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| Mendeliome v1.1888 | CRNKL1 |
Mark Cleghorn gene: CRNKL1 was added gene: CRNKL1 was added to Mendeliome. Sources: Other Mode of inheritance for gene: CRNKL1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Phenotypes for gene: CRNKL1 were set to complex neurodevelopmental disorder MONDO:0100038 Review for gene: CRNKL1 was set to GREEN Added comment: Unpublished, presented at ESHG June 2024 - Louise Bicknell, University of Otago NZ 8 unrelated families via gene matcher with rare, de novo, missense variants in CRNKL1 severe microcephaly (all, -8 to -11 SD) ID/epilepsy pontocerebellar hypoplasia (6/8) simplified gyration (8/8) 7 variants are missense at p.Arg267 residue 1 variant missense at p.Arg301 RNA-seq on patient fibroblasts - no alteration in gene expression Zebrafish homolog of Arg267 and Arg301 - mimics observed phenotype (reduced brain development), increased in embryo apoptosis RNA seq on affected zebrafish embryos - transcriptome strongly disrupted Splicing analysis in progress CRKNL1 supports U6 structure in spliceosome Sources: Other |
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| Mendeliome v1.1884 | MYZAP |
Zornitza Stark changed review comment from: 10 individuals from four unrelated families with bi-allelic variants in this gene with DCM. Supportive zebrafish model. Note the MYZAP and GCOM1 genes are part of the GRINL1A complex transcription unit. Some of the reported variants affect GCOM1 with postulated effect on MYZAP due to read through transcription (two families), and in the rest of the families MYZAP was affected directly. Sources: Literature; to: 10 individuals from four unrelated families with bi-allelic variants in this gene with DCM. Supportive zebrafish model. The MYZAP gene is part of the GRINL1A complex transcription unit (CTU), or GCOM1, which also includes the downstream POLR2M gene, or GRINL1A.. Some of the reported variants affect GCOM1 with postulated effect on MYZAP due to read through transcription (two families), and in the rest of the families MYZAP was affected directly. Transcription from an upstream promoter within the GRINL1A CTU produces 2 types of alternatively spliced transcripts: MYZAP transcripts, also called GRINL1A upstream (GUP) transcripts, which include only exons from the MYZAP gene, and GRINL1A combined (GCOM) transcripts, which include exons from both the MYZAP gene and the downstream POLR2M gene. Transcription of the POLR2M gene initiates at a downstream promoter within the GRINL1A CTU and produces alternatively spliced POLR2M transcripts, also called GRINL1A downstream (GDOWN) transcripts, which include only exons from the POLR2M gene Sources: Literature |
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| Mendeliome v1.1883 | MYZAP |
Zornitza Stark gene: MYZAP was added gene: MYZAP was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MYZAP was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MYZAP were set to 34899865; 35840178; 38436102; 20093627 Phenotypes for gene: MYZAP were set to Cardiomyopathy, dilated, 2K, MIM# 620894 Review for gene: MYZAP was set to GREEN Added comment: 10 individuals from four unrelated families with bi-allelic variants in this gene with DCM. Supportive zebrafish model. Note the MYZAP and GCOM1 genes are part of the GRINL1A complex transcription unit. Some of the reported variants affect GCOM1 with postulated effect on MYZAP due to read through transcription (two families), and in the rest of the families MYZAP was affected directly. Sources: Literature |
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| Mendeliome v1.1790 | ZNF41 |
Zornitza Stark gene: ZNF41 was added gene: ZNF41 was added to Mendeliome. Sources: Expert Review disputed tags were added to gene: ZNF41. Mode of inheritance for gene: ZNF41 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: ZNF41 were set to 14628291; 23871722 Phenotypes for gene: ZNF41 were set to non-syndromic X-linked intellectual disability MONDO:0019181 Review for gene: ZNF41 was set to RED Added comment: DISPUTED by ClinGen. Shoichet et al. (2003) described a female patient with severe nonsyndromic mental retardation and a de novo balanced translocation t(X;7)(p11.3;q11.21) in whom they cloned the DNA fragment that contained the X chromosomal and the autosomal breakpoint. In silico sequence analysis demonstrated that the ZNF41 gene was disrupted. Expression studies indicated that ZNF41 transcripts were absent in the patient cell line, suggesting that the mental disorder in this patient resulted from loss of functional ZNF41. Screening of patients with mental retardation led to the identification of 2 other ZNF41 mutations that were not found in healthy control individuals. Based on their finding of the mutations in ZNF41 identified by Shoichet et al. (2003) in a total of 7 males in the NHLBI Exome Variant Server, and the additional finding of truncating ZNF41 variants in 1 male and 1 female in that database, Piton et al. (2013) classified the involvement of ZNF41 in mental retardation as highly questionable. Sources: Expert Review |
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| Mendeliome v1.1733 | SUPT7L |
Chirag Patel gene: SUPT7L was added gene: SUPT7L was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SUPT7L was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: SUPT7L were set to PMID: 38592547 Phenotypes for gene: SUPT7L were set to Lipodystrophy, MONDO:0006573 Review for gene: SUPT7L was set to RED Added comment: 1 case with generalised lipodystrophy, growth retardation, congenital cataracts, severe developmental delay and progeriod features. Trio WGS identified compound heterozygous variants in SUPT7L (missense causing abnormal splicing + frameshift). Variants validated with Sanger. SUPT7L encodes a component of the core structural module of the STAGA complex - a nuclear multifunctional protein complex that plays a role in various cellular processes (e.g. transcription factor binding, protein acetylation, splicing, and DNA damage control). Immunolabelling in fibroblasts from patient showed complete absence of SUPT7L protein. Transcriptome data from individual revealed downregulation of several gene sets associated with DNA replication, DNA repair, cell cycle, and transcription. Sources: Literature |
