected confirmed to have the variant) with stuttering/language disorder and a het missense (p.(Pro270Ser)). Mouse K/I model showed microstructural changes in the corticospinal tract
Sources: Literature
Mendeliome v1.1330 LRRC23 Belinda Chong gene: LRRC23 was added
gene: LRRC23 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: LRRC23 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: LRRC23 were set to 37804054
Phenotypes for gene: LRRC23 were set to Non-syndromic male infertility due to sperm motility disorder MONDO:0017173
Review for gene: LRRC23 was set to RED
Added comment: PMID 37804054: A homozygous nonsense mutation in LRRC23 (c.376C>T: p. Arg126X) in an infertile AZS patient whose parents were consanguineous. We verified the adversity of this novel mutation because of its ability to disrupt LRRC23 synthesis and impair RSs integrity. Furthermore, we demonstrated an interaction between LRRC23 and RSPH3 in vitro, indicating that LCCR23 is associated with RS in humans. Meanwhile, the LRRC23-mutant patient had a good prognosis following intracytoplasmic sperm injection.
Sources: Literature
Mendeliome v1.1169 TRAC Zornitza Stark Tag technically challenging tag was added to gene: TRAC.
Mendeliome v1.1142 SOX11 Zornitza Stark Phenotypes for gene: SOX11 were changed from Coffin-Siris syndrome 9, MIM# 615866; Congenital abnormalities of the kidneys and urinary tract to Intellectual developmental disorder with microcephaly and with or without ocular malformations or hypogonadotropic hypogonadism, MIM# 615866; Congenital abnormalities of the kidneys and urinary tract
Mendeliome v1.1140 SOX11 Zornitza Stark edited their review of gene: SOX11: Changed phenotypes: Intellectual developmental disorder with microcephaly and with or without ocular malformations or hypogonadotropic hypogonadism, MIM# 615866, Congenital abnormalities of the kidneys and urinary tract
Mendeliome v1.1071 TBC1D31 Lilian Downie gene: TBC1D31 was added
gene: TBC1D31 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TBC1D31 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TBC1D31 were set to PMID: 37468454
Phenotypes for gene: TBC1D31 were set to congenital anomaly of kidney and urinary tract MONDO:0019719
Review for gene: TBC1D31 was set to RED
Added comment: Single paper with homozygous mutations in 3 sibs with CAKUT from consanguineous family
Sources: Literature
Mendeliome v1.1062 NAA30 Sarah Pantaleo gene: NAA30 was added
gene: NAA30 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NAA30 was set to Unknown
Publications for gene: NAA30 were set to PMID: 37387332
Penetrance for gene: NAA30 were set to unknown
Added comment: Report a de novo heterozygous NAA30 nonsense variant c.244C>T, p.(Gln82*) in a 5yo boy with GDD, ASD, hypotonia, seizures, tracheal cleft and recurrent respiratory infections. Seizures resolved after two weeks of life. Family history of ASD in older sister. Epilepsy in mother, childhood onset.

Biochemical studies performed to assess the functional impact of the premature stop codon on catalytic activity. The variant was found to completely disrupt N-terminal acetyltransferase activity using an in vitro acetylation assay.

Variant de novo, “in a gene sensitive to loss of heterozygosity”. Limitation of study - have not established whether this gene variant acts in a dominant or recessive manner.
Sources: Literature
Mendeliome v1.1038 PIP5K1C Zornitza Stark Phenotypes for gene: PIP5K1C were changed from Lethal congenital contractural syndrome 3, MIM# 611369 to Neurodevelopmental disorder and microcephaly, MONDO:0700092, PIP5K1C-related; Lethal congenital contractural syndrome 3, MIM# 611369
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 v1.989 NAA60 Chirag Patel gene: NAA60 was added
gene: NAA60 was added to Mendeliome. Sources: Other
Mode of inheritance for gene: NAA60 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: NAA60 were set to Basal ganglia calcification
Review for gene: NAA60 was set to GREEN
gene: NAA60 was marked as current diagnostic
Added comment: ESHG 2023:
10 individuals from 7 families with biallelic variants in NAA60 (missense and framshift).
All with primary brain calcification - 4/10 childhood onset (DD, ID), 6/10 adult onset (cerebellar and pyramidal dysfunction, dystonia, parkinsonism, cognitive impairment, psychiatric manifestations).

NAA60 catalyses N-terminal acetylation of transmembrane proteins and localises to Golgi apparatus. In vitro assay of variants showed reduced capacity of Nt acetylation. Fibroblast studies showed significantly reduced levels of phosphate importer (SLC20A2). Loss of function variants in SLC20A2 (~50% of PFBC cases) lead to increased extracellular phosphate (which is thought to lead to calcium deposits in brain).
Sources: Other
Mendeliome v1.978 DENND5B Chirag Patel gene: DENND5B was added
gene: DENND5B was added to Mendeliome. Sources: Other
Mode of inheritance for gene: DENND5B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes for gene: DENND5B were set to Neurodevelopmental disorder with white matter anomalies
Review for gene: DENND5B was set to GREEN
gene: DENND5B was marked as current diagnostic
Added comment: ESHG 2023:
7 patients/7 families with de novo DENND5B variants (6 missense, 1 splice)
DD/ID (mod/profound)(7/7), white matter anomalies (6/7) hypotonia, epilepsy (3/7)

DENND5B acts as:
-GEF for activation of RAB proteins which are involved in membrane trafficking and neurotransmitter release
-regulator of lipid absorption and homeostasis

Functional studies showed loss of expression of DENND5B in fibroblasts, abnormal vesicle trafficking, and impaired lipid uptake and intracellular distribution
Sources: Other
Mendeliome v1.962 NUDCD2 Ee Ming Wong gene: NUDCD2 was added
gene: NUDCD2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NUDCD2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NUDCD2 were set to 37272762
Phenotypes for gene: NUDCD2 were set to Multiple congenital anomalies (MONDO:0019042), NUDCD2-related
Penetrance for gene: NUDCD2 were set to unknown
Review for gene: NUDCD2 was set to AMBER
gene: NUDCD2 was marked as current diagnostic
Added comment: - Two unrelated probands, each biallelic for two variants in NUDCD2 (total 3x LoF variants, 1x missense variant)
- Immunoblotting of proteins extracted from the primary fibroblasts of one proband with 2x LoF variants demonstrated markedly reduced NUDCD2 levels compared to healthy individuals
Sources: Literature
Mendeliome v1.938 KLHL9 Bryony Thompson changed review comment from: A single German family reported in 2010, segregating a missense variant c.796T>C p.Leu95Phe. In vitro functional assays demonstrated the variant diminishes the binding of KLHL9 to Cul3.
Sources: Literature; to: A single German family reported in 2010, segregating a missense variant c.796T>C p.Leu95Phe. In vitro functional assays demonstrated the variant diminishes the binding of KLHL9 to Cul3.
Ankle flexion contracture is reported in a mouse model, but there are other significant features present in the homozygous animals too - https://www.mousephenotype.org/data/genes/MGI:2180122
Sources: Literature
Mendeliome v1.915 MOS Melanie Marty gene: MOS was added
gene: MOS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MOS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MOS were set to PMID: 34779126; PMID: 34997960; PMID: 36403623; PMID: 35670744
Phenotypes for gene: MOS were set to Early embryonic arrest and fragmentation; infertility
Review for gene: MOS was set to GREEN
Added comment: PMID: 34779126: 3 x females with infertility with biallelic MOS variants identified. Using oocyte-specific Erk1/2 knockout mice, they verified that MOS-ERK signal pathway inactivation in oocytes caused early embryonic arrest and fragmentation.

PMID: 34997960: 2 x females with biallelic MOS variants. Functional studies showed a reduction of protein for two of these variants (missense and frameshift). Functional studies also showed these variants reduced the ability of MOS to phosphorylate its downstream target, extracellular signal-regulated kinase 1/2.

PMID: 35670744 1 x additional family (twins) with infertility and abnormal oocyte morphology with large first polar body. Functional studies showed the MOS variants could not activate MEK1/2 and ERK1/2 in oocytes and HEK293 cells. In addition, functional studies also showed when compared with wild-type MOS, the MOS variants decreased the MOS protein level and attenuated the binding capacity with MEK1.

PMID: 36403623 1 x female with primary infertility, patient’s oocytes had a large polar body and poor embryonic development, hom missense variant in MOS identified.
Sources: Literature
Mendeliome v1.896 CHRM5 Elena Savva gene: CHRM5 was added
gene: CHRM5 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CHRM5 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CHRM5 were set to 37213061
Phenotypes for gene: CHRM5 were set to Congenital anomaly of kidney and urinary tract, (MONDO:0019719), CHRM5-related
Review for gene: CHRM5 was set to RED
Added comment: PMID: 37213061
- homozygous missense p.(Q184R) in a proband with neurogenic bladder and CAKUT. Additional features were small trabeculated urinary bladder, bilateral severe hydronephrosis, grade V VUR right, chronic kidney disease (stage 4).
- Radioligand binding experiments were inconclusive - the missense variant had no effect on receptor expression or binding affinity.
- ACh binding assay did show a 2-fold increase (borderline significant), but no effect in secondary messenger accumulation.
- Transfected CHO line showed no effect on receptor expression
- Described a mouse K/O as having a bladder overactivity

No hom PTCs in gnomAD
Sources: Literature
Mendeliome v1.878 ESAM Zornitza Stark Phenotypes for gene: ESAM were changed from Neurodevelopmental disorder (MONDO#0700092), ESAM-related to Neurodevelopmental disorder with intracranial haemorrhage, seizures, and spasticity, MIM# 620371
Mendeliome v1.877 ESAM Zornitza Stark reviewed gene: ESAM: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Neurodevelopmental disorder with intracranial haemorrhage, seizures, and spasticity, MIM# 620371; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v1.853 RARA Zornitza Stark commented on gene: RARA: PMID: 37086723 identified a recurrent, heterozygous de novo missense variant in the RARA gene - c.865G>A; (p.Gly289Arg) - in two unrelated individuals. The variant is absent from gnomAD, highly conserved, major grantham score (125) and is located in the hormone receptor domain (DECIPHER).

Both individuals had severe craniosynostosis (sagittal or bicoronal).

Other shared phenotypic features included:
- Limb anomalies (rocker-bottom feet, bowing of the legs, and short upper/lower limbs)
- Additional craniofacial manifestations(microtia, conductive hearing loss, ankyloglossia, esotropia, hypoplastic
nasal bones, and oligodontia)
- Other additional anomalies included renal dysplasia with cysts, tracheomalacia, pulmonary arterial hypertension, developmental delays, hypotonia, cryptorchidism, seizures and adrenal insufficiency.

The authors postulate a gain of function mechanism. No functional studies provided. The gene encodes the retinoic acid receptor. Overlapping phenotypic features in these 2 affected individuals with retinoic acid embryopathy noted by the authors.
Mendeliome v1.850 RARA Zornitza Stark edited their review of gene: RARA: Added comment: PMID: 37086723 identified a recurrent, heterozygous de novo missense variant in the RARA gene - c.865G>A; (p.Gly289Arg) - in two unrelated individuals. The variant is absent from gnomAD, highly conserved, major grantham score (125) and is located in the hormone receptor domain (DECIPHER).

Both individuals had severe craniosynostosis (sagittal or bicoronal).

Other shared phenotypic features included:
- Limb anomalies (rocker-bottom feet, bowing of the legs, and short upper/lower limbs)
- Additional craniofacial manifestations(microtia, conductive hearing loss, ankyloglossia, esotropia, hypoplastic
nasal bones, and oligodontia)
- Other additional anomalies included renal dysplasia with cysts, tracheomalacia, pulmonary arterial hypertension, developmental delays, hypotonia, cryptorchidism, seizures and adrenal insufficiency.

The authors postulate a gain of function mechanism. No functional studies provided. The gene encodes the retinoic acid receptor. Overlapping phenotypic features in these 2 affected individuals with retinoic acid embryopathy noted by the authors.; Changed rating: AMBER; Changed publications: 31343737, 37086723; Changed phenotypes: Craniosynostosis - MONDO:0015469, Syndromic chorioretinal coloboma; Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v1.776 ACTC1 Lilian Downie gene: ACTC1 was added
gene: ACTC1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ACTC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ACTC1 were set to PMID: 36945405
Phenotypes for gene: ACTC1 were set to Atrial septal defect 5 MIM#612794; Cardiomyopathy, dilated, 1R MIM#613424; Cardiomyopathy, hypertrophic, 11 MIM#612098; ACTC1 related distal arthrogryposis MONDO:0019942
Review for gene: ACTC1 was set to GREEN
Added comment: ClinGen definitive association with HCM, moderate for DCM
5 new families (8 individuals) with a distral arthrogryposis phenotype (PMID: 36945405)
multiple congenital contractures, neck pterygia, scoliosis, and congenital heart defects/cardiomyopathy
facial features: microretrognathia, ptosis, downslanting palpebral fissures, low-set ears, and a long nasal bridge
All missense variants
Sources: Literature
Mendeliome v1.768 FILIP1 Paul De Fazio gene: FILIP1 was added
gene: FILIP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: FILIP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FILIP1 were set to 36943452
Phenotypes for gene: FILIP1 were set to Arthrogryposis multiplex congenita MONDO:0015168
Penetrance for gene: FILIP1 were set to unknown
Review for gene: FILIP1 was set to GREEN
gene: FILIP1 was marked as current diagnostic
Added comment: 3 families, all consanguineous, reported with 3 different homozygous loss of function variants (2x NMD-predicted nonsense, 1x intragenic deletion of exons 3-6 of 6). In one family, the variant segregated in 3 affected siblings.

Phenotypes consist of congenital contractures affecting shoulder, elbow, hand, hip, knee and foot as well as scoliosis, reduced palmar and plantar skin folds, microcephaly (-1.5 to -4 SD), and facial dysmorphism.
Sources: Literature
Mendeliome v1.717 RBSN Zornitza Stark gene: RBSN was added
gene: RBSN was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: RBSN was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: RBSN were set to 25233840; 29784638; 35652444
Phenotypes for gene: RBSN were set to intellectual disability, MONDO:0001071, RBSN-related
Review for gene: RBSN was set to GREEN
Added comment: Four unrelated families reported, consistent feature is ID.

PMID:25233840 reported a 6.5 year old female patient with a homozygous missense variant c.1273G > A (p.Gly425Arg) and her clinical presentation included intractable seizures, developmental delay, microcephaly, dysostosis, osteopenia, craniofacial dysmorphism, macrocytosis and megaloblastoid erythropoiesis.