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| Mendeliome v1.1633 | USP14 |
Zornitza Stark gene: USP14 was added gene: USP14 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: USP14 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: USP14 were set to 38469793; 35066879 Phenotypes for gene: USP14 were set to Syndromic disease MONDO:0002254, USP14-related Review for gene: USP14 was set to GREEN Added comment: PMID 35066879: 3 fetuses from 2 different branches of a consanguineous family, presenting with distal arthrogryposis, underdevelopment of the corpus callosum, and dysmorphic facial features. Exome sequencing identified a biallelic 4-bp deletion (c.233_236delTTCC; p.Leu78Glnfs*11) in USP14, and sequencing of family members showed segregation with the phenotype. Ubiquitin-specific protease 14 (USP14) encodes a major proteasome-associated deubiquitinating enzyme with an established dual role as an inhibitor and an activator of proteolysis, maintaining protein homeostasis. Usp14-deficient mice show a phenotype similar to lethal human multiple congenital contractures phenotypes, with callosal anomalies, muscle wasting, and early lethality, attributed to neuromuscular junction defects due to decreased monomeric ubiquitin pool. RT-qPCR experiment in an unaffected heterozygote revealed that mutant USP14 was expressed, indicating that abnormal transcript escapes nonsense-mediated mRNA decay. PMID 38469793: biallelic USP14 variants in four individuals from three unrelated families: one fetus, a newborn with a syndromic NDD, and two siblings affected by a progressive neurological disease. Specifically, the two siblings from the latter family carried two compound heterozygous variants c.8T>C p.(Leu3Pro) and c.988C>T p.(Arg330*), while the fetus had a homozygous frameshift c.899_902del p.(Lys300Serfs*24) variant and the newborn patient harbored a homozygous frameshift c.233_236del p.(Leu78Glnfs*11) variant. The fetus and the newborn had extensive brain malformations. Sources: Literature |
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| Mendeliome v1.1630 | PRDX1 |
Bryony Thompson gene: PRDX1 was added gene: PRDX1 was added to Mendeliome. Sources: Literature digenic tags were added to gene: PRDX1. Mode of inheritance for gene: PRDX1 was set to Other Publications for gene: PRDX1 were set to 29302025; 35190856 Phenotypes for gene: PRDX1 were set to methylmalonic aciduria and homocystinuria type cblC MONDO:0010184 Mode of pathogenicity for gene: PRDX1 was set to Other Review for gene: PRDX1 was set to GREEN Added comment: Only variants affecting the canonical splice acceptor site of intron 5 (e.g. c.515-1G-T, c.515-2A-T) that cause skipping of exon 6 and the polyA termination signal of PRDX1 produce an MMACHC epimutation. The resulting read-through transcript extends through the adjacent MMACHC locus in the antisense orientation. These PRDX1 exon 6 acceptor splice site variants cause disease through digenic inheritance with a pathogenic MMACHC on the other allele. Sources: Literature |
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| Mendeliome v1.1587 | APOLD1 |
Lucy Spencer changed review comment from: PMID: 35638551 1 family with an atypical inherited bleeding disorder characterised by severe spontaneous bleeding episodes in childhood and microcirculatory problems. 4 affected individuals across 2 generations have R49*in APOLD1, another affected individual from a third generation was not able to be sequenced = 4 meiosis. 4 unaffected individuals did not have the variant. This gene has no NMD region, R49* would affect 82% of the protein. Paper is not using the MANE select transcript, alt p. in MANE select is R18* which affects 92% of the MANE select protein Interestingly R49* is created by a delins/2 missense in cis, 1 common R49Q and 1 rare R49W, some UNaffected family members just have the common missense without the other in cis. Immunofluorescence studies in patient platelets showed a 50% reduction of APOLD1 and disrupted cytoskeletal and junctional organization. Sources: Literature; to: PMID: 35638551 1 family with an atypical inherited bleeding disorder characterised by severe spontaneous bleeding episodes in childhood and microcirculatory problems. 4 affected individuals across 2 generations have R49*in APOLD1, another affected individual from a third generation was not able to be sequenced = 4 meiosis. 4 unaffected individuals did not have the variant. This gene has no NMD region, R49* would affect 82% of the protein. Paper is not using the MANE select transcript, alt p. in MANE select is R18* which affects 92% of the MANE select protein Interestingly R49* is created by a delins/2 missense in cis, 1 common R49Q and 1 rare R49W, some UNaffected family members just have the common missense without the other in cis. Immunofluorescence studies in patient platelets showed a 50% reduction of APOLD1 and disrupted cytoskeletal and junctional organization. SiRNA silencing of APOLD1 in HBDEC cells resulted in altered cell shape and size, and were associated with endothelial cell junction dismantling. These cells were also almost devoid of VWF. Sources: Literature |
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| Mendeliome v1.1584 | APOLD1 |
Lucy Spencer gene: APOLD1 was added gene: APOLD1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: APOLD1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: APOLD1 were set to 35638551 Phenotypes for gene: APOLD1 were set to Bleeding disorder, vascular-type (MIM#620715) Review for gene: APOLD1 was set to AMBER Added comment: PMID: 35638551 1 family with an atypical inherited bleeding disorder characterised by severe spontaneous bleeding episodes in childhood and microcirculatory problems. 4 affected individuals across 2 generations have R49*in APOLD1, another affected individual from a third generation was not able to be sequenced = 4 meiosis. 4 unaffected individuals did not have the variant. This gene has no NMD region, R49* would affect 82% of the protein. Paper is not using the MANE select transcript, alt p. in MANE select is R18* which affects 92% of the MANE select protein Interestingly R49* is created by a delins/2 missense in cis, 1 common R49Q and 1 rare R49W, some UNaffected family members just have the common missense without the other in cis. Immunofluorescence studies in patient platelets showed a 50% reduction of APOLD1 and disrupted cytoskeletal and junctional organization. Sources: Literature |
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| Mendeliome v1.1576 | ZFX |
Zornitza Stark gene: ZFX was added gene: ZFX was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZFX was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: ZFX were set to 26350204; 26740508; 38325380 Phenotypes for gene: ZFX were set to Neurodevelopmental disorder, MONDO:0700092, ZFX-related Review for gene: ZFX was set to GREEN Added comment: A single ZFX variant has been associated with a neurodevelopmental disorder, that has a Rett syndrome-like phenotype disorder, in a 14 year old male. The ZFX variant was allelic with another X-linked variant in SHROOM4. These variants were inherited from the mother, who had random X inactivation pattern (PMID: 26740508). PMID: 38325380 reports 11 ZFX variants in 18 subjects from 16 unrelated families (14 males and 4 females) with an X-linked neurodevelopmental disorder with recurrent facial gestalt. Seven variants were truncating and the remaining were missense variants within the Zinc finger array. In the pedigree of family 6 (figure 3, PMID: 38325380), it was apparent that there were female carriers of the ZFX variant (GRCh38 chrX: 24229396A>G, c.2438A>G, p.Tyr774Cys) with hyperparathyroidism and two affected males and one affected female, with the neurodevelopmental disorder. It appeared that skewed X-inactivation in the female carriers was responsible for the different phenotypic features. The association between ZFX variants and a novel neurodevelopmental disorder, was further supported by functional studies showing altered transcriptional activity in missense variants and altered behavior in a zebrafish loss-of-function model. Sources: Literature |
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| Mendeliome v1.1442 | LCK |
Zornitza Stark edited their review of gene: LCK: Added comment: Additional cases: PMID 38100037: Description of a second unrelated patient with novel biallelic missense LCK c.1393T>C, p.C465R variant in a patient from a consanguineous Syrian family with profound T-cell immune deficiency characterized by complete LCK protein expression deficiency and ensuing proximal TCR signaling-and CD4 and CD8-co-receptor-mediated functional and phenotypical defects. PMID: 27087313 reported 3 siblings of a consanguineous family presenting with recurrent pneumonia and severe viral skin disease leading to malignant transformation. The patients had an intronic LCK c.188-2A>G splice site variant resulting in skipping of exon 3 and mRNA decay. Clinical data alongside with CD4+ T-cell lymphocytopenia suggested a hypomorphic LCK deficiency.; Changed rating: GREEN; Changed publications: 22985903, 1579166, 11021796, 27087313, 38100037 |
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| Mendeliome v1.1396 | GRIA3 | Zornitza Stark edited their review of gene: GRIA3: Added comment: New manuscript describing ~40 individuals with variants in GRIA3, including affected females. Some variants demonstrated to be LoF and others GoF. LoF variants generally caused a milder phenotype.; Changed publications: 32977175, 17989220, 38038360; Changed mode of inheritance: X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.1335 | AGPAT3 |
Ee Ming Wong gene: AGPAT3 was added gene: AGPAT3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: AGPAT3 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: AGPAT3 were set to 37821758 Phenotypes for gene: AGPAT3 were set to Neurodevelopmental disorder (MONDO#0700092), AGPAT3-related Review for gene: AGPAT3 was set to GREEN gene: AGPAT3 was marked as current diagnostic Added comment: - Single consanguineous family with four individuals with severe intellectual disability and retinitis pigmentosa - All affected individuals were homozygous for a nonsense variant in AGPAT3, healthy unaffected individuals who were tested were heterozygous for the variant - Overexpression of mutant transcript revealed absence of AGPAT3 protein compared to WT transcript via Western blot analysis - KO AGPAT3 mouse demonstrated impaired neuronal migration Sources: Literature |
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| Mendeliome v1.1333 | DLG2 |
Elena Savva gene: DLG2 was added gene: DLG2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DLG2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: DLG2 were set to PMID: 37860969 Phenotypes for gene: DLG2 were set to Intellectual disability (MONDO#0001071), DLG2-related Review for gene: DLG2 was set to AMBER Added comment: PMID: 37860969 - 13 patients from 10 families with neurodevelopmental disorders, dysmorphic features and intragenic deletions including both exonic (minimal affect all transcripts) and UTR regions. Majority of variants were inherited, some de novo. But many NMD PTCs in gnomAD (some looking messy, in noncanonical transcript etc.) Sources: Literature |
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| Mendeliome v1.1103 | PSMC3 | Zornitza Stark edited their review of gene: PSMC3: Added comment: PMID:37256937 - 23 individuals with neurodevelopmental disorder was identified with 15 different de novo missense variants. Apart from one child (patient 2), all others had developmental delay characterised by speech delay (19/19) alone or with intellectual disability (16/18) and motor delay (15/19). In addition, structural modeling as well as proteomic and transcriptomic analyses of T cells derived from patients with PSMC3 variants implicated the PSMC3 variants in proteasome dysfunction through disruption of substrate translocation, induction of proteotoxic stress, and alterations in proteins controlling developmental and innate immune program.; Changed rating: GREEN; Changed publications: 32500975, 37256937; Changed phenotypes: neurodevelopmental disorder, MONDO:0700092, PSMC3-related, Deafness, cataract, impaired intellectual development, and polyneuropathy, MIM#619354; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.966 | ZNF808 |