PMID:29784638 reported three siblings with homozygous variant c.289G>C (p.Gly97Arg) in RBSN. The proband presented global developmental delay, had complete 46,XY male-to-female sex reversal and died at age 20 months after multiple infections. The other 2 affected siblings underwent unrelated-donor bone marrow or stem cell transplantation at 8 and 6.5 months of age, respectively. Both have severe intellectual disability and are nonambulatory and nonverbal.

PMID:35652444 reported two unrelated families (three siblings from a family of Iranian descent identified with homozygous variant c.547G>A (p.Gly183Arg) and four members from a family of indigenous Cree descent identified with homozygous variant c.538C>G (p.Arg180Gly)) with overlapping phenotypes including developmental delay, intellectual disability, distal motor axonal neuropathy and facial dysmorphism.
Sources: Literature
Mendeliome v1.661 THSD1 Zornitza Stark Phenotypes for gene: THSD1 were changed from Aneurysm, intracranial berry, 12 , MIM# 618734; Hydrops fetalis MONDO:0015193, THSD1-related to Aneurysm, intracranial berry, 12 , MIM# 618734; Lymphatic malformation 13, MIM# 620244
Mendeliome v1.632 CAMLG Manny Jacobs gene: CAMLG was added
gene: CAMLG was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CAMLG was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CAMLG were set to PMID: 35262690
Phenotypes for gene: CAMLG were set to Congenital disorder of glycosylation type IIz, 620201
Penetrance for gene: CAMLG were set to unknown
Review for gene: CAMLG was set to RED
Added comment: PMID: 35262690 (2022)
Report one patient with hom splice variant. No other reported patients.
GDD, seizures, contractures, hypotonia and brain malformations.
Sources: Literature
Mendeliome v1.626 THBS1 Zornitza Stark gene: THBS1 was added
gene: THBS1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: THBS1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: THBS1 were set to 36453543
Phenotypes for gene: THBS1 were set to Congenital glaucoma MONDO:0020366, THBS1-related
Review for gene: THBS1 was set to GREEN
Added comment: Missense alleles altering p.Arg1034, a highly evolutionarily conserved amino acid, in 3 unrelated and ethnically diverse families affected by congenital glaucoma.

Thbs1R1034C-mutant mice had elevated intraocular pressure (IOP), reduced ocular fluid outflow, and retinal ganglion cell loss. Histology revealed an abundant, abnormal extracellular accumulation of THBS1 with abnormal morphology of juxtacanalicular trabecular meshwork (TM), an ocular tissue critical for aqueous fluid outflow. Functional characterization showed that the THBS1 missense alleles found in affected individuals destabilized the THBS1 C-terminus, causing protein misfolding and extracellular aggregation. Analysis using a range of amino acid substitutions at position R1034 showed that the extent of aggregation was correlated with the change in protein-folding free energy caused by variations in amino acid structure.
Sources: Literature
Mendeliome v1.541 TNNC2 Zornitza Stark gene: TNNC2 was added
gene: TNNC2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TNNC2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TNNC2 were set to 33755597
Phenotypes for gene: TNNC2 were set to Congenital myopathy, MONDO:0019952, TNNC2-related
Review for gene: TNNC2 was set to GREEN
Added comment: Two families reported: Family 1: 4 individuals, three generations; missense variant p.(Asp34Tyr) Family 2: de novo variant, missense p.(Met79Ile)

Physiological studies in myofibers isolated from patients’ biopsies revealed a markedly reduced force response of the sarcomeres to [Ca2+]. This pathomechanism was further confirmed in experiments in which contractile dysfunction was evoked by replacing TnC in myofibers from healthy control subjects with recombinant, mutant TnC. Conversely, the contractile dysfunction of myofibers from patients was repaired by replacing endogenous, mutant TnC with recombinant, wild-type TnC.

Borderline Green: sufficient segregation in Fam 1 plus de novo status in Fam 2, plus functional data.
Sources: Literature
Mendeliome v1.507 GABRA3 Sarah Pantaleo gene: GABRA3 was added
gene: GABRA3 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GABRA3 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: GABRA3 were set to PMID: 29053855
Phenotypes for gene: GABRA3 were set to Epilepsy, intellectual disability, dysmorphic features,
Penetrance for gene: GABRA3 were set to Incomplete
Review for gene: GABRA3 was set to GREEN
Added comment: Six variants in GABRA3 encoding the alpha3-subunit of the GABA(A) receptor.
Five missense variants and one micro duplication were detected in four families and two sporadic cases presenting with a range of epileptic seizure types, a varying degree of intellectual disability and developmental delay, sometimes with dysmorphic features or nystagmus.
The variants co-segregated mostly but not completely with the phenotype in the families, indicating in some cases incomplete penetrance, involvement of other genes, or presence of phenocopies.
Overall, males were more severely affected and there were three asymptomatic female mutation carriers compared to only one male without a clinical phenotype.
Mechanism suggested - three detected missense variants are localised in the extracellular GABA-binding NH2-terminus, one in the M2-M3 linker and one in the M4 transmembrane segment of the alpha3-subunit. Functional studies in Xenopus leaves oocytes revealed a variable but significant reduction of GABA-evoked anion currents for all mutants compared to wild-type receptors. The degree of current reduction correlated partially with the phenotype.
Results reveal that rare loss-of-function variants in GABRA3 increase the risk for a varying combination of epilepsy, intellectual disability/developmental delay and dysmorphic features, presenting in some pedigrees with an X-linked inheritance pattern.
Sources: Literature
Mendeliome v1.504 SHROOM4 Alison Yeung reviewed gene: SHROOM4: Rating: GREEN; Mode of pathogenicity: None; Publications: 36379543, 35663265; Phenotypes: Congenital anomaly of the kidney and urinary tracy (CAKUT), SHROOM4-related, MONDO:0019719, epilepsy, idiopathic generalised, SHROOM4-related, MONDO:0005579; Mode of inheritance: X-LINKED: hemizygous mutation in males, biallelic mutations in females
Mendeliome v1.477 CLEC3B Chirag Patel gene: CLEC3B was added
gene: CLEC3B was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CLEC3B was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CLEC3B were set to PMID: 35331648
Phenotypes for gene: CLEC3B were set to Macular dystrophy, retinal, 4, OMIM #619977
Review for gene: CLEC3B was set to GREEN
Added comment: 12 affected individuals from 5 multigenerational Japanese families in a small village in Miyazaki diagnosed with autosomal dominant maculoretinopathy. WES identified a pathogenic variant (p.Ala180Asp) in CLEC3B, which encodes tetranectin, a plasminogen kringle-4 binding protein. Variant cosegregated with the ocular phenotype.

Mice that received subretinal injections with CLEC3B variant displayed multiple subretinal hyperreflective deposits, reduced retinal thickness, and decreased electroretinographic responses. The optokinetic tracking response indicated that spatial frequency was significantly lower (P < .05), implying impaired visual function in the mice.
Sources: Literature
Mendeliome v1.403 ARNT2 Bryony Thompson gene: ARNT2 was added
gene: ARNT2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ARNT2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ARNT2 were set to 11381139; 24022475
Phenotypes for gene: ARNT2 were set to Webb-Dattani syndrome MONDO:0014404
Review for gene: ARNT2 was set to AMBER
Added comment: A homozygous frameshift (c.1373_1374dupTC) in six affected children from a highly consanguineous family with a syndromic phenotype including microcephaly with fronto-temporal lobe hypoplasia, multiple pituitary hormone deficiency, seizures, severe visual impairment and abnormalities of the kidneys and urinary tract. In a Arnt2(-/-) mouse model embryos die perinatally and exhibit impaired hypothalamic development.
Sources: Literature
Mendeliome v1.366 MED11 Ain Roesley gene: MED11 was added
gene: MED11 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MED11 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MED11 were set to 36001086
Phenotypes for gene: MED11 were set to neurodevelopmental disorder MONDO#0700092, MED11-related
Review for gene: MED11 was set to GREEN
gene: MED11 was marked as current diagnostic
Added comment: 7 affected from 5 families (3x consang) with the same recurrent variant of p.(Arg109*).

Protein truncating, NOT NMD as proven by RT-PCR and western blot. Zebrafish knockout model recapitulates key clinical phenotypes

NO evidence of founder effect from haplotype analysis

7/7 cerebral dysgyria, cortical atrophy
5/7 limb contracture
4/7 epilepsy
3/7 families with IUGR
3/7 GDD
3/7 hearing loss
3/7 undescended testis
2/7 nystagmus
1/7 congenital cataract
Sources: Literature
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.
Mendeliome v1.276 ADAMTS15 Naomi Baker changed review comment from: PMID: 35962790; Four different homozygous variants identified in five affected individuals from four unrelated consanguineous families presenting with congenital flexion contractures of the interphalangeal joints and hypoplastic or absent palmar creases. All patients also had a mild appearance of fetal finger pads and clinodactyly of the fifth finger. Other reported phenotypes include: ontractures of knee, Achilles tendon, and ankle (4/5), spine involvement (kyphoscoliosis and/or spinal stiffness) (4/5), and orthodontic features (small mouth, dental crowding, missing teeth, or arched palate) (4/5).
Sources: Literature; to: PMID: 35962790; Four different homozygous variants identified in five affected individuals from four unrelated consanguineous families presenting with congenital flexion contractures of the interphalangeal joints and hypoplastic or absent palmar creases. All patients also had a mild appearance of fetal finger pads and clinodactyly of the fifth finger. Other reported phenotypes include: contractures of knee, Achilles tendon, and ankle (4/5), spine involvement (kyphoscoliosis and/or spinal stiffness) (4/5), and orthodontic features (small mouth, dental crowding, missing teeth, or arched palate) (4/5).
Sources: Literature
Mendeliome v1.276 ADAMTS15 Naomi Baker gene: ADAMTS15 was added
gene: ADAMTS15 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ADAMTS15 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADAMTS15 were set to PMID: 35962790
Phenotypes for gene: ADAMTS15 were set to Arthrogryposis (MONDO:0008779), ADMATS15-related
Review for gene: ADAMTS15 was set to GREEN
Added comment: PMID: 35962790; Four different homozygous variants identified in five affected individuals from four unrelated consanguineous families presenting with congenital flexion contractures of the interphalangeal joints and hypoplastic or absent palmar creases. All patients also had a mild appearance of fetal finger pads and clinodactyly of the fifth finger. Other reported phenotypes include: ontractures of knee, Achilles tendon, and ankle (4/5), spine involvement (kyphoscoliosis and/or spinal stiffness) (4/5), and orthodontic features (small mouth, dental crowding, missing teeth, or arched palate) (4/5).
Sources: Literature
Mendeliome v1.252 FOCAD Zornitza Stark gene: FOCAD was added
gene: FOCAD was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: FOCAD was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FOCAD were set to 35864190
Phenotypes for gene: FOCAD were set to Liver disease, severe congenital, MIM# 619991
Review for gene: FOCAD was set to GREEN
Added comment: Moreno Traspas et al 2022 reported 14 children from ten unrelated families with syndromic form of pediatric liver cirrhosis. Genome/exome sequencing analysis reveled biallelic variants in the FOCAD gene. Most of the mutations were nonsense, frameshift, or splice site alterations, predicted to result in a loss of function, but there were also 3 missense variants at highly conserved residues. Western blot analysis of dermal fibroblasts derived from 2 patients showed near absent FOCAD expression in cellular extracts. There were also decreased levels of the SKIC2 protein, suggesting that FOCAD may contribute to the stability of RNA helicase (OMIM: 619991).
Sources: Expert Review
Mendeliome v1.246 TRAC Zornitza Stark Tag founder tag was added to gene: TRAC.
Mendeliome v1.246 TRAC Seb Lunke Classified gene: TRAC as Amber List (moderate evidence)
Mendeliome v1.246 TRAC Seb Lunke Added comment: Comment on list classification: Single variant reported to date in 6 patients; 2 unrelated children from consanguineous families of Pakistani descent (PMID: 21206088); 1 non-consanguineous family from North-west India (PMID: 33909184) and 1 consanguineous parents of East Indian (https://lymphosign.com/doi/10.14785/lymphosign-2022-0001) Also note annotation issues in certain variant curation and annotation tools.
Mendeliome v1.246 TRAC Seb Lunke Gene: trac has been classified as Amber List (Moderate Evidence).
Mendeliome v1.206 C18orf32 Naomi Baker gene: C18orf32 was added
gene: C18orf32 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: C18orf32 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: C18orf32 were set to PMID:35107634
Phenotypes for gene: C18orf32 were set to Neurodevelopmental disorder (MONDO:0700092), C18orf32-related
Review for gene: C18orf32 was set to RED
Added comment: Two siblings reported as affected, although sequencing only performed in one sibling, with homozygous loss-of-function variant identified. Clinical presentation included developmental delay, recurrent lower respiratory tract infections, sparse rough hair, roving eye movements, hypotonia, bilateral ankle contractures and inverted nipples.
Sources: Literature
Mendeliome v1.137 NFATC2 Paul De Fazio gene: NFATC2 was added
gene: NFATC2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NFATC2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NFATC2 were set to 35789258
Phenotypes for gene: NFATC2 were set to Skeletal system disorder MONDO:0005172
Review for gene: NFATC2 was set to RED
gene: NFATC2 was marked as current diagnostic
Added comment: Patient born to consanguineous parents homozygous for a frameshift variant. No other (unaffected) members of the family were homozygous. Family history of recurrent childhood deaths.

After a healthy birth the patient developed painless decreased range of motion at 1.5yrs leading to difficulty with ambulation at 3yrs. Formal orthopedic assessment at age 15 years
demonstrated a neurodevelopmentally normal young man with marked bilateral fixed flexion contractures of knees, hips, and ankles. The main musculoskeletal findings were painless contractures of the large and small joints of the upper and lower limbs, osteochondromas, and osteopenia. Patient was diagnosed with B-cell lymphoma at age 18.

Patient CD8+ T-cells show impaired polyfunctionality, and the patient had an accumulation of non-functional memory CD4+ T-cells. TFH cell function was also impaired.
Sources: Literature
Mendeliome v1.93 THSD1 Zornitza Stark Phenotypes for gene: THSD1 were changed from Aneurysm, intracranial berry, 12 , MIM# 618734 to Aneurysm, intracranial berry, 12 , MIM# 618734; Hydrops fetalis MONDO:0015193, THSD1-related
Mendeliome v1.89 DDR2 Zornitza Stark changed review comment from: Bi-allelic variants in this gene are associated with a severe perinatal skeletal dysplasia.

Mono-allelic variants cause Warburg-Cinotti syndrome, which is characterized by progressive corneal neovascularization, keloid formation, chronic skin ulcers, wasting of subcutaneous tissue, flexion contractures of the fingers, and acroosteolysis. Four unrelated families reported with missense variants, which were activating.; to: Bi-allelic variants in this gene are associated with a severe perinatal skeletal dysplasia. LoF.

Mono-allelic variants cause Warburg-Cinotti syndrome, which is characterized by progressive corneal neovascularization, keloid formation, chronic skin ulcers, wasting of subcutaneous tissue, flexion contractures of the fingers, and acroosteolysis. Four unrelated families reported with missense variants, which were activating. GoF.
Mendeliome v1.79 THSD1 Elena Savva reviewed gene: THSD1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 33569873, 27895300; Phenotypes: Aneurysm, intracranial berry, 12 MIM# 618734, nonimmune hydrops fetalis; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v1.65 RBFOX2 Chern Lim changed review comment from: - PMID: 26785492: Analysed CHD (1213 congenital heart disease trios) and control (autism spectrum disorder) trios for de novo mutations. Found RBFOX2 gene had significantly more damaging de novo variants than expected: 3 de novo LoF variants (eg. nonsense, frameshift, or canonical splice disruptions). All 3 probands have hypoplastic left heart syndrome (HLHS). No further patient-specific clinical or variant info were available. Same cohort later included in PMID: 32368696, listed 4 de novo variants in this gene, in patients with left ventricular outflow tract obstruction (LVOTO) or conotruncal defects (CTDs).

- PMID: 27670201: RNA expression study showed the silenced allele harbours a nonsense RBFOX2 variant (Arg287*), CHD patient heart tissue sample, same patient published in PMID: 26785492.
- PMID: 27485310: Functional studies using heart tissue sample from HLHS patient with NM_001031695.2:c.859C>T p.(Arg287*) showed subcellular mislocalisation, impacting its nuclear function in RNA splicing.

- PMID: 25205790: De novo 111.3kb del chr22:36038076-36149338 (hg19) which includes APOL5,APOL6,RBFOX2, in a patient with HLHS.

- PMID: 35137168: Rbfox2 conditional knockout mouse model recapitulated several molecular and phenotypic features of HLHS.; to: - PMID: 26785492: Analysed CHD (1213 congenital heart disease trios) and control (autism spectrum disorder) trios for de novo mutations. Found RBFOX2 gene had significantly more damaging de novo variants than expected: 3 de novo LoF variants (1x nonsense, 1x frameshift, 1x canonical splice variants). All 3 probands have hypoplastic left heart syndrome (HLHS) and no extra-cardiac features. Same cohort later included in PMID: 32368696, listed one additional de novo variant in this gene (missense variant) in a patient with conotruncal defects (CTDs).

- PMID: 27670201: RNA expression study showed the silenced allele harbours a nonsense RBFOX2 variant (Arg287*), CHD patient heart tissue sample, same patient published in PMID: 26785492.
- PMID: 27485310: Functional studies using heart tissue sample from HLHS patient with NM_001031695.2:c.859C>T p.(Arg287*) showed subcellular mislocalisation, impacting its nuclear function in RNA splicing.

- PMID: 25205790: De novo 111.3kb del chr22:36038076-36149338 (hg19) which includes APOL5,APOL6,RBFOX2, in a patient with HLHS.

- PMID: 35137168: Rbfox2 conditional knockout mouse model recapitulated several molecular and phenotypic features of HLHS.
Mendeliome v1.47 PAN2 Naomi Baker gene: PAN2 was added
gene: PAN2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PAN2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PAN2 were set to PMID:35304602; 29620724
Phenotypes for gene: PAN2 were set to Neurodevelopmental disorder, MONDO:0700092, PAN2-related
Review for gene: PAN2 was set to GREEN
Added comment: PMID:35304602 reports five individuals from 3 families with biallelic (homozygous) loss-of-function variants. Clinical presentation incudes mild-moderate intellectual disability, hypotonia, sensorineural hearing loss, EEG abnormalities, congenital heart defects (tetralogy of Fallot, septal defects, dilated aortic root), urinary tract malformations, ophthalmological anomalies, short stature with other skeletal anomalies, and craniofacial features including flat occiput, ptosis, long philtrum, and short neck.

PMID:29620724 reports one individual with biallelic (homozygous) loss-of-function variant who presented with global developmental delay, mild hypotonia, craniosynostosis, severe early-onset scoliosis, imperforate anus, and double urinary collecting system.
Sources: Literature
Mendeliome v1.15 IKBKG Zornitza Stark edited their review of gene: IKBKG: Added comment: X-linked systemic autoinflammatory disease (SAIDX) is characterized by the onset of systemic autoinflammation in the first months of life. Features include lymphadenopathy, hepatosplenomegaly, fever, panniculitis, and nodular skin rash. Additional manifestations may include inflammation of the optic nerve, intracranial hemorrhage, and lipodystrophy. Laboratory studies show hypogammaglobulinemia, increased or decreased white blood cell count, autoimmune cytopenias, elevated serum inflammatory markers, and a type I interferon signature. 6 unrelated boys and a girl reported. All variants resulted in absence of the domain encoded by exon 5 (NEMOdelEx5).

Note variants in this gene are associated with immunodeficiency +/- ectodermal features and with IP.; Changed phenotypes: Ectodermal dysplasia and immunodeficiency 1, MIM# 300291, Immunodeficiency 33 , MIM#300636, Incontinentia pigmenti, MIM# 308300, Autoinflammatory disease, systemic, X-linked, MIM# 301081
Mendeliome v0.14748 DSE Zornitza Stark Phenotypes for gene: DSE were changed from to Ehlers-Danlos syndrome, musculocontractural type 2 - MIM#615539
Mendeliome v0.14628 GLE1 Zornitza Stark Phenotypes for gene: GLE1 were changed from to Lethal congenital contracture syndrome 1, MIM# 253310
Mendeliome v0.14592 GLE1 Chirag Patel reviewed gene: GLE1: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 18204449, 22357925; Phenotypes: Lethal congenital contracture syndrome 1, MIM# 253310; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.14379 RBFOX2 Chern Lim edited their review of gene: RBFOX2: Added comment: - PMID: 26785492: Analysed CHD (1213 congenital heart disease trios) and control (autism spectrum disorder) trios for de novo mutations. Found RBFOX2 gene had significantly more damaging de novo variants than expected: 3 de novo LoF variants (eg. nonsense, frameshift, or canonical splice disruptions). All 3 probands have hypoplastic left heart syndrome (HLHS). No further patient-specific clinical or variant info were available. Same cohort later included in PMID: 32368696, listed 4 de novo variants in this gene, in patients with left ventricular outflow tract obstruction (LVOTO) or conotruncal defects (CTDs).

- PMID: 27670201: RNA expression study showed the silenced allele harbours a nonsense RBFOX2 variant (Arg287*), CHD patient heart tissue sample, same patient published in PMID: 26785492.
- PMID: 27485310: Functional studies using heart tissue sample from HLHS patient with NM_001031695.2:c.859C>T p.(Arg287*) showed subcellular mislocalisation, impacting its nuclear function in RNA splicing.

- PMID: 25205790: De novo 111.3kb del chr22:36038076-36149338 (hg19) which includes APOL5,APOL6,RBFOX2, in a patient with HLHS.

- PMID: 35137168: Rbfox2 conditional knockout mouse model recapitulated several molecular and phenotypic features of HLHS.; Changed publications: PMID: 26785492, 27670201, 27485310, 25205790, 35137168, 26785492
Mendeliome v0.14275 MYH3 Zornitza Stark Phenotypes for gene: MYH3 were changed from to Arthrogryposis, distal, type 2A (Freeman-Sheldon) 193700; Arthrogryposis, distal, type 2B3 (Sheldon-Hall) 618436; Contractures, pterygia, and spondylocarpostarsal fusion syndrome 1A 178110; Contractures, pterygia, and spondylocarpotarsal fusion syndrome 1B 618469
Mendeliome v0.14272 MYH3 Zornitza Stark reviewed gene: MYH3: Rating: GREEN; Mode of pathogenicity: None; Publications: 25957469, 26544689, 21531865, 18695058; Phenotypes: Arthrogryposis, distal, type 2A (Freeman-Sheldon) 193700, Arthrogryposis, distal, type 2B3 (Sheldon-Hall) 618436, Contractures, pterygia, and spondylocarpostarsal fusion syndrome 1A 178110, Contractures, pterygia, and spondylocarpotarsal fusion syndrome 1B 618469; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.13991 DSE Krithika Murali reviewed gene: DSE: Rating: GREEN; Mode of pathogenicity: None; Publications: 28306229, 23704329, 25703627, 32130795; Phenotypes: Ehlers-Danlos syndrome, musculocontractural type 2 - MIM#615539; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.13310 CHST14 Ain Roesley Phenotypes for gene: CHST14 were changed from to Ehlers-Danlos syndrome, musculocontractural type 1 MIM# 601776
Mendeliome v0.13308 CHST14 Ain Roesley reviewed gene: CHST14: Rating: GREEN; Mode of pathogenicity: None; Publications: 28306229, 25703627, 26373698; Phenotypes: Ehlers-Danlos syndrome, musculocontractural type 1 MIM# 601776; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.13303 CHN1 Ain Roesley Phenotypes for gene: CHN1 were changed from to Duane retraction syndrome 2,MIM#604356
Mendeliome v0.13301 CHN1 Ain Roesley reviewed gene: CHN1: Rating: GREEN; Mode of pathogenicity: Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments; Publications: 20301369; Phenotypes: Duane retraction syndrome 2,MIM#604356; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted; Current diagnostic: yes
Mendeliome v0.13297 PDGFRA Krithika Murali changed review comment from: ?Suitability for Incidentalome versus Mendeliome based on adult age of diagnosis in reported cases.

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Six unrelated families reported with heterozygous germline variants associated with familial GIST and/or inflammatory fibroid polyps - IFP (benign lesions caused by excessive tissue proliferation and inflammatory cell infiltration into the lumen of the GI tract). Note that reported individuals diagnosed as adults. One individual reported with diagnosis of gastric mass/polyps age 22 (in 1977) raising the possibility of pre-symptomatic disease onset in adolescence. Green PanelApp England in the following panels: tumour predisposition - childhood onset; inherited predisposition to GIST; sarcoma cancer susceptibility.

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PMID 34107389 Hodan et al 2021 - report a 35 yo F with jejunal IFP and a heterozygous germline missense PDGFRA variant (c.1664A>G p.Y555C) . The variant segregated with 3 relatives with confirmed IFPs. Two obligate carriers were reported to have had a similar phenotype while at least one obligate male carrier had no reported history of IFPs. This variant was also reported in an unrelated family with multiple IFPs in 2006.

PMID 29486293 Manley et al 2018 - proband is a 50 yo M with multiple ileal intusussceptions and IFPs and GIST. Heterozygous D846V germline variant identified. Variant identified in daughter and 2 siblings. Coarser face, coarser skin, broader hands and feet, unexplained premature loss of teeth requiring dentures in their 40s described in relatives with the variant, no polyps or tumour identified in screened family members. Pdgfra +/K mutant mice recapitulated the human phenotype. Mice with the constitutively activated mutant PDGFRA shown to have diffuse expansion of the gastrointestinal submucosa, which exhibits an increased number of spindled fibroblast-like cells and marked collagen deposition. Mutant mice also develop intestinal polyps morphologically similar to IFPs. The Pdgfra +/K mice also exhibit thickened skin due to excess collagen deposition within the dermis and subcutaneous tissues.

PMID 25975287 Ricci et al 2015 - report a family with het germline P653L PDGFRA missense variant. The proband was a 67 yo M with multiple intra-abdominal GIST and gastric/colonic inflammatory fibroid polyps. Multiple adult relatives (youngest age 31) were diagnosed with IFPs/fibrous tumours with the variant segregating with disease.

PMID: 18670346 Carney et al 2008 and PMID: 17566086 Pasini et al 2007 - heterozygous germline PDGFRA mutation (V561D) in an individual with GIST and multiple polyps, diagnosed initially aged 22 with multiple GIST/polyps. No other relatives available for genotyping and no other significant family history reported.

PMID: 17087943 de Raedt et al 2006 - heterozygous PDGFRA(Y555C) variant reported in a family with multiple relatives affected by IFP, including one death from secondary bowel obstruction age 35.

PMID: 14699510 Chompret et al 2004 - Heterozygous c.2675G>T D846Y germline variant detected in a French family with 5 relatives developing adult-onset GIST, variant segregated with disease.

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Gain of function somatic variants associated with sporadic GIST. Somatic chromosomal rearrangements resulting in PDGFRA and FIP1L1 gene fusion associated with idiopathic hypereosinophilic syndrome.; to: Six unrelated families reported with heterozygous germline variants associated with familial GIST and/or inflammatory fibroid polyps - IFP (benign lesions caused by excessive tissue proliferation and inflammatory cell infiltration into the lumen of the GI tract). Note that reported individuals diagnosed as adults. One individual reported with diagnosis of gastric mass/polyps age 22 (in 1977) raising the possibility of pre-symptomatic disease onset in adolescence. Green PanelApp England in the following panels: tumour predisposition - childhood onset; inherited predisposition to GIST; sarcoma cancer susceptibility.

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PMID 34107389 Hodan et al 2021 - report a 35 yo F with jejunal IFP and a heterozygous germline missense PDGFRA variant (c.1664A>G p.Y555C) . The variant segregated with 3 relatives with confirmed IFPs. Two obligate carriers were reported to have had a similar phenotype while at least one obligate male carrier had no reported history of IFPs. This variant was also reported in an unrelated family with multiple IFPs in 2006.

PMID 29486293 Manley et al 2018 - proband is a 50 yo M with multiple ileal intusussceptions and IFPs and GIST. Heterozygous D846V germline variant identified. Variant identified in daughter and 2 siblings. Coarser face, coarser skin, broader hands and feet, unexplained premature loss of teeth requiring dentures in their 40s described in relatives with the variant, no polyps or tumour identified in screened family members. Pdgfra +/K mutant mice recapitulated the human phenotype. Mice with the constitutively activated mutant PDGFRA shown to have diffuse expansion of the gastrointestinal submucosa, which exhibits an increased number of spindled fibroblast-like cells and marked collagen deposition. Mutant mice also develop intestinal polyps morphologically similar to IFPs. The Pdgfra +/K mice also exhibit thickened skin due to excess collagen deposition within the dermis and subcutaneous tissues.