Hazel Phillimore gene: ZNF808 was added gene: ZNF808 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ZNF808 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZNF808 were set to PMID: 37308312 Phenotypes for gene: ZNF808 were set to non-syndromic neonatal diabetes; MONDO:0016391 Review for gene: ZNF808 was set to GREEN Added comment: PMID: 37308312; Alqahtani, MA. et al. (2023) Clin Genet. doi: 10.1111/cge.14389. Three siblings in one consanguineous Saudi Arabian family with non-syndromic neonatal diabetes, all with a homozygous frameshift variant, NM_001321425.2:c.1448dupA, p.(Tyr483*), in ZNF808. (Same nucleotide and amino acid numbering as for the MANE SELECT transcript, NM_001039886.4). This variant has been entered as likely pathogenic in ClinVar by this group. This variant occurs in the last exon of the gene and is therefore not NMD-predicted. Instead it is predicted to cause a truncated protein. This paper shows a diagram with several other truncating variants in this exon, which were reported in the paper by De Franco, E. et al. (2021). (These patients also had low vitamin D levels, suggesting an association, and is consistent with other studies looking into loci that are associated with vitamin D). De Franco, E. et al. (2021) medRxiv 08.23.21262262. (Exeter, UK): Firstly, this group found a homozygous variant NM_001039886.3:c.637del, p.(Leu213*) that is predicted to cause a truncated protein, and also a homozygous CNV Chr19(GRCh37):g.53057128_53100968del (predicted to cause a deletion of exons 4 and 5) in two unrelated affected individuals. These patients had pancreatic agenesis, defined as insulin-dependent diabetes in the first 6 months of life (neonatal diabetes) and exocrine pancreatic insufficiency. Both were from consanguineous families. Parents were subsequently tested and shown to be heterozygous carriers. They then investigated 232 additional patients who had been diagnosed with neonatal diabetes before the age of 6 months and found ten more homozygous ZNF808 variants. Six were nonsense: p.(Gln194*), p.(Cys233*), p.(Tyr427*), p.(Lys458*), p.(Tyr528*) and p.(Arg727*), and three were frameshift variants: p.(Ala379Valfs*157), p.(Leu588Profs*118), p.(Asn770Ilefs*98) and one was a whole-gene deletion. All the frameshift and nonsense variants occurred in the last exon of the gene, which contains all 23 zinc finger domains; and therefore all of these variants are predicted to result in truncated proteins, and removal of some, if not all, those domains. This group also carried out functional studies using an in vitro model of pancreas development and showed an aberrant activation of many transposable elements (mostly MER11 elements) that would be normally be repressed during early pancreas development. Sources: Literature |
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| Mendeliome v1.956 | MIR204 |
Chern Lim gene: MIR204 was added gene: MIR204 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MIR204 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MIR204 were set to 26056285; 37321975 Phenotypes for gene: MIR204 were set to Retinal dystrophy and iris coloboma with or without cataract (MIM#616722) Mode of pathogenicity for gene: MIR204 was set to Other Review for gene: MIR204 was set to GREEN gene: MIR204 was marked as current diagnostic Added comment: PMID: 26056285 - Bilateral coloboma and rod-cone dystrophy with or without cataract in nine individuals of a five-generation family. - Heterozygous n.37C>T segregates with the disease in all affected individuals. - Functional analysis including transcriptome analysis showed this variant resulted in significant alterations of miR-204 targeting capabilities. In vivo injection, in medaka fish (Oryzias latipes), of the mutated miR-204 caused a phenotype consistent with that observed in the family. - Authors suggested gain of function is the likely disease mechanism. PMID: 37321975 - Four members of a three-generation family with early-onset chorioretinal dystrophy, heterozygous for n.37C>T. - Additionally, four family members were shown to be affected by albinism resulting from biallelic pathogenic OCA2 variants. - Haplotype analysis excluded relatedness with the family reported in PMID: 26056285. - In silico analysis of the MIR204 n.37C>T variant reveals profound changes to its target mRNAs and suggests a gain-of-function mechanism of miR 204 variant. Sources: Literature |
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| Mendeliome v1.908 | PRSS8 |
Lucy Spencer gene: PRSS8 was added gene: PRSS8 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRSS8 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PRSS8 were set to 36715754 Phenotypes for gene: PRSS8 were set to ichthyosis MONDO:0019269, PRSS8-related Review for gene: PRSS8 was set to AMBER Added comment: PMID: 36715754 1 family with 3 affected sons with congenital ichthyosis, consanguineous parents. All 3 affected members are homozygous for a canonical splice in PRSS8, quantitative RT-PCR showed a significant reduction in normal PRSS8 transcript. A second family with 4 affected members (proband and 3 cousins) with ichthyosis (3 also had autism), also consanguineous. Only the proband was tested who is homozygous for a missense in PTSS8. However this patient also had a TAAR1 missense (no disease association, but the paper suggests this could be responsible for the autism phenotype- KO mice have abnormal learning behaviour). Sources: Literature |
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| Mendeliome v1.898 | POU3F2 |
Sarah Pantaleo gene: POU3F2 was added gene: POU3F2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: POU3F2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: POU3F2 were set to PMID: 37207645 Phenotypes for gene: POU3F2 were set to Autism spectrum disorder, NDD, and adolescent-onset obesity Penetrance for gene: POU3F2 were set to unknown Mode of pathogenicity for gene: POU3F2 was set to Other Review for gene: POU3F2 was set to GREEN Added comment: We associate ultra-rare variants in POU3F2, encoding a central nervous system transcription factor, with syndromic obesity and neurodevelopment delay in 12 individuals. Demonstrate variant pathogenicity through in vitro analysis. Used exome sequencing, GeneMatcher and Genomics England 100,000 Genomes Project rare disease database. Both truncating and missense variants in over 10 individuals sharing autism spectrum disorder, NDD, and adolescent-onset obesity (may have had other features eg. CAKUT in 2 individuals, diabetes in two) . Affected individuals presented with low-to-normal birth weight and infantile feeding difficulties but developed insulin resistance and hyperplasia during childhood. With the exception of an early truncating variant, the variants showed adequate nuclear translocation but overall disturbed DNA-binding ability and promoter activation. Variants absent from population and clinical databases. Almost all constituted putatively non-inherited de novo variants (8/10). Functional studies provide evidence for loss of function in eight and gain of function in one obesity-associated POU3F2 variant. One variant did not impact POU3F2-promoter activation, leaving the possibility for further path-mechanisms. Sources: Literature |