PMID 25975287 Ricci et al 2015 - report a family with het germline P653L PDGFRA missense variant. The proband was a 67 yo M with multiple intra-abdominal GIST and gastric/colonic inflammatory fibroid polyps. Multiple adult relatives (youngest age 31) were diagnosed with IFPs/fibrous tumours with the variant segregating with disease.

PMID: 18670346 Carney et al 2008 and PMID: 17566086 Pasini et al 2007 - heterozygous germline PDGFRA mutation (V561D) in an individual with GIST and multiple polyps, diagnosed initially aged 22 with multiple GIST/polyps. No other relatives available for genotyping and no other significant family history reported.

PMID: 17087943 de Raedt et al 2006 - heterozygous PDGFRA(Y555C) variant reported in a family with multiple relatives affected by IFP, including one death from secondary bowel obstruction age 35.

PMID: 14699510 Chompret et al 2004 - Heterozygous c.2675G>T D846Y germline variant detected in a French family with 5 relatives developing adult-onset GIST, variant segregated with disease.

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Gain of function somatic variants associated with sporadic GIST. Somatic chromosomal rearrangements resulting in PDGFRA and FIP1L1 gene fusion associated with idiopathic hypereosinophilic syndrome.
Mendeliome v0.13007 PRKAR1A Zornitza Stark Phenotypes for gene: PRKAR1A were changed from to Acrodysostosis 1, with or without hormone resistance, MIM# 101800; Carney complex, type 1, MIM# 160980; Myxoma, intracardiac, MIM# 255960; Pigmented nodular adrenocortical disease, primary, 1, MIM# 610489
Mendeliome v0.13004 PRKAR1A Zornitza Stark reviewed gene: PRKAR1A: Rating: GREEN; Mode of pathogenicity: None; Publications: 10973256, 11115848, 12424709, 21651393; Phenotypes: Acrodysostosis 1, with or without hormone resistance, MIM# 101800, Carney complex, type 1, MIM# 160980, Myxoma, intracardiac, MIM# 255960, Pigmented nodular adrenocortical disease, primary, 1, MIM# 610489; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.12725 TNNI1 Zornitza Stark Phenotypes for gene: TNNI1 were changed from arthrogryposis; joint contractures to Arthrogryposis MONDO:0008779, TNNI1-related
Mendeliome v0.12714 TNNI1 Krithika Murali gene: TNNI1 was added
gene: TNNI1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TNNI1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TNNI1 were set to 34934811
Phenotypes for gene: TNNI1 were set to arthrogryposis; joint contractures
Review for gene: TNNI1 was set to AMBER
Added comment: No OMIM gene disease association reported

PMID 34934811 Nishimori et al report 2 individuals from a Japanese family with joint contractures, elevated CK and a novel heterozygous TNNI1 variant.

The proband was born with clasped thumbs (gestational age not stated) requiring surgical correction at 5 months of age. At age 14 was diagnosed with contractures of the neck, trunk, hip and knee with elevated serum CK (1689 IU/L). No muscle weakness noted. Muscle biopsy showed moth-eaten appearance of type I fibres and electron microscopy showed type 1 fibre Z disk streaming.

Trio exome sequencing identified a paternally heterozygous nonsense TNNI1 variant (c.523A>T p.K175*). The proband's father and paternal grandfather (not genotyped) also have a history of joint contractures with elevated CK.

The affected amino acid residue is in the tropomyosin binding site near the C-terminus and is highly conserved. The variant is absent from gnomAD. rt-PCR products of mRNA from the patient's muscle biopsy showed presence of both mutated and normal transcripts.
Sources: Literature
Mendeliome v0.12293 THSD1 Zornitza Stark Phenotypes for gene: THSD1 were changed from to Aneurysm, intracranial berry, 12 , MIM# 618734
Mendeliome v0.12289 THSD1 Zornitza Stark reviewed gene: THSD1: Rating: AMBER; Mode of pathogenicity: None; Publications: ; Phenotypes: Aneurysm, intracranial berry, 12 , MIM# 618734; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.12159 ADH1B Elena Savva Phenotypes for gene: ADH1B were changed from to Aerodigestive tract cancer, squamous cell, alcohol-related, protection against} MIM#103780; {Alcohol dependence, protection against} MIM#103780
Mendeliome v0.12155 ADH1B Elena Savva reviewed gene: ADH1B: Rating: RED; Mode of pathogenicity: None; Publications: ; Phenotypes: Aerodigestive tract cancer, squamous cell, alcohol-related, protection against} MIM#103780, {Alcohol dependence, protection against} MIM#103780; Mode of inheritance: Unknown
Mendeliome v0.11946 TBC1D1 Zornitza Stark Phenotypes for gene: TBC1D1 were changed from to CAKUT; Non-syndromic renal or urinary tract malformation, MONDO:0019720
Mendeliome v0.11943 TBC1D1 Zornitza Stark reviewed gene: TBC1D1: Rating: GREEN; Mode of pathogenicity: None; Publications: 26572137; Phenotypes: CAKUT, Non-syndromic renal or urinary tract malformation, MONDO:0019720; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.11823 NFIA Zornitza Stark Phenotypes for gene: NFIA were changed from to Brain malformations with or without urinary tract defects - MIM#613735
Mendeliome v0.11792 NFIA Krithika Murali reviewed gene: NFIA: Rating: GREEN; Mode of pathogenicity: None; Publications: 35018717, 33973697, 32926563; Phenotypes: Brain malformations with or without urinary tract defects - MIM#613735; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.11492 IL6 Zornitza Stark Phenotypes for gene: IL6 were changed from to {Crohn disease-associated growth failure} 266600; {Intracranial hemorrhage in brain cerebrovascular malformations, susceptibility to} 108010; {Rheumatoid arthritis, systemic juvenile} 604302; {Kaposi sarcoma, susceptibility to} 148000; {Type 1 diabetes mellitus} 222100; {Type 2 diabetes mellitus} 125853
Mendeliome v0.11490 IL6 Zornitza Stark reviewed gene: IL6: Rating: ; Mode of pathogenicity: None; Publications: ; Phenotypes: {Crohn disease-associated growth failure} 266600, {Intracranial hemorrhage in brain cerebrovascular malformations, susceptibility to} 108010, {Rheumatoid arthritis, systemic juvenile} 604302, {Kaposi sarcoma, susceptibility to} 148000, {Type 1 diabetes mellitus} 222100, {Type 2 diabetes mellitus} 125853; Mode of inheritance: None
Mendeliome v0.11289 KIF5A Zornitza Stark Phenotypes for gene: KIF5A were changed from to Neuropathy; Spastic paraplegia 10, autosomal dominant, MIM# 604187; Myoclonus, intractable, neonatal, MIM# 617235
Mendeliome v0.11286 KIF5A Zornitza Stark edited their review of gene: KIF5A: Added comment: Neonatal intractable myoclonus is a severe neurologic disorder characterized by the onset of intractable myoclonic seizures soon after birth. Affected infants have intermittent apnea, abnormal eye movements, pallor of the optic nerve, and lack of developmental progress. Brain imaging shows a progressive leukoencephalopathy. At least 3 unrelated individuals with de novo LoF variants.

SPG10/CMT: variants are generally in the motor domain.; Changed publications: 30057544, 29892902, 28902413, 26403765, 25695920, 25008398, 27463701, 27414745; Changed phenotypes: Neuropathy, Spastic paraplegia 10, autosomal dominant, MIM# 604187, Myoclonus, intractable, neonatal, MIM# 617235
Mendeliome v0.11215 NALCN Zornitza Stark Phenotypes for gene: NALCN were changed from to Congenital contractures of the limbs and face, hypotonia, and developmental delay - MIM#616266; Hypotonia, infantile, with psychomotor retardation and characteristic facies 1 - MIM#615419
Mendeliome v0.11192 NALCN Krithika Murali reviewed gene: NALCN: Rating: GREEN; Mode of pathogenicity: None; Publications: 25683120, 23749988, 24075186, 30167850; Phenotypes: Congenital contractures of the limbs and face, hypotonia, and developmental delay - MIM#616266, Hypotonia, infantile, with psychomotor retardation and characteristic facies 1 - MIM#615419; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.11095 NRCAM Ee Ming Wong gene: NRCAM was added
gene: NRCAM was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NRCAM was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NRCAM were set to PMID: 35108495
Phenotypes for gene: NRCAM were set to neurodevelopmental disorder, MONDO:0700092
Penetrance for gene: NRCAM were set to unknown
Review for gene: NRCAM was set to GREEN
gene: NRCAM was marked as current diagnostic
Added comment: -Ten individuals from 8 families with developmental delay/intellectual disability, hypotonia, peripheral neuropathy, and/or spasticity.
- Affected individuals are biallelic for missense and/or LoF variants which are mainly in the fibronectin type III (Fn-III) domain
- Zebrafish mutants lacking the third Fn-III domain displayed significantly altered swimming behavior compared to wild-type larvae (p < 0.03) and a trend toward increased amounts of alpha-tubulin fibers in the dorsal telencephalon, demonstrating an alteration in white matter tracts and projections
Sources: Literature
Mendeliome v0.10988 TBX18 Zornitza Stark Phenotypes for gene: TBX18 were changed from to Congenital anomalies of kidney and urinary tract 2, MIM# 143400
Mendeliome v0.10985 TBX18 Zornitza Stark reviewed gene: TBX18: Rating: GREEN; Mode of pathogenicity: None; Publications: 26235987; Phenotypes: Congenital anomalies of kidney and urinary tract 2, MIM# 143400; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.10417 SETBP1 Zornitza Stark Phenotypes for gene: SETBP1 were changed from to Schinzel-Giedion midface retraction syndrome, MIM# 269150; Intellectual disability, autosomal dominant 29, MIM# 616078
Mendeliome v0.10415 SETBP1 Zornitza Stark changed review comment from: GoF variants cause Schinzel-Giedion syndrome, whereas LoF variants cause SETBP1-haploinsufficiency syndrome, over 40 individuals reviewed in PMID 34807554.; to: GoF variants cause Schinzel-Giedion syndrome, a severe multi-system disorder characterized by recognizable facial characteristics, severe-profound intellectual disability, intractable epilepsy, cortical visual impairment, deafness, and congenital anomalies such as cardiac defects, urogenital defects, and bone abnormalities. Causative pathogenic variants are clustered within a 12-base pair hot spot region in exon 4.

LoF variants cause SETBP1-haploinsufficiency syndrome, characterized by hypotonia and mild motor developmental delay; intellectual abilities ranging from normal to severe disability; speech and language disorder; behavioral problems (most commonly attention/concentration deficits and hyperactivity, impulsivity), and refractive errors and strabismus. Over 40 individuals reviewed in PMID 34807554.
Mendeliome v0.10414 SETBP1 Zornitza Stark reviewed gene: SETBP1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20436468, 25217958, 34807554; Phenotypes: Schinzel-Giedion midface retraction syndrome, MIM# 269150, Mental retardation, autosomal dominant 29, MIM# 616078; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.10194 CHRNA3 Zornitza Stark changed review comment from: Five individuals from three unrelated families.; to: Five individuals from three unrelated families.

Onset is in utero or early childhood.

Affected individuals have impaired neuronal bladder and ureteral innervation causing coordination defects that result in secondary structural defects of the renal system, including hydronephrosis, vesicoureteral reflux (VUR), and small kidneys, that may result in chronic kidney disease as well as recurrent urinary tract infections (UTIs). Surgical treatment of VUR is not effective. Most individuals also have additional autonomic features, most commonly impaired pupillary reflex and sometimes orthostatic hypotension.
Mendeliome v0.9965 GRIP1 Zornitza Stark changed review comment from: Typical features include cryptophthalmos, syndactyly, and abnormalities of the respiratory and urogenital tract. At least 5 families reported.; to: Typical features include cryptophthalmos, syndactyly, and abnormalities of the respiratory and urogenital tract. At least 5 families reported.

'Mild' bi-allelic variants also postulated to cause isolated CAKUT, PMID 24700879.
Mendeliome v0.9737 MAFB Zornitza Stark Phenotypes for gene: MAFB were changed from to Multicentric carpotarsal osteolysis syndrome (MIM#166300); Duane retraction syndrome 3, MIM# 617041
Mendeliome v0.9735 MAFB Zornitza Stark reviewed gene: MAFB: Rating: GREEN; Mode of pathogenicity: None; Publications: 27181683; Phenotypes: Duane retraction syndrome 3, MIM# 617041; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.9702 MICAL1 Bryony Thompson gene: MICAL1 was added
gene: MICAL1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MICAL1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MICAL1 were set to 29394500; 21638339
Phenotypes for gene: MICAL1 were set to Autosomal dominant epilepsy with auditory features (ADEAF)
Review for gene: MICAL1 was set to AMBER
Added comment: Two families with supporting in vitro functional assays. Assessment of expression pattern of Mical-1 in the temporal neocortex of patients with intractable temporal epilepsy and pilocarpine-induced rat model, suggests Mical-1 may associate with inner pathophysiological modulation in epilepsy.
Sources: Expert list
Mendeliome v0.9607 COG6 Zornitza Stark changed review comment from: More than 5 unrelated families reported. Key features include growth retardation, developmental delay, microcephaly, liver and gastrointestinal disease, joint contractures and episodic fever. Ectodermal signs such as hypohidrosis/hyperthermia, hyperkeratosis and tooth anomalies are prominent. Note Shaheen syndrome, MIM#615328 is an allelic disorder, with overlapping clinical features, but normal transferring isoforms recorded creating confusion about whether it represents a distinct entity.; to: More than 5 unrelated families reported. Key features include growth retardation, developmental delay, microcephaly, liver and gastrointestinal disease, joint contractures and episodic fever. Ectodermal signs such as hypohidrosis/hyperthermia, hyperkeratosis and tooth anomalies are prominent. Note Shaheen syndrome, MIM#615328 is an allelic disorder, with overlapping clinical features, but normal transferrin isoforms recorded creating confusion about whether it represents a distinct entity.
Mendeliome v0.9365 DSTYK Zornitza Stark changed review comment from: Mono-allelic variants and CAKUT: Multiple families reported, zebrafish model has multiple congenital anomalies including of the GU tract. Established gene-disease association.

Bi-allelic variants and HSP: Three families reported, but all had same intragenic deletion/insertion, suggestive of founder effect.; to: Mono-allelic variants and CAKUT: Multiple families reported, zebrafish model has multiple congenital anomalies including of the GU tract. Disputed gene-disease association as original variants present at relatively high pop frequency as per review by Ain Roesley.

Bi-allelic variants and HSP: Three families reported, but all had same intragenic deletion/insertion, suggestive of founder effect.
Mendeliome v0.9364 DSTYK Ain Roesley reviewed gene: DSTYK: Rating: RED; Mode of pathogenicity: None; Publications: 23862974; Phenotypes: Congenital anomalies of kidney and urinary tract 1, MIM# 610805, Spastic paraplegia 23, MIM# 270750; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
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
Mendeliome v0.9333 PLXNA1 Zornitza Stark gene: PLXNA1 was added
gene: PLXNA1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PLXNA1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: PLXNA1 were set to 34054129
Phenotypes for gene: PLXNA1 were set to Neurodevelopmental disorder with cerebral and eye anomalies
Review for gene: PLXNA1 was set to GREEN
Added comment: Dworschak et al. (2021) via WES reported 10 patients from 7 families with biallelic (n=7) or de novo (n=3) PLXNA1 variants. Shared phenotypic features include global developmental delay (9/10), brain anomalies (6/10), and eye anomalies (7/10). Seizures were predominantly reported in patients with monoallelic variants. Zebrafish studies showed an embryonic role of plxna1a in the development of the central nervous system and the eye. Biallelic variants in the extracellular Plexin-A1 domains lead to impaired dimerization or lack of receptor molecules, whereas monoallelic variants in the intracellular Plexin-A1 domains might impair downstream signaling through a dominant-negative effect.
Sources: Literature
Mendeliome v0.9298 WIPI2 Dean Phelan reviewed gene: WIPI2: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 30968111, 34557665; Phenotypes: global developmental delay, intellectual disability, refractory infantile/childhood-onset epilepsy, progressive tetraplegia with joint contractures, dyskinesia, speech and visual impairment, autistic features, ataxic gait; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.9297 ABHD16A Lucy Spencer gene: ABHD16A was added
gene: ABHD16A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ABHD16A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ABHD16A were set to PMID: 34587489
Phenotypes for gene: ABHD16A were set to Spastic paraplegia
Review for gene: ABHD16A was set to GREEN
Added comment: 11 individuals from 6 families with a complicated form of hereditary spastic paraplegia who carry bi-allelic deleterious variants in ABHD16A. Affected individuals present with a similar phenotype consisting of global developmental delay/intellectual disability, progressive spasticity affecting the upper and lower limbs, and corpus callosum and white matter anomalies. Immunoblot analysis on extracts from fibroblasts from four affected individuals demonstrated little to no ABHD16A protein levels compared to controls.
In 5 of the families the affected members were homozygous, 3 of these families were consanguineous. 2 families have the same variant- both families are French-Canadian.
4 missense variants, 1 frameshift, 1 nonsense.
From PMID: 34587489
Sources: Literature
Mendeliome v0.9098 TPI1 Zornitza Stark changed review comment from: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital hemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.; to: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital haemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.
Mendeliome v0.9098 TPI1 Zornitza Stark edited their review of gene: TPI1: Added comment: More than 10 unrelated families reported; bi-allelic (missense, nonsense, frameshift) variants; Common p.Glu104Asp variant in Northern European population

Triosephosphate isomerase deficiency (TPID) is an autosomal recessive multisystem disorder characterised by early childhood onset congenital hemolytic anaemia, and progressive neuromuscular dysfunction. Many patients die from respiratory failure in childhood. The neurological features are variable, but usually includes lower motor neuron dysfunction with hypotonia, muscle weakness and atrophy, and hyporeflexia. Other features include intracellular accumulation of dihydroxyacetone phosphate (DHAP), particularly in red blood cells and increased susceptibility to infections.; Changed publications: 9338582, 32873690, 8503454; Changed phenotypes: Haemolytic anaemia due to triosephosphate isomerase deficiency, MIM# 615512
Mendeliome v0.9023 KIDINS220 Zornitza Stark Phenotypes for gene: KIDINS220 were changed from Spastic paraplegia, intellectual disability, nystagmus, and obesity, MIM# 617296; cerebral ventriculomegaly; limb contractures to Spastic paraplegia, intellectual disability, nystagmus, and obesity, MIM# 617296; Ventriculomegaly and arthrogryposis, MIM# 619501
Mendeliome v0.9021 CHRM1 Bryony Thompson gene: CHRM1 was added
gene: CHRM1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: CHRM1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CHRM1 were set to 34212451; 31981491; 12483218
Phenotypes for gene: CHRM1 were set to Neurodevelopmental delay; intellectual disability; autism
Review for gene: CHRM1 was set to AMBER
Added comment: PMID: 34212451 - 2 unrelated cases with de novo missense variants (p.Pro380Leu and p.Phe425Ser), one case with early-onset refractory epilepsy, severe disability, and progressive cerebral and cerebellar atrophy, and the second case with mild dysmorphism, global developmental delay, and moderate intellectual disability. In vitro biochemical analyses of p.Pro380Leu demonstrated a reduction in protein levels, impaired cellular trafficking, and defective activation of intracellular signaling pathways.
PMID: 31981491 - an autism spectrum disorder (no other information on phenotype, except ascertained to have severe neurodevelopmental delay) case with a de novo missense variant p.(Arg210Leu)
PMID: 12483218 - null mouse model assessing memory demonstrated selective cognitive dysfunction.
Sources: Literature
Mendeliome v0.9007 KCTD7 Zornitza Stark Phenotypes for gene: KCTD7 were changed from to Epilepsy, progressive myoclonic 3, with or without intracellular inclusions (MIM#611726)
Mendeliome v0.9004 KCTD7 Kristin Rigbye reviewed gene: KCTD7: Rating: GREEN; Mode of pathogenicity: None; Publications: 22693283, 22748208; Phenotypes: Epilepsy, progressive myoclonic 3, with or without intracellular inclusions (MIM#611726), AR; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8883 TOR1AIP1 Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness; Contractures to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Congenital myasthenic syndrome
Mendeliome v0.8841 TAP1 Zornitza Stark Phenotypes for gene: TAP1 were changed from to Bare lymphocyte syndrome, type I MIM#604571; Low CD8; absent MHC I on lymphocytes; vasculitis; pyoderma gangrenosum; skin lesions; recurrent respiratory tract infections; bronchiectasis
Mendeliome v0.8835 TAP1 Danielle Ariti reviewed gene: TAP1: Rating: GREEN; Mode of pathogenicity: None; Publications: 28161407, 10074494, 1473153; Phenotypes: Bare lymphocyte syndrome, type I MIM#604571, Low CD8, absent MHC I on lymphocytes, vasculitis, pyoderma gangrenosum, skin lesions, recurrent respiratory tract infections, bronchiectasis; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8722 RFXAP Zornitza Stark Phenotypes for gene: RFXAP were changed from to Bare lymphocyte syndrome, type II, complementation group D MIM# 209920; Low CD4+ T cells; reduced MHC II expression on lymphocytes; Normal-low Ig levels; Failure to thrive; respiratory/gastrointestinal infections; liver/biliary tract disease; diarrhoea; Severe autoimmune cytopaenia; agammaglobulinaemia
Mendeliome v0.8719 RFXANK Zornitza Stark Phenotypes for gene: RFXANK were changed from to MHC class II deficiency, complementation group B MIM# 209920; Bare Lymphocyte Syndrome, type II, complementation group B; Low CD4+ T cells; reduced MHC II expression on lymphocytes; Normal-low Ig levels; Failure to thrive; respiratory/gastrointestinal infections; liver/biliary tract disease; diarrhoea; Severe autoimmune cytopaenia; agammaglobulinaemia
Mendeliome v0.8713 RFXANK Danielle Ariti reviewed gene: RFXANK: Rating: GREEN; Mode of pathogenicity: None; Publications: 12618906; Phenotypes: MHC class II deficiency, complementation group B MIM# 209920, Bare Lymphocyte Syndrome, type II, complementation group B, Low CD4+ T cells, reduced MHC II expression on lymphocytes, Normal-low Ig levels, Failure to thrive, respiratory/gastrointestinal infections, liver/biliary tract disease, diarrhoea, Severe autoimmune cytopaenia, agammaglobulinaemia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8713 RFXAP Danielle Ariti reviewed gene: RFXAP: Rating: GREEN; Mode of pathogenicity: None; Publications: 9118943, 32875002, 11258423; Phenotypes: Bare lymphocyte syndrome, type II, complementation group D MIM# 209920, Low CD4+ T cells, reduced MHC II expression on lymphocytes, Normal-low Ig levels, Failure to thrive, respiratory/gastrointestinal infections, liver/biliary tract disease, diarrhoea, Severe autoimmune cytopaenia, agammaglobulinaemia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8630 ERBB3 Zornitza Stark Phenotypes for gene: ERBB3 were changed from Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis; Complex neurocristinopathy to Lethal congenital contractural syndrome 2, MIM# 607598; Visceral neuropathy, familial, 1, autosomal recessive, MIM# 243180; Hirschsprung disease; Arthrogryposis; Complex neurocristinopathy
Mendeliome v0.8629 ERBB3 Zornitza Stark edited their review of gene: ERBB3: Changed phenotypes: Lethal congenital contractural syndrome 2, MIM# 607598, Visceral neuropathy, familial, 1, autosomal recessive, MIM# 243180, Complex neurocristinopathy
Mendeliome v0.8611 PBX1 Zornitza Stark Phenotypes for gene: PBX1 were changed from to Congenital anomalies of kidney and urinary tract syndrome with or without hearing loss, abnormal ears, or developmental delay, MIM# 617641
Mendeliome v0.8608 PBX1 Zornitza Stark reviewed gene: PBX1: Rating: GREEN; Mode of pathogenicity: None; Publications: 28566479, 29036646; Phenotypes: Congenital anomalies of kidney and urinary tract syndrome with or without hearing loss, abnormal ears, or developmental delay, MIM# 617641; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.8574 ERBB3 Zornitza Stark edited their review of gene: ERBB3: Changed phenotypes: Lethal congenital contractural syndrome 2, MIM# 607598, Complex neurocristinopathy
Mendeliome v0.8574 ERBB3 Zornitza Stark Phenotypes for gene: ERBB3 were changed from Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis; Neurodevelopmental disorder with gut dysmotility to Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis; Complex neurocristinopathy
Mendeliome v0.8573 ERBB3 Zornitza Stark Phenotypes for gene: ERBB3 were changed from Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis to Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis; Neurodevelopmental disorder with gut dysmotility
Mendeliome v0.8571 ERBB3 Zornitza Stark changed review comment from: Two families reported with contractures, positional approach used in gene discovery (2007). Another family reported more recently with a multi-system disorder but without contractures.; to: Lethal congenital contractual syndrome: Two families reported with contractures, positional approach used in gene discovery (2007). Another family reported more recently with a multi-system disorder but without contractures.
Mendeliome v0.8571 ERBB3 Zornitza Stark edited their review of gene: ERBB3: Added comment: PMID 33497358: 6 individuals from 4 unrelated families reported with severe gut dysmotility and neurodevelopmental disorder. Note variants in this gene have also recently been linked to Hirschsprung's disease.; Changed rating: GREEN; Changed publications: 17701904, 31752936, 33497358; Changed phenotypes: Lethal congenital contractural syndrome 2, MIM# 607598, Neurodevelopmental disorder with gut dysmotility
Mendeliome v0.8487 COL25A1 Zornitza Stark edited their review of gene: COL25A1: Added comment: PMID: 2643702 - Patient: 273182 reported in DECIPHER, chet COL25A1 missense variants (listed as Likely Pathogenic). Phenotype includes Duane anomaly of the eye.

PMID: 31875546 - Mouse models, including Col25a1 KO and muscle-specific KO mice showed a significant reduction in the number of motor neurons in the cranial nerve nuclei, including the oculomotor, trochlear, trigeminal, and facial motor nuclei. Abnormalities in motor innervation of muscles of the head, such as the extraocular and masseter muscles, were also observed