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| Mendeliome v1.779 | CRIPT | Zornitza Stark Phenotypes for gene: CRIPT were changed from Short stature with microcephaly and distinctive facies (MIM#615789) to Short stature with microcephaly and distinctive facies (MIM#615789); Rothmund-Thomson syndrome MONDO:0010002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.778 | CRIPT | Zornitza Stark Classified gene: CRIPT as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.778 | CRIPT | Zornitza Stark Gene: cript has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.776 | CRIPT |
Karina Sandoval changed review comment from: PMID: 37013901 identified 6 individuals with Rothmund-Thomson syndrome, two new identified and 4 were already published. 5 were hom, 1 was chet, all with different variants. Additionally all presented with neuro dev delay and seizures. CRIPT-deficient fibroblasts showed an unremarkable mitotic progression and unremarkable number of mitotic errors, c.132del p.(Ala45Glyfs*82), hom c.227G>A, p.(Cys76Tyr), hom c.133_134insGG,p.(Ala45Glyfs*82),hom c.141del p.(Phe47Leufs*84), hom c.8G>A p.(Cys3Tyr), 1,331 bp del exon 1, chet c.7_8del; p.(Cys3Argfs*4), hom; to: PMID: 37013901 identified 6 individuals with Rothmund-Thomson syndrome characterised by poikiloderma, sparse hair, small stature, skeletal defects, cancer, cataracts, resembling features of premature aging. Two new variants identified and 4 were already published. 5 were hom, 1 was chet, all with different variants. All CRIPT individuals fulfilled the diagnostic criteria for RTS, and additionally had neurodevelopmental delay and seizures. CRIPT-deficient fibroblasts showed an unremarkable mitotic progression and unremarkable number of mitotic errors, c.132del p.(Ala45Glyfs*82), hom c.227G>A, p.(Cys76Tyr), hom c.133_134insGG,p.(Ala45Glyfs*82),hom c.141del p.(Phe47Leufs*84), hom c.8G>A p.(Cys3Tyr), 1,331 bp del exon 1, chet c.7_8del; p.(Cys3Argfs*4), hom |
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| Mendeliome v1.776 | CEP162 |
Paul De Fazio gene: CEP162 was added gene: CEP162 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CEP162 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CEP162 were set to 36862503 Phenotypes for gene: CEP162 were set to Retinitis pigmentosa MONDO:0019200, CEP162-related Penetrance for gene: CEP162 were set to unknown Review for gene: CEP162 was set to AMBER gene: CEP162 was marked as current diagnostic Added comment: 2 patients from reportedly unrelated consanguineous Moroccan families with the same homozygous frameshift variant reported with late-onset retinal degeneration. Patient 1 was diagnosed with RP at age 60, patient 2 at age 69. Both reported loss of visual acuity in the years prior. Immunoblotting of cell lysates from patient fibroblasts showed that some mutant transcript escaped NMD. Functional testing showed that the truncated protein could bind microtubules but was unable to associate with centrioles or its interaction partner CEP290. Patient fibroblasts were shown to have delayed ciliation. Mutant protein was unable to rescue loss of cilia in CEP162 knockdown mice supporting that the mutant protein does not retain any ciliary function, however additional data supported that the truncated protein was able to bind microtubules and function normally during neuroretinal development. The authors suggest this likely underlies the late-onset RP in both patients. Rated Amber because only a single variant has been reported in patients who may or may not be related (same ethnic background). Sources: Literature |
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| Mendeliome v1.776 | CRIPT | Karina Sandoval reviewed gene: CRIPT: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 37013901; Phenotypes: Short stature with microcephaly and distinctive facies (MIM#615789), Rothmund-Thomson syndrome MONDO:0010002; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.752 | PRDM10 |
Achchuthan Shanmugasundram gene: PRDM10 was added gene: PRDM10 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRDM10 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PRDM10 were set to 36440963 Phenotypes for gene: PRDM10 were set to Fibrofolliculoma, HP:0030436; lipomatosis, MONDO:0006574; renal cell carcinoma, MONDO:0005086 Review for gene: PRDM10 was set to RED Added comment: PMID:36440963 reported a family presenting with skin and mucosal lesions, extensive lipomatosis and renal cell carcinomas. The proband was initially diagnosed with Birt-Hogg-Dubé syndrome (BHD, MIM #135150) based on the presence of fibrofolliculomas, but no pathogenic germline variant was detected in FLCN, the gene associated with BHD. A heterozygous missense variant (p.Cys677Tyr) was identified, which co-segregated with the phenotype in the family. Functional studies show that Cys677Tyr loses affinity for a regulatory binding motif in the FLCN promoter, abrogating cellular FLCN mRNA and protein levels. Overexpressing inducible PRDM10Cys677Tyr in renal epithelial cells altered the transcription of multiple genes, showing overlap but also differences with the effects of knocking out FLCN. This gene has not yet been associated with phenotypes either in OMIM or in Gene2Phenotype. Sources: Literature |
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| Mendeliome v1.711 | EPHA10 |