PMID: 31875546 - Functional studies in human cell lines showed that the reported COL25A1 variants (G382R and G497X) impaired the interaction of COL25A1 with receptor protein tyrosine phosphatases, thereby reducing the ability to attract motor axons.; Changed rating: GREEN; Changed publications: 25500261, 26486031, 31875546, 26437029
Mendeliome v0.8481 CIITA Zornitza Stark Phenotypes for gene: CIITA were changed from to Bare Lymphocyte Syndrome, type II, complementation group A MIM# 209920; varied ID; bronchiolitis; pneumonia; severe autoimmune cytopaenia; CD4 T-cell lymphopaenia; hypogammaglobulinemia; absence of antigen-induced immune response; chronic diarrhoea; recurrent respiratory infections; recurrent gastroenteritis; failure to thrive; liver/biliary tract disease
Mendeliome v0.8478 CIITA Zornitza Stark reviewed gene: CIITA: Rating: GREEN; Mode of pathogenicity: None; Publications: 8402893, 9099848, 11862382, 28676232, 24789686, 20197681, 11466404, 15821736, 12910265; Phenotypes: Bare Lymphocyte Syndrome, type II, complementation group A MIM# 209920, varied ID, bronchiolitis, pneumonia, severe autoimmune cytopaenia, CD4 T-cell lymphopaenia, hypogammaglobulinemia, absence of antigen-induced immune response, chronic diarrhoea, recurrent respiratory infections, recurrent gastroenteritis, failure to thrive, liver/biliary tract disease; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8475 CD3G Zornitza Stark Phenotypes for gene: CD3G were changed from to Immunodeficiency 17, CD3 gamma deficient MIM# 615607; immune deficiency; autoimmunity; failure to thrive; recurrent gastrointestinal infections; recurrent respiratory infections; autoimmune haemolytic anaemia; bronchiolitis obliterans; low CD3 complex; partial T lymphocytopenia; intractable diarrhoea.
Mendeliome v0.8468 CD3G Danielle Ariti reviewed gene: CD3G: Rating: GREEN; Mode of pathogenicity: None; Publications: 2872416, 1635567, 17277165, 23590417, 24910257, 18482219, 31921117, 11160319; Phenotypes: Immunodeficiency 17, CD3 gamma deficient MIM# 615607, immune deficiency, autoimmunity, failure to thrive, recurrent gastrointestinal infections, recurrent respiratory infections, autoimmune haemolytic anaemia, bronchiolitis obliterans, low CD3 complex, partial T lymphocytopenia, intractable diarrhoea.; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.8407 MUC1 Zornitza Stark edited their review of gene: MUC1: Added comment: Well established gene-disease association, but note main variant type not readily tractable by NGS.; Changed rating: GREEN; Changed mode of pathogenicity: Other; Changed publications: Medullary cystic kidney disease 1 (MIM#174000); Changed phenotypes: Medullary cystic kidney disease 1 (MIM#174000); Changed mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.7981 CNTNAP1 Zornitza Stark Phenotypes for gene: CNTNAP1 were changed from to Hypomyelinating neuropathy, congenital, 3, MIM#618186; Lethal congenital contracture syndrome 7, MIM# 616286
Mendeliome v0.7978 CNTNAP1 Zornitza Stark reviewed gene: CNTNAP1: Rating: GREEN; Mode of pathogenicity: None; Publications: 28374019, 29511323, 27668699; Phenotypes: Hypomyelinating neuropathy, congenital, 3, MIM#618186, Lethal congenital contracture syndrome 7, MIM# 616286; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.7978 GLDN Zornitza Stark Phenotypes for gene: GLDN were changed from to Lethal congenital contracture syndrome 11, MIM# 617194; MONDO:0014965
Mendeliome v0.7975 GLDN Zornitza Stark reviewed gene: GLDN: Rating: GREEN; Mode of pathogenicity: None; Publications: 27616481, 32812332, 28726266; Phenotypes: Lethal congenital contracture syndrome 11, MIM# 617194, MONDO:0014965; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.7974 ZBTB42 Zornitza Stark gene: ZBTB42 was added
gene: ZBTB42 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: ZBTB42 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ZBTB42 were set to 25055871
Phenotypes for gene: ZBTB42 were set to Lethal congenital contracture syndrome 6, MIM# 616248
Review for gene: ZBTB42 was set to AMBER
Added comment: Homozygous missense variant reported in a family with three stillbirths and a phenotype consistent with LCCS. Supportive zebrafish model.
Sources: Expert Review
Mendeliome v0.7973 MYBPC1 Zornitza Stark Phenotypes for gene: MYBPC1 were changed from to Arthrogryposis, distal, type 1B 614335; Lethal congenital contracture syndrome 4, MIM# 614915; Myopathy, congenital, with tremor MIM#618524
Mendeliome v0.7970 MYBPC1 Zornitza Stark reviewed gene: MYBPC1: Rating: GREEN; Mode of pathogenicity: None; Publications: 20045868, 22610851, 23873045, 26661508, 31264822, 31025394; Phenotypes: Arthrogryposis, distal, type 1B 614335, Lethal congenital contracture syndrome 4, MIM# 614915, Myopathy, congenital, with tremor MIM#618524; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.7970 ERBB3 Zornitza Stark Phenotypes for gene: ERBB3 were changed from Lethal congenital contractural syndrome 2, MIM# 607598 to Lethal congenital contractural syndrome 2, MIM# 607598; Hirschsprung disease; Arthrogryposis
Mendeliome v0.7968 ADCY6 Zornitza Stark Phenotypes for gene: ADCY6 were changed from Lethal congenital contracture syndrome 8, OMIM # 616287 to Lethal congenital contracture syndrome 8, OMIM # 616287; MONDO:0014570
Mendeliome v0.7967 ADGRG6 Zornitza Stark edited their review of gene: ADGRG6: Changed phenotypes: Lethal congenital contracture syndrome 9, MIM #616503, MONDO:0014670
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
Mendeliome v0.7905 PLG Zornitza Stark changed review comment from: Association between mono-allelic variants and HAE: Over 20 families reported with a recurrent variant, p.Lys330Glu. Single family reported with a different variant. Note bi-allelic variants are associated with a separate disorder.

Bi-allelic variants and plasminogen deficiency: congenital plasminogen deficiency is characterised clinically by chronic mucosal pseudomembranous lesions consisting of subepithelial fibrin deposition and inflammation. The most common clinical manifestation is ligneous ('wood-like') conjunctivitis, a redness and subsequent formation of pseudomembranes mostly on the palpebral surfaces of the eye that progress to white, yellow-white, or red thick masses with a wood-like consistency that replace the normal mucosa. The lesions may be triggered by local injury and/or infection and often recur after local excision. Pseudomembranous lesions of other mucous membranes often occur in the mouth, nasopharynx, trachea, and female genital tract. Some affected children also have congenital occlusive hydrocephalus. At least 3 unrelated families reported.; to: Association between mono-allelic variants and HAE: Over 20 families reported with a recurrent variant, p.Lys330Glu. Single family reported with a different variant. Note bi-allelic variants are associated with a separate disorder.

Bi-allelic variants and plasminogen deficiency: congenital plasminogen deficiency is characterised clinically by chronic mucosal pseudomembranous lesions consisting of subepithelial fibrin deposition and inflammation. The most common clinical manifestation is ligneous ('wood-like') conjunctivitis, a redness and subsequent formation of pseudomembranes mostly on the palpebral surfaces of the eye that progress to white, yellow-white, or red thick masses with a wood-like consistency that replace the normal mucosa. The lesions may be triggered by local injury and/or infection and often recur after local excision. Pseudomembranous lesions of other mucous membranes often occur in the mouth, nasopharynx, trachea, and female genital tract. Some affected children also have congenital occlusive hydrocephalus. Over 20 unrelated families reported.
Mendeliome v0.7767 FGB Zornitza Stark changed review comment from: Inherited disorders of fibrinogen affect either the quantity (afibrinogenaemia and hypofibrinogenaemia) or the quality (dysfibrinogenemia) of the circulating fibrinogen or both.

Afibrinogenaemia is characterized by the complete absence of immunoreactive fibrinogen. Bleeding due to afibrinogenaemia usually manifests in the neonatal period, with 85% of cases presenting umbilical cord bleeding, but a later age of onst is not unusual. Bleeding may occur in the skin, gastrointestinal tract, genitourinary tract, or the central nervous system, with intracranial haemorrhage being reported as the major cause of death. Patients are susceptible to spontaneous rupture of the spleen. First-trimester pregnancy loss is common. Both arterial and venous thromboembolic complications have been reported. Hypofibrinogenaemia is a milder disorder. Well established gene-disease association.; to: Inherited disorders of fibrinogen affect either the quantity (afibrinogenaemia and hypofibrinogenaemia) or the quality (dysfibrinogenemia) of the circulating fibrinogen or both.

Afibrinogenaemia is characterized by the complete absence of immunoreactive fibrinogen. Bleeding due to afibrinogenaemia usually manifests in the neonatal period, with 85% of cases presenting umbilical cord bleeding, but a later age of onst is not unusual. Bleeding may occur in the skin, gastrointestinal tract, genitourinary tract, or the central nervous system, with intracranial haemorrhage being reported as the major cause of death. Patients are susceptible to spontaneous rupture of the spleen. First-trimester pregnancy loss is common. Both arterial and venous thromboembolic complications have been reported. Hypofibrinogenaemia is a milder disorder.

Well established gene-disease association.
Mendeliome v0.7192 ADCY6 Zornitza Stark changed review comment from: Laquerriere et al. (2014): 2 sibs from a consanguineous family with an axoglial form of lethal congenital contracture syndrome, and homozygous missense ADCY6 mutation (R1116C). The parents were heterozygous for the mutation. Knocked down ADCY6 orthologs in zebrafish showed a loss of myelin basic protein expression in the peripheral nervous system but no defects in Schwann cell migration and axonal growth. Gonzaga‐Jauregui et al. (2015): 1 patient with congenital hypotonia, distal joint contractures, hypomyelinating neuropathy, and vocal cord paralysis, and a homozygous missense ADCY6 variant. No functional studies. Deceased sister with a similar phenotype with hypotonia, areflexia, and hypomyelinating neuropathy who died at 18 months of respiratory insufficiency. Agolini et al. (2020): 1 patient with severe form of AMC, with two novel compound heterozygous variants in ADCY6 (parents confirmed carriers), but no functional studies.
Sources: Literature; to: - PMID: 33820833 (2021) - Further 2 sibs reported with a homozygous c.3346C>T:p.Arg1116Cys variant in the ADCY6 gene. The family was identified from a cohort of 315 genetically undiagnosed and unrelated AMC families. Arthrogryposis and IUGR were detected prenatally.

Laquerriere et al. (2014): 2 sibs from a consanguineous family with an axoglial form of lethal congenital contracture syndrome, and homozygous missense ADCY6 mutation (R1116C). The parents were heterozygous for the mutation. Knocked down ADCY6 orthologs in zebrafish showed a loss of myelin basic protein expression in the peripheral nervous system but no defects in Schwann cell migration and axonal growth. Gonzaga‐Jauregui et al. (2015): 1 patient with congenital hypotonia, distal joint contractures, hypomyelinating neuropathy, and vocal cord paralysis, and a homozygous missense ADCY6 variant. No functional studies. Deceased sister with a similar phenotype with hypotonia, areflexia, and hypomyelinating neuropathy who died at 18 months of respiratory insufficiency. Agolini et al. (2020): 1 patient with severe form of AMC, with two novel compound heterozygous variants in ADCY6 (parents confirmed carriers), but no functional studies.
Sources: Literature
Mendeliome v0.7084 FBN2 Zornitza Stark edited their review of gene: FBN2: Added comment: The association between mono-allelic variants in FBN2 and CCA is well established. Recent report of bi-allelic variants, Kloth (2021): biallelic FBN2 variants (PTC/missense) in a teenager with severe CCA, including cardiac defects, mild scoliosis and muscular involvement. Carrier parents both "healthy/unaffected". Phenotype matches mouse K/O. Authors performed a lit review and identified an additional 2 homozygous patients (both missense variants) with - fetal akinesia, brain ischemia and neonatal death - severe muscle weakness with bilateral clubfeet, a pronounced gait disturbance, recurrent patellar dislocations, flexion contractures, camptodactyly, widespread striae and an unusual myofibrillar disorganization, variation in fiber size and atrophic fibers in muscle biopsy.

Evidence for association with Macular degeneration, early-onset MIM#616118 is limited. One family reported, plus some rare variants reported in cohort studies. The familial variant p.Glu1144Lys is present in 11 hets in gnomad and has benign in silicos. The second variant reported in the paper, p.Met1247Thr is present in >20 hets.; Changed rating: GREEN; Changed publications: 33571691; Changed phenotypes: Contractural arachnodactyly, congenital MIM#121050, Macular degeneration, early-onset MIM#616118; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.6901 SPINT2 Zornitza Stark changed review comment from: More than 15 unrelated families reported.; to: Well established gene-disease association. PMID 30445423 reviews 34 patients from 26 families: 13 different variants in SPINT2 were seen, including 3 premature termination codons, 2 start codon removals, and 3 canonical splice site variants, supporting loss of function as the pathogenic mechanism. The most commonly observed variant was Y163C, observed in 40 (59%) of 68 disease alleles. Seven unrelated patients with the Y163C mutation had a shared haplotype, suggesting that it is a founder mutation. Choanal atresia (20/34) and keratitis of infantile onset (26/34) were the most common findings. All patients presented with intractable diarrhoea, with onset typically in the first 2 weeks of life. Episodes of intestinal pseudoobstruction sometimes preceded the onset of diarrhoea. Characteristic epithelial tufts on intestinal histology were seen in 13 of the 34 patients.
Mendeliome v0.6793 MPEG1 Zornitza Stark gene: MPEG1 was added
gene: MPEG1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: MPEG1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: MPEG1 were set to 33224153; 33692780; 28422754
Phenotypes for gene: MPEG1 were set to Immunodeficiency 77, MIM# 619223
Review for gene: MPEG1 was set to GREEN
Added comment: Immunodeficiency-77 (IMD77) is an immunologic disorder characterized by recurrent and persistent polymicrobial infections with multiple unusual organisms. Skin and pulmonary infections are the most common, consistent with increased susceptibility to epithelial cell infections. The age at onset is highly variable: some patients have recurrent infections from childhood, whereas others present in late adulthood. The limited number of reported patients are all female, suggesting incomplete penetrance or a possible sex-influenced trait. Patient cells, mainly macrophages, show impaired killing of intracellular bacteria and organisms, including nontubercular mycobacteria, although there is also impaired killing of other organisms, such as Pseudomonas, Candida, and Aspergillus.