Achchuthan Shanmugasundram changed review comment from: Comment on rating: This gene should be rated RED as this gene has been associated with post-lingual autosomal dominant non-syndromic hearing loss from a single family, and supported by functional studies. PMID:36048850 reported the identification of a heterozygous non-coding variant c.-81_-73delinsAGC cosegregating with hearing loss. Although variants have been identified in KIF17 and USP48 in several members of this family, they did not cosegregate with hearing loss. One affected member of this family had an ideal hearing restoration after cochlear implantation. Epha10 was expressed in mouse cochlea at both transcription and translation levels. In addition, EPHA10 mRNA was detected upregulated in patients compared with controls by qRT-PCR. Overexpression of Eph (the homolog of human EPHA10) altered the structure and function of chordotonal organ (equivalent to mammalian auditory organs) in fly model. These functional evidence suggests that 'gain of function' may be responsible for the hearing loss phenotype. This gene has not yet been associated with any phenotypes in OMIM or Gene2Phenotype. Sources: Literature; to: Comment on rating: This gene should be rated RED as this gene has been associated with post-lingual autosomal dominant non-syndromic hearing loss from a single family, and supported by functional studies. PMID:36048850 reported the identification of a heterozygous non-coding variant c.-81_-73delinsAGC cosegregating with hearing loss. Although variants have been identified in KIF17 and USP48 in several members of this family, they did not cosegregate with hearing loss. One affected member of this family had an ideal hearing restoration after cochlear implantation. Epha10 was expressed in mouse cochlea at both transcription and translation levels. In addition, EPHA10 mRNA was detected upregulated in patients compared with controls by qRT-PCR. Overexpression of Eph (the homolog of human EPHA10) altered the structure and function of chordotonal organ (equivalent to mammalian auditory organs) in fly model. Particularly, Eph overexpressed flies had a poorer performance compared to controls in negative geotaxis assay. These functional evidence suggests that 'gain of function' may be responsible for the hearing loss phenotype. This gene has not yet been associated with any phenotypes in OMIM or Gene2Phenotype. Sources: Literature |
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| Mendeliome v1.711 | EPHA10 |
Achchuthan Shanmugasundram changed review comment from: Comment on rating: This gene should be rated RED as this gene has been associated with post-lingual autosomal dominant non-syndromic hearing loss from a single family, and supported by functional studies. PMID:36048850 reported the identification of a heterozygous non-coding variant c.-81_-73delinsAGC cosegregating with hearing loss. Although variants have been identified in KIF17 and USP48 in several members of this family, they did not cosegregate with hearing loss. One affected member of this family had an ideal hearing restoration after cochlear implantation. Epha10 was expressed in mouse cochlea at both transcription and translation levels. In addition, EPHA10 mRNA was detected upregulated in patients compared with controls by qRT-PCR. Overexpression of Eph (the homolog of human EPHA10) altered the structure and function of chordotonal organ (equivalent to mammalian auditory organs) in fly model. These functional evidence suggests that 'gain of function' may be responsible for the hearing loss phenotype. This gene has not yet been associated with any phenotypes in OMIM or Gene2Phenotype. Sources: Literature; to: Comment on rating: This gene should be rated RED as this gene has been associated with post-lingual autosomal dominant non-syndromic hearing loss from a single family, and supported by functional studies. PMID:36048850 reported the identification of a heterozygous non-coding variant c.-81_-73delinsAGC cosegregating with hearing loss. Although variants have been identified in KIF17 and USP48 in several members of this family, they did not cosegregate with hearing loss. One affected member of this family had an ideal hearing restoration after cochlear implantation. Epha10 was expressed in mouse cochlea at both transcription and translation levels. In addition, EPHA10 mRNA was detected upregulated in patients compared with controls by qRT-PCR. Overexpression of Eph (the homolog of human EPHA10) altered the structure and function of chordotonal organ (equivalent to mammalian auditory organs) in fly model. These functional evidence suggests that 'gain of function' may be responsible for the hearing loss phenotype. This gene has not yet been associated with any phenotypes in OMIM or Gene2Phenotype. Sources: Literature |
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| Mendeliome v1.711 | EPHA10 |
Achchuthan Shanmugasundram gene: EPHA10 was added gene: EPHA10 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: EPHA10 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: EPHA10 were set to 36048850 Phenotypes for gene: EPHA10 were set to postlingual non-syndromic genetic hearing loss, MONDO:0016298 Mode of pathogenicity for gene: EPHA10 was set to Loss-of-function variants (as defined in pop up message) DO NOT cause this phenotype - please provide details in the comments Review for gene: EPHA10 was set to RED Added comment: Comment on rating: This gene should be rated RED as this gene has been associated with post-lingual autosomal dominant non-syndromic hearing loss from a single family, and supported by functional studies. PMID:36048850 reported the identification of a heterozygous non-coding variant c.-81_-73delinsAGC cosegregating with hearing loss. Although variants have been identified in KIF17 and USP48 in several members of this family, they did not cosegregate with hearing loss. One affected member of this family had an ideal hearing restoration after cochlear implantation. Epha10 was expressed in mouse cochlea at both transcription and translation levels. In addition, EPHA10 mRNA was detected upregulated in patients compared with controls by qRT-PCR. Overexpression of Eph (the homolog of human EPHA10) altered the structure and function of chordotonal organ (equivalent to mammalian auditory organs) in fly model. These functional evidence suggests that 'gain of function' may be responsible for the hearing loss phenotype. This gene has not yet been associated with any phenotypes in OMIM or Gene2Phenotype. Sources: Literature |
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| Mendeliome v1.695 | TEFM |