Four individuals reported, functional data, including animal model.
Sources: Expert list
Mendeliome v0.6684 IFRD1 Zornitza Stark gene: IFRD1 was added
gene: IFRD1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IFRD1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IFRD1 were set to 29362493
Phenotypes for gene: IFRD1 were set to Hereditary spastic paraplegia; peripheral neuropathy; ataxia
Review for gene: IFRD1 was set to RED
Added comment: A variant segregated with slowly progressing gait ataxia, pyramidal tract signs and peripheral neuropathy in three siblings from a single Chinese family. No functional analyses of the variant has been conducted. The variant (c.514 A>G, p.I172V) is too common (0.3%) for a dominant condition in the African population in gnomAD.
Sources: Expert Review
Mendeliome v0.6684 IFRD1 Zornitza Stark gene: IFRD1 was added
gene: IFRD1 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: IFRD1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: IFRD1 were set to 29362493
Phenotypes for gene: IFRD1 were set to Hereditary spastic paraplegia; peripheral neuropathy; ataxia
Review for gene: IFRD1 was set to RED
Added comment: A variant segregated with slowly progressing gait ataxia, pyramidal tract signs and peripheral neuropathy in three siblings from a single Chinese family. No functional analyses of the variant has been conducted. The variant (c.514 A>G, p.I172V) is too common (0.3%) for a dominant condition in the African population in gnomAD.
Sources: Expert Review
Mendeliome v0.6668 WBP11 Zornitza Stark Phenotypes for gene: WBP11 were changed from malformation syndrome affecting the cardiac, skeletal, gastrointestinal and renal systems to Vertebral, cardiac, tracheoesophageal, renal, and limb defects, MIM# 619227; malformation syndrome affecting the cardiac, skeletal, gastrointestinal and renal systems
Mendeliome v0.6667 WBP11 Zornitza Stark reviewed gene: WBP11: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Vertebral, cardiac, tracheoesophageal, renal, and limb defects, MIM# 619227; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v0.6552 KIDINS220 Zornitza Stark Phenotypes for gene: KIDINS220 were changed from to Spastic paraplegia, intellectual disability, nystagmus, and obesity, MIM# 617296; cerebral ventriculomegaly; limb contractures
Mendeliome v0.6539 KIDINS220 Eleanor Williams reviewed gene: KIDINS220: Rating: AMBER; Mode of pathogenicity: None; Publications: 33205811, 28934391, 22048169; Phenotypes: cerebral ventriculomegaly, limb contractures; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.6297 SHPK Bryony Thompson gene: SHPK was added
gene: SHPK was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SHPK was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SHPK were set to 25647543; 27604308
Phenotypes for gene: SHPK were set to Sedoheptulokinase deficiency MIM#617213
Review for gene: SHPK was set to AMBER
Added comment: 2 unrelated cases reported, with elevated excretion of erythritol and sedoheptulose, and each had a homozygous nonsense variant. The first patient presented with neonatal cholestasis, hypoglycemia, and anemia, while the second patient presented with congenital arthrogryposis multiplex, multiple contractures, and dysmorphisms. Due to inconsistency in phenotypes, likely SHPK deficiency is a benign disorder.
Sources: Literature
Mendeliome v0.6213 BMP7 Zornitza Stark Phenotypes for gene: BMP7 were changed from Non-syndromic metopic craniosynostosis; Congenital abnormalities of the kidneys and urinary tract to Non-syndromic metopic craniosynostosis; Congenital abnormalities of the kidneys and urinary tract; Mayer-Rokitansky-Küster-Hauser syndrome (MRKHS)
Mendeliome v0.6211 BMP7 Zornitza Stark edited their review of gene: BMP7: Changed phenotypes: Non-syndromic metopic craniosynostosis, Congenital abnormalities of the kidneys and urinary tract, Mayer-Rokitansky-Küster-Hauser syndrome (MRKHS)
Mendeliome v0.6211 BMP7 Zornitza Stark Phenotypes for gene: BMP7 were changed from Non-syndromic metopic craniosynostosis to Non-syndromic metopic craniosynostosis; Congenital abnormalities of the kidneys and urinary tract
Mendeliome v0.6210 BMP7 Zornitza Stark edited their review of gene: BMP7: Changed phenotypes: Non-syndromic metopic craniosynostosis, Congenital abnormalities of the kidneys and urinary tract
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
Mendeliome v0.5684 DPAGT1 Zornitza Stark changed review comment from: Type I CDG. More than 20 unrelated families reported. Most affected individuals have a very severe disease course, where common findings are pronounced muscular hypotonia, intractable epilepsy, global developmental delay/intellectual disability, and early death. Additional features that may be observed include apnoea and respiratory deficiency, cataracts, joint contractures, vermian hypoplasia, dysmorphic features (esotropia, arched palate, micrognathia, finger clinodactyly, single flexion creases) and feeding difficulties.

Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM 614750 is a milder allelic disorder.; to: Type I CDG. More than 20 unrelated families reported. Most affected individuals have a very severe disease course, where common findings are pronounced muscular hypotonia, intractable epilepsy, global developmental delay/intellectual disability, and early death. Additional features that may be observed include apnoea and respiratory deficiency, cataracts, joint contractures, vermian hypoplasia, dysmorphic features (esotropia, arched palate, micrognathia, finger clinodactyly, single flexion creases) and feeding difficulties.

Myasthenic syndrome, congenital, 13, with tubular aggregates, MIM 614750 is a milder allelic disorder. More than 5 unrelated families reported with this presentation.
Mendeliome v0.5553 MINPP1 Zornitza Stark gene: MINPP1 was added
gene: MINPP1 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: MINPP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: MINPP1 were set to 33257696
Phenotypes for gene: MINPP1 were set to Pontocerebellar hypoplasia
Review for gene: MINPP1 was set to GREEN
Added comment: 8 individuals from 6 unrelated families reported with bi-allelic LOF variants. All presented with almost complete absence of motor and cognitive development, progressive or congenital microcephaly, spastic tetraplegia or dystonia, and vision impairments. For most, the first symptoms included neonatal severe axial hypotonia and epilepsy that started during the first months or years of life. Prenatal symptoms of microcephaly associated with increased thalami echogenicity were detected in one, while the seven other individuals presented with progressive microcephaly. Some exhibited rapidly progressive phenotype and the affected children died in their infancy or middle-childhood. Strikingly, all the affected children had a unique brain MRI showing a mild to severe PCH, fluid-filled posterior fossa, with dilated lateral ventricles. In addition, severe atrophy at the level of the basal ganglia or thalami often associated with typical T2 hypersignal were identified in all the patients MRI.

Supportive functional data showing accumulation of highly phosphorylated inositols, mostly inositol hexakisphosphate (IP6), detected in HEK293 cells, fibroblasts, iPSCs and differentiating neurons lacking MINPP1. In mutant cells, higher IP6 level is expected to be associated with an increased chelation of intracellular cations, such as iron or calcium, resulting in decreased levels of available ions.
Sources: Literature
Mendeliome v0.5376 MYRF Zornitza Stark changed review comment from: Cardiac-urogenital syndrome is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.; to: Cardiac-urogenital syndrome MIM# 618280 is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.
Mendeliome v0.5376 MYRF Zornitza Stark edited their review of gene: MYRF: Added comment: Cardiac-urogenital syndrome is characterized by partial anomalous pulmonary venous return in association with tracheal anomalies, pulmonary hypoplasia, congenital diaphragmatic hernia, thyroid fibrosis, thymic involution, cleft spleen, penoscrotal hypospadias, and cryptorchidism. More than 10 unrelated individuals reported.; Changed publications: 31048900, 31172260, 31266062, 31700225, 29446546, 29446546, 30532227, 31069960; Changed phenotypes: Nanophthalmos and high hyperopia, Cardiac-urogenital syndrome, MIM# 618280
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
Mendeliome v0.4832 NEK9 Zornitza Stark Phenotypes for gene: NEK9 were changed from Lethal congenital contracture syndrome 10, MIM# 617022; Skeletal dysplasia to Lethal congenital contracture syndrome 10, MIM# 617022; Arthrogryposis, Perthes disease, and upward gaze palsy, MIM# 614262; Skeletal dysplasia
Mendeliome v0.4829 NEK9 Zornitza Stark edited their review of gene: NEK9: Added comment: Another Saudi family described with which 2 sisters and a female cousin who had a similar disorder characterised by arthrogryposis apparent since early childhood, avascular necrosis of the hip (Perthes disease), and upward gaze palsy. Homozygous missense variant segregated with the phenotype. Given the small number of reports, it is unclear whether this represents a distinct association is part of a spectrum with includes the more severe phenotype described in the Irish traveller families.; Changed publications: 26908619, 21271645; Changed phenotypes: Lethal congenital contracture syndrome 10, MIM# 617022, Arthrogryposis, Perthes disease, and upward gaze palsy, MIM# 614262, Skeletal dysplasia
Mendeliome v0.4664 FOXL2 Ain Roesley changed review comment from: PMID: 31077882; 19x probands reported, AD.

PMID: 18642388;
BPES type I : Mutations predicted to result in proteins with truncation before the poly-Ala tract
BPES type II: poly-Ala expansions (WT poly-Ala is between aa 221-234)
Exceptions: Truncated proteins with complete forkhead and poly-Ala domains, can be either Type I and II

NOTE: only 1 family reported for AR (PMID: 17089161); to: PMID: 31077882; >100 probands reported, AD.

PMID: 18642388;
BPES type I : Mutations predicted to result in proteins with truncation before the poly-Ala tract
BPES type II: poly-Ala expansions (WT poly-Ala is between aa 221-234)
Exceptions: Truncated proteins with complete forkhead and poly-Ala domains, can be either Type I and II

NOTE: only 1 family reported for AR (PMID: 17089161)
Mendeliome v0.4507 DSTYK Zornitza Stark Phenotypes for gene: DSTYK were changed from to Congenital anomalies of kidney and urinary tract 1, MIM# 610805; Spastic paraplegia 23, MIM# 270750
Mendeliome v0.4504 DSTYK Zornitza Stark reviewed gene: DSTYK: Rating: GREEN; Mode of pathogenicity: None; Publications: 23862974, 23862974, 28618409, 28157540, 23862974; Phenotypes: Congenital anomalies of kidney and urinary tract 1, MIM# 610805, Spastic paraplegia 23, MIM# 270750; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.4503 ZMYM2 Zornitza Stark gene: ZMYM2 was added
gene: ZMYM2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ZMYM2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ZMYM2 were set to 32891193
Phenotypes for gene: ZMYM2 were set to Congenital anomalies of kidney and urinary tract; Neurodevelopmental disorder
Review for gene: ZMYM2 was set to GREEN
Added comment: Heterozygous pathogenic (pLoF) ZMYM2 variants have been reported in individuals with syndromic presentation including CAKUT (in several cases) and variable neurological manifestations among extra-renal features.

--

Connaughton et al (2020 - PMID: 32891193) report on 19 individuals (from 15 unrelated families) with heterozygous pathogenic ZMYM2 variants.

Affected individuals from 7 families presented with CAKUT while all of them displayed extra-renal features. Neurological manifestations were reported in 16 individuals from 14 families (data not available for 1 fam), among others hypotonia (3/14 fam), speech delay (4/14 fam), global DD (9/14 fam), ID (4/14 fam), microcephaly (4/14 fam). ASD was reported in 4 fam (4 indiv). Seizures were reported in 2 fam (2 indiv). Variable other features included cardiac defects, facial dysmorphisms, small hands and feet with dys-/hypo-plastic nails and clinodactyly.

14 pLoF variants were identified, in most cases as de novo events (8 fam). In 2 families the variant was inherited from an affected parent. Germline mosaicism occurred in 1 family.

The human disease features were recapitulated in a X. tropicalis morpholino knockdown, with expression of truncating variants failing to rescue renal and craniofacial defects. Heterozygous Zmym2-deficient mice also recapitulated the features of CAKUT.

ZMYM2 (previously ZNF198) encodes a nuclear zinc finger protein localizing to the nucleus (and PML nuclear body).

It has previously been identified as transcriptional corepressor interacting with nuclear receptors and the LSD1-CoREST-HDAC1 complex. It has also been shown to interact with FOXP transcription factors.

The authors provide evidence for loss of interaction of the truncated ZMYM2 with FOXP1 (mutations in the latter having recently been reported in syndromic CAKUT).
Sources: Literature
Mendeliome v0.4320 CACNA1E Zornitza Stark changed review comment from: At least 30 unrelated patients reported with heterozygous variants in this gene; primarily a seizure disorder, often with profound intellectual disability.; to: At least 30 unrelated patients reported with heterozygous variants in this gene; primarily a seizure disorder, often with profound intellectual disability. Additional common features included spastic quadriplegia, hyperreflexia, hyperkinetic movements, dystonia, myoclonus, clonus, poor or absent eye contact, nystagmus, cortical visual impairment, and loss of head control. Thirteen patients had congenital contractures and 13 had macrocephaly.
Mendeliome v0.4256 SVIL Melanie Marty edited their review of gene: SVIL: Added comment: Four patients from two unrelated consanguineous families with a childhood/adolescence onset of a myopathy associated with homozygous loss-of-function mutations in SVIL. Wide neck, anteverted shoulders and prominent trapezius muscles together with variable contractures were characteristic features. Functional studies on muscle biopsies showed complete loss protein in muscle fibres by western blot.; Changed rating: AMBER
Mendeliome v0.4250 SVIL Melanie Marty gene: SVIL was added
gene: SVIL was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SVIL was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SVIL were set to 32779703
Phenotypes for gene: SVIL were set to myopathy
Penetrance for gene: SVIL were set to unknown
Review for gene: SVIL was set to GREEN
Added comment: Four patients from two unrelated consanguineous families with a childhood/adolescence onset of a myopathy associated with homozygous loss-of-function mutations in SVIL. Wide neck, anteverted shoulders and prominent trapezius muscles together with variable contractures were characteristic features. Functional studies on muscle biopsies showed complete loss protein in muscle fibres by western blot.
Sources: Literature
Mendeliome v0.4250 CFAP58 Crystle Lee gene: CFAP58 was added
gene: CFAP58 was added to Mendeliome. Sources: Expert Review
Mode of inheritance for gene: CFAP58 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: CFAP58 were set to 32791035
Phenotypes for gene: CFAP58 were set to Multiple morphological abnormalities of the sperm flagella (MMAF) (PMID: 32791035)
Review for gene: CFAP58 was set to AMBER
Added comment: 5 unrelated males reported with biallelic loss of function variants. Knockout mice were infertile (Abstract only)
Sources: Expert Review
Mendeliome v0.3693 SLC25A10 Zornitza Stark Phenotypes for gene: SLC25A10 were changed from Intractable epileptic encephalopathy to Intractable epileptic encephalopathy; Mitochondrial DNA depletion syndrome 19, MIM# 618972
Mendeliome v0.3692 SLC25A10 Zornitza Stark edited their review of gene: SLC25A10: Changed phenotypes: Intractable epileptic encephalopathy, Mitochondrial DNA depletion syndrome 19, MIM# 618972
Mendeliome v0.3645 NCKAP1L Michelle Torres gene: NCKAP1L was added
gene: NCKAP1L was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NCKAP1L was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NCKAP1L were set to 32647003
Phenotypes for gene: NCKAP1L were set to Immunodeficiency
Review for gene: NCKAP1L was set to GREEN
Added comment: 5 patients from 4 families with recurrent bacterial and viral skin infections, severe respiratory tract infections leading to pneumonia and bronchiectasis. Functional of the 4 missense reported were performed.
Sources: Literature
Mendeliome v0.3376 GIPC1 Zornitza Stark gene: GIPC1 was added
gene: GIPC1 was added to Mendeliome. Sources: Literature
5'UTR, STR tags were added to gene: GIPC1.
Mode of inheritance for gene: GIPC1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: GIPC1 were set to 32413282
Phenotypes for gene: GIPC1 were set to Oculopharyngodistal myopathy-2 (OPDM2), MIM#618940
Review for gene: GIPC1 was set to AMBER
Added comment: 19 families reported with heterozygous trinucleotide repeat expansion in the 5-prime untranslated region and onset of distal muscle weakness, mainly of the lower limbs, and/or ophthalmoplegia in the second or third decades of life. Note this is unlikely to be tractable currently by most NGS assays.
Sources: Literature
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
Mendeliome v0.3303 PIP5K1C Zornitza Stark Phenotypes for gene: PIP5K1C were changed from to Lethal congenital contractural syndrome 3, MIM# 611369
Mendeliome v0.3299 PIP5K1C Zornitza Stark reviewed gene: PIP5K1C: Rating: AMBER; Mode of pathogenicity: None; Publications: 17701898; Phenotypes: Lethal congenital contractural syndrome 3, MIM# 611369; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3299 ERBB3 Zornitza Stark Phenotypes for gene: ERBB3 were changed from to Lethal congenital contractural syndrome 2, MIM# 607598
Mendeliome v0.3295 ERBB3 Zornitza Stark reviewed gene: ERBB3: Rating: AMBER; Mode of pathogenicity: None; Publications: 17701904, 31752936; Phenotypes: Lethal congenital contractural syndrome 2, MIM# 607598; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3268 P4HA1 Zornitza Stark gene: P4HA1 was added
gene: P4HA1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: P4HA1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: P4HA1 were set to 28419360
Phenotypes for gene: P4HA1 were set to Joint hypermobility; Contractures; Hypotonia; Mild skeletal dysplasia without bone fragility; High myopia
Review for gene: P4HA1 was set to RED
Added comment: Single family reported with two affected individuals.
Sources: Expert list
Mendeliome v0.3150 GOLGA2 Elena Savva gene: GOLGA2 was added
gene: GOLGA2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: GOLGA2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: GOLGA2 were set to PMID: 30237576; 26742501
Phenotypes for gene: GOLGA2 were set to Nueromuscular disorder
Review for gene: GOLGA2 was set to GREEN
Added comment: PMID: 30237576 - One 11 year old patient with a homozygous PTC.
Patient had global dev delay, microcephaly, distal muscle weakness with joint contractures and elevated CK levels. Muscle biopsy showed dystrophin changes. MRI at 2 years old showed brain atrophy with thin corpus callosum and hypomyelination. No seizures or regression.