Ee Ming Wong gene: TEFM was added gene: TEFM was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TEFM was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TEFM were set to 36823193 Phenotypes for gene: TEFM were set to Mitochondrial disease (MONDO#0044970), TEFM-related Review for gene: TEFM was set to GREEN gene: TEFM was marked as current diagnostic Added comment: - Seven TEFM variants (4 missense, 2 fs, 1 in-frame del) in seven individuals across five unrelated families - Muscle and primary fibroblast from the affected individuals have reduced levels of promoter distal mitochondrial RNA transcripts - TEFM knockdown in zebrafish embryos resulted in neuromuscular junction abnormalities and abnormal mitochondrial function Sources: Literature |
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| Mendeliome v1.684 | CRIPT | Suliman Khan reviewed gene: CRIPT: Rating: GREEN; Mode of pathogenicity: None; Publications: PMID: 36630262; Phenotypes: Short stature with microcephaly and distinctive facies; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v1.635 | MIR145 |
Lucy Spencer gene: MIR145 was added gene: MIR145 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MIR145 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: MIR145 were set to 36649075 Phenotypes for gene: MIR145 were set to multisystemic smooth muscle dysfunction syndrome (MONDO:0013452), MIR145-related Review for gene: MIR145 was set to RED Added comment: PMID: 36649075- a patient whose fetal ultrasound revealed polyhydramnios, enlarged abdomenand bladder, and prune belly syndrome. During infancy/childhood profound gastrointestinal dysmotility, cerebrovascular disease, and multiple strokes. Described as a multisystemic smooth muscle dysfunction syndrome. Patient was found to have a de novo SNP in MIR145 NR_029686.1:n.18C>A. The MIR145transcript is processed into two microRNAs, with the variant position at nucleotide 3 of miR-145-5p. Transfection of an siRNA against mutant miR145-5p induced a notable decrease in the expression of several cytoskeletal proteins including transgelin, calponin, and importantly, smooth muscle actin. Hybridization analysis and miR RNA-seq demonstrated a decrease in expression of miR145-5p in the presence of mutant miR145-5p. RNA-seq showed that the differentially expressed genes were substantially different between patient and control fibroblasts. Sources: Literature |
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| Mendeliome v1.587 | PHLDB1 |
Seb Lunke gene: PHLDB1 was added gene: PHLDB1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PHLDB1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PHLDB1 were set to 36543534 Phenotypes for gene: PHLDB1 were set to osteogenesis imperfecta, MONDO:0019019 Review for gene: PHLDB1 was set to AMBER Added comment: 5 children from two consanguineous families with recurrent fractures and/or osteopaenia, platyspondyly, short and bowed long bones, and widened metaphyses. Metaphyseal and vertebral changes regressed after early childhood, and no fractures occurred under bisphosphonate treatment. Two independent nonsense variants were identified in the families, NM_001144758.3:c.2392dup (p.Leu798Profs*4) and NM_001144758.3:c.2690_2693del (p.Leu897Glnfs*24). RT-PCR and western blot analysis confirmed loss of transcript and protein product, respectively, but no further functional data provided. Sources: Literature |
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| Mendeliome v1.576 | TRA2B |
Elena Savva gene: TRA2B was added gene: TRA2B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TRA2B was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: TRA2B were set to PMID: 36549593 Phenotypes for gene: TRA2B were set to Neurodevelopmental disorder, TRA2B-related (MONDO#0700092) Review for gene: TRA2B was set to GREEN Added comment: PMID: 36549593 - 12 individuals with ID and dev delay. Additional features include infantile spams 6/12, hypotonia 12/12, dilated brain ventricles 6/12, microcephaly 5/12 - All variants result in the loss of 1/2 transcripts (start-losses or PTCs upstream of a second translation start position). Shorter transcript expression is increased, longer transcript expression is decreased. - Apparently het mice K/O are normal, but complete K/O cannot develop embryonically. - DN mechanism suggested Sources: Literature |
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| Mendeliome v1.491 | KIF26A |
Chirag Patel gene: KIF26A was added gene: KIF26A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: KIF26A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: KIF26A were set to PMID: 36228617 Phenotypes for gene: KIF26A were set to Congenital brain malformations, no OMIM # Review for gene: KIF26A was set to GREEN Added comment: 5 unrelated patients with biallelic loss-of-function variants in KIF26A (found through WES), exhibiting a spectrum of congenital brain malformations (schizencephaly, corpus callosum anomalies, polymicrgyria, and ventriculomegaly). Combining mice and human iPSC-derived organoid models, they discovered that loss of KIF26A causes excitatory neuron-specific defects in radial migration, localization, dendritic and axonal growth, and apoptosis, offering a convincing explanation of the disease etiology in patients. Single-cell RNA sequencing in KIF26A knockout organoids revealed transcriptional changes in MAPK, MYC, and E2F pathways. Sources: Literature |
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| Mendeliome v1.302 | COX11 |
Zornitza Stark gene: COX11 was added gene: COX11 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: COX11 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: COX11 were set to 36030551 Phenotypes for gene: COX11 were set to Mitochondrial disease (MONDO:0044970), COX11-related Review for gene: COX11 was set to GREEN Added comment: PMID: 36030551 - Biallelic variants in COX11 associated with infantile-onset mitochondrial encephalopathies in two unrelated consanguineous families, one with homozygous missense variant, another with homozygous frameshift variant. - Functional studies supported pathogenicity of the missense variant, and showed that mutant COX11 fibroblasts had decreased ATP levels which could be rescued by CoQ10. - RNA studies suggested the mutant transcript with p.(Val12Glyfs*21) is not degraded by nonsense mediated decay. Sources: Literature |
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| Mendeliome v1.285 | TYMS |