PMID: 26742501 - One infant with a homozygous PTC.
Patient had dev delay, seizures, microcephaly and muscular dystrophy. Zebrafish null model recapitulates the human phenotype with microcephaly and skeletal muscle disorganization.

Summary: 2 patients + animal model
Sources: Expert list
Mendeliome v0.3105 NEK9 Zornitza Stark Phenotypes for gene: NEK9 were changed from to Lethal congenital contracture syndrome 10, MIM# 617022; Skeletal dysplasia
Mendeliome v0.3101 NEK9 Zornitza Stark reviewed gene: NEK9: Rating: RED; Mode of pathogenicity: None; Publications: 26908619; Phenotypes: Lethal congenital contracture syndrome 10, MIM# 617022, Skeletal dysplasia; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.3017 PERP Zornitza Stark gene: PERP was added
gene: PERP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: PERP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PERP were set to 31898316
Phenotypes for gene: PERP were set to Erythrokeratoderma, no OMIM # yet
Review for gene: PERP was set to AMBER
Added comment: One extended multiplex consanguineous family with Erythrokeratoderma (striking similarity to that observed in Perp −/− mice), and a novel homozygous variant (c.466G>A; p.Gly156Arg) in PERP that fully segregated with the phenotype. Functional analysis of patient‐ and control‐derived keratinocytes revealed a deleterious effect of the identified variant on the intracellular localization of PERP. A previous report showed that PERP mutation causes a dominant form of keratoderma but a single patient in that report with a homozygous variant in PERP suggests that recessive inheritance is also possible.
Sources: Literature
Mendeliome v0.3015 ADCY6 Zornitza Stark gene: ADCY6 was added
gene: ADCY6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: ADCY6 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ADCY6 were set to 24319099; 26257172; 31846058
Phenotypes for gene: ADCY6 were set to Lethal congenital contracture syndrome 8, OMIM # 616287
Review for gene: ADCY6 was set to GREEN
Added comment: Laquerriere et al. (2014): 2 sibs from a consanguineous family with an axoglial form of lethal congenital contracture syndrome, and homozygous missense ADCY6 mutation (R1116C). The parents were heterozygous for the mutation. Knocked down ADCY6 orthologs in zebrafish showed a loss of myelin basic protein expression in the peripheral nervous system but no defects in Schwann cell migration and axonal growth. Gonzaga‐Jauregui et al. (2015): 1 patient with congenital hypotonia, distal joint contractures, hypomyelinating neuropathy, and vocal cord paralysis, and a homozygous missense ADCY6 variant. No functional studies. Deceased sister with a similar phenotype with hypotonia, areflexia, and hypomyelinating neuropathy who died at 18 months of respiratory insufficiency. Agolini et al. (2020): 1 patient with severe form of AMC, with two novel compound heterozygous variants in ADCY6 (parents confirmed carriers), but no functional studies.
Sources: Literature
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
Mendeliome v0.2973 TOR1AIP1 Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness; Contractures
Mendeliome v0.2972 TOR1AIP1 Zornitza Stark Phenotypes for gene: TOR1AIP1 were changed from Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072 to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072; Progeroid appearance; Cataracts; Microcephaly; Deafness
Mendeliome v0.2889 ARL3 Bryony Thompson gene: ARL3 was added
gene: ARL3 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: ARL3 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: ARL3 were set to 30269812; 16565502; 26964041; 30932721
Phenotypes for gene: ARL3 were set to Joubert syndrome 35 MIM#618161; Retinitis pigmentosa 83 MIM#618173
Review for gene: ARL3 was set to GREEN
Added comment: 4 patients from 2 unrelated consanguineous families with a phenotype resembling Joubert syndrome with homozygous missense mutations affecting the same residue (R149C, R149H), and supporting in vitro functional assays. All reported cases had rod-cone dystrophy. An Arl3 null mouse model has a ciliary disease phenotype affecting the kidney, biliary tract, pancreas, and retina.
Two unrelated families with retinitis pigmentosa segregating the same heterozygous missense variant (Y90C).
Sources: Expert list
Mendeliome v0.2549 GAD1 Zornitza Stark edited their review of gene: GAD1: Added comment: 2020: 11 individuals from 6 consanguineous families reported with bi-allelic LOF variant and a developmental/epileptic encephalopathy. Seizure onset occurred in the first 2 months of life in all. All 10 individuals, from whom early disease history was available, presented with seizure onset in the first month of life, mainly consisting of epileptic spasms or myoclonic seizures. Early EEG showed suppression-burst or pattern of burst attenuation or hypsarrhythmia if only recorded in the post-neonatal period. Eight individuals had joint contractures and/or pes equinovarus. Seven presented a cleft palate and two also had an omphalocele, reproducing the phenotype of the knockout Gad1−/− mouse model. Four individuals died before 4 years of age.; Changed rating: GREEN; Changed publications: 15571623, 32282878; Changed phenotypes: Cerebral palsy, spastic quadriplegic, 1, MIM#603513, Developmental and epileptic encephalopathy
Mendeliome v0.2452 SEC31A Zornitza Stark Phenotypes for gene: SEC31A were changed from congenital neurodevelopmental syndrome; spastic paraplegia; multiple contractures; profound developmental delay; epilepsy; failure to thrive to Neurodevelopmental disorder with spastic quadriplegia, optic atrophy, seizures, and structural brain anomalies, MIM# 618651; congenital neurodevelopmental syndrome; spastic paraplegia; multiple contractures; profound developmental delay; epilepsy; failure to thrive
Mendeliome v0.2440 ORAI1 Natalie Tan reviewed gene: ORAI1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 31448844; Phenotypes: Progressive myopathy, contractures; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.2378 SEC31A Hazel Phillimore gene: SEC31A was added
gene: SEC31A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SEC31A was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SEC31A were set to PMID: 30464055
Phenotypes for gene: SEC31A were set to congenital neurodevelopmental syndrome; spastic paraplegia; multiple contractures; profound developmental delay; epilepsy; failure to thrive
Review for gene: SEC31A was set to AMBER
Added comment: Frameshift. c.2776_2777, TA duplication, causing predicted p.A927fs*61 truncation and predicted NMD in 2 affected siblings in consanguineous Bedouin family with severe congenital neurological syndrome with spastic paraplegia, multiple contractures, profound developmental delay and convulsions. Failure to thrive. Lethal by age 4 years. Also had hearing defect, bilateral congenital cataract, horizontal nystagmus, with flat retina and optic atrophy. Supporting functional assays from knockout drosophila.
Sources: Literature
Mendeliome v0.2216 SOX11 Zornitza Stark Phenotypes for gene: SOX11 were changed from to Coffin-Siris syndrome 9, MIM# 615866; Congenital abnormalities of the kidneys and urinary tract
Mendeliome v0.2213 SOX11 Zornitza Stark edited their review of gene: SOX11: Changed rating: GREEN; Changed phenotypes: Coffin-Siris syndrome 9, MIM# 615866, Congenital abnormalities of the kidneys and urinary tract
Mendeliome v0.1850 FBN2 Zornitza Stark Added comment: Comment when marking as ready: The gene-disease association with Contractual arachnodactyly is extremely well established. The gene-disease association with macular degeneration much less so. There are ~4 families reported in the literature, and some discussion about whether the contribution of rare FBN2 variants in this context are under a 'monogenic' or 'polygenic' model.
Mendeliome v0.1849 FBN2 Zornitza Stark Phenotypes for gene: FBN2 were changed from to Contractural arachnodactyly, congenital 121050; Macular degeneration, early-onset 616118
Mendeliome v0.1842 ADGRG6 Zornitza Stark edited their review of gene: ADGRG6: Added comment: Three families reported originally with severe prenatal-onset arthrogryposis (PMID: 26004201), one family with more complex neurological phenotype (PMID:30549416).; Changed rating: GREEN; Changed publications: 30549416, 26004201; Changed phenotypes: Lethal congenital contracture syndrome 9, OMIM #616503; Changed mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Mendeliome v0.1842 FBN2 Elena Savva reviewed gene: FBN2: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID 19473076, 11068201; Phenotypes: Contractural arachnodactyly, congenital 121050, Macular degeneration, early-onset 616118; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown; Current diagnostic: yes
Mendeliome v0.1834 NRROS Sue White gene: NRROS was added
gene: NRROS was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NRROS was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NRROS were set to 32100099; 32197075
Phenotypes for gene: NRROS were set to neurodegeneration; intracranial calcification; epilepsy
Penetrance for gene: NRROS were set to Complete
Review for gene: NRROS was set to GREEN
Added comment: normal development or mild developmental delay until onset of regression around age of 1 concurrent with epilepsy
biallelic LOF mutations with functional evidence of pathogenicity
Sources: Literature
Mendeliome v0.1821 SLC25A10 Zornitza Stark gene: SLC25A10 was added
gene: SLC25A10 was added to Mendeliome. Sources: NHS GMS
Mode of inheritance for gene: SLC25A10 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLC25A10 were set to 29211846
Phenotypes for gene: SLC25A10 were set to Intractable epileptic encephalopathy
Review for gene: SLC25A10 was set to AMBER
Added comment: One case with intractable epileptic encephalopathy with complex I deficiency, with biallelic variants. Yeast SLC25A10 ortholog lack-of-function causes impairment in mitochondrial respiration, reduced mtDNA copy number and oxidative stress vulnerability.
Sources: NHS GMS
Mendeliome v0.1338 TOR1AIP1 Bryony Thompson gene: TOR1AIP1 was added
gene: TOR1AIP1 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: TOR1AIP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TOR1AIP1 were set to 24856141; 31299614; 30723199; 27342937
Phenotypes for gene: TOR1AIP1 were set to Muscular dystrophy, autosomal recessive, with rigid spine and distal joint contractures MIM#617072
Review for gene: TOR1AIP1 was set to GREEN
Added comment: At least 5 families/cases reported with muscular dystrophy and sometimes cardiomyopathy.
Sources: Expert list
Mendeliome v0.807 BNC2 Zornitza Stark gene: BNC2 was added
gene: BNC2 was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: BNC2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: BNC2 were set to 31656805; 31051115
Phenotypes for gene: BNC2 were set to Lower urinary tract obstruction, congenital; OMIM #618612
Review for gene: BNC2 was set to GREEN
gene: BNC2 was marked as current diagnostic
Added comment: At least four unrelated families reported.
Sources: Expert list
Mendeliome v0.788 TDP2 Zornitza Stark gene: TDP2 was added
gene: TDP2 was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TDP2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TDP2 were set to 31410782; 30109272; 24658003
Phenotypes for gene: TDP2 were set to Spinocerebellar ataxia, autosomal recessive 23; OMIM #616949
Review for gene: TDP2 was set to GREEN
Added comment: ID is part of the phenotype: 4 families with 6 affected patients, with functional evidence.

1 family with 3 affected sibs with homozygous splice site mutation in the TDP2 gene. Patient cell extracts showed absence of the full-length TDP2 protein and absence of 5-prime TDP activity, consistent with a loss of function, although 3-prime TDP activity, conferred by TDP1, was normal. In addition, patient lymphoblastoid cells were hypersensitive to the TOP2 poison etoposide. The findings indicated impaired capacity for double-strand break repair.

1 unrelated Egyptian patient with a similar disorder was homozygous for a truncating mutation in the TDP2 gene

1 unrelated Caucasian patient with same homozygous splice site mutation in the TDP2 gene. Western blot analysis did not detect TDP2 protein in patient primary skin fibroblasts. Patient fibroblasts showed an inability to rapidly repair topoisomerase-induced DNA double-strand breaks in the nucleus and also showed a profound hypersensitivity to this type of DNA damage. Complementation of patient cells with recombinant human TDP2 restored normal rates of nuclear DSB repair.
Sources: Expert list
Mendeliome v0.757 TRAC Zornitza Stark Marked gene: TRAC as ready
Mendeliome v0.757 TRAC Zornitza Stark Gene: trac has been classified as Green List (High Evidence).
Mendeliome v0.757 TRAC Zornitza Stark Classified gene: TRAC as Green List (high evidence)
Mendeliome v0.757 TRAC Zornitza Stark Gene: trac has been classified as Green List (High Evidence).
Mendeliome v0.756 TRAC Zornitza Stark gene: TRAC was added
gene: TRAC was added to Mendeliome_VCGS. Sources: Expert list
Mode of inheritance for gene: TRAC was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: TRAC were set to 21206088
Phenotypes for gene: TRAC were set to Immunodeficiency 7, TCR-alpha/beta deficient, MIM#615387
Review for gene: TRAC was set to GREEN
Added comment: Sources: Expert list
Mendeliome v0.278 ADGRG6 Zornitza Stark Phenotypes for gene: ADGRG6 were changed from to Lethal congenital contracture syndrome 9; OMIM #616503
Mendeliome v0.43 ZNF526 Zornitza Stark Added comment: Comment on list classification: Found unpublished abstract linking to AR intellectual disability in consanguineous Iranian population, no functional data provided.