Lucy Spencer gene: TYMS was added gene: TYMS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: TYMS was set to Other Publications for gene: TYMS were set to 35931051 Phenotypes for gene: TYMS were set to Dyskeratosis congenita MONDO:0015780 Review for gene: TYMS was set to RED Added comment: 8 families with dyskeratosis congenita and heterozygous variants in TYMS. 4 PTCs, 2 missense and 1 splice (2 families had the same frameshift). However in all families 1 unaffected parent was also heterozygous for the same TYSM variant. The other parent in 3 of these families was then shown to carry a heterozygous variant in ENOSF1 which each affected child was also heterozygous for. ENOSF1 has been shown to modify TYMS expression at the RNA level by acting as an antisense molecule to TYMS. ENOSF1 partially overlaps TYMS on chromosome 18 and is transcribed in the opposite direction to TYMS. This paper is suggesting digenic inheritance. The TYMS wild type parent from another family was seen to have a TYMSOS variant which was also observed along with the TYMS variant in their 2 affected children. Immunoblotting showed a stark reduction in TYMS protein level in the cells of affected probands when compared to the parent carrier, wild-type parent, and the controls. Lymphoblastoid cells from affected probands have severe TYMS deficiency, altered cellular deoxyribonucleotide triphosphate pools, and hypersensitivity to the TYMS-specific inhibitor 5-fluorouracil. These defects in the nucleotide metabolism pathway resulted in genotoxic stress, defective transcription, and abnormal telomere maintenance. Gene-rescue studies in cells from affected probands revealed that post-transcriptional epistatic silencing of TYMS is occurring via elevated ENOSF1. Sources: Literature |
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| Mendeliome v1.259 | NPNT |
Chirag Patel gene: NPNT was added gene: NPNT was added to Mendeliome. Sources: Literature Mode of inheritance for gene: NPNT was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: NPNT were set to PMID: 35246978, 34049960, 17537792 Phenotypes for gene: NPNT were set to Renal agenesis, no OMIM # Review for gene: NPNT was set to GREEN Added comment: 3 consanguineous families with multiple affecteds with bilateral renal agenesis. Whole-exome sequencing (WES)-based homozygosity mapping identified 2 homozygous truncating variants. Reverse transcription polymerase chain reaction data showing complete nonsense-mediated decay of the NPNT transcript. Loss of nephronectin (NPNT) is known to lead to failure of metanephric kidney development with resulting renal agenesis in murine models. Sources: Literature |
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| Mendeliome v1.247 | ZMYND8 |
Zornitza Stark gene: ZMYND8 was added gene: ZMYND8 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: ZMYND8 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: ZMYND8 were set to 35916866; 32530565 Phenotypes for gene: ZMYND8 were set to Neurodevelopmental disorder, MONDO:0700092, ZMYND8-related; Delayed speech and language development; Motor delay; Intellectual disability; Abnormality of cardiovascular system morphology; Hearing abnormality; Abnormality of vision; Abnormality of the face; Seizures Review for gene: ZMYND8 was set to GREEN Added comment: Dias et al (2022 - PMID: 35916866) describe the phenotype of 11 unrelated individuals with monoallelic de novo (or suspected de novo) missense (N=9) or truncating (N=2) ZMYND8 variants. One of these subjects was previously reported by Suzuki et al (2020 - PMID: 32530565). Features included speech delay/language difficulties (9/11), motor delay (9/11), ID (in 10/11 - profound in 1, moderate in 2), CHD (7/11 - PDA, VSD, ASD, pulmonary stenosis, etc), hearing or vision impairment (7/11). Seizures were reported in few (in text 5/11, table 2/11). Variable non-familial facial features were present in (9/11). As the authors discuss, ZMYND8 encodes a multidomain protein playing a role in transcription regulation, chromatin remodeling, regulation of super enhancers, DNA damage response/tumor suppression. The protein is broadly expressed in brain and shows highest expression in early development. Molecular modeling and/or a yeast two-hybrid system were suggestive of disrupted interaction of ZMYND8 with Drebrin (missense variants in PWWP domain) or GATAD2A (variants in MYND domain). Neuronal Zmynd8 knockdown in Drosophila resulted in deficits in habituation learning. Sources: Expert Review |
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| Mendeliome v1.173 | PMM2 |
Zornitza Stark edited their review of gene: PMM2: Added comment: Association with HIPKD: Cabezas et al (2017) reported co-occurrence of hyperinsulinaemic hypoglycaemia and polycystic kidney disease (HIPKD in 17 children from 11 unrelated families. Patients presented with hyperinsulinaemic hypoglycaemia in infancy and enlarged kidneys with multiple kidney cysts. Some progressed to ESKD and some had liver cysts. Whole-genome linkage analysis in 5 informative families identified a single significant locus on chromosome 16p13.2. Sequencing of the coding regions of all linked genes failed to identify biallelic mutations. Instead, they found in all patients a promoter mutation (c.-167G>T) in PMM2, either homozygous or in trans with PMM2 coding mutations. They found deglycosylation in cultured pancreatic β cells altered insulin secretion. In vitro, the PMM2 promoter mutation associated with decreased transcriptional activity in patient kidney cells and impaired binding of the transcription factor ZNF143. In silico analysis suggested an important role of ZNF143 for the formation of a chromatin loop including PMM2. They proposed that the PMM2 promoter mutation alters tissue-specific chromatin loop formation, with consequent organ-specific deficiency of PMM2 leading to the restricted phenotype of HIPKD. None of the patients exhibited the typical clinical or diagnostic features of CDG1A. Serum transferrin glycosylation was normal in 11 patients who had assessment.; Changed publications: 28108845, 28373276, 32595772; Changed phenotypes: Congenital disorder of glycosylation, type Ia (MIM#212065), Hyperinsulinaemic Hypoglycaemia and Polycystic Kidney Disease (HIPKD), MONDO:0020642, PMM2-related |
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| Mendeliome v1.44 | ATOH1 |
Chloe Stutterd gene: ATOH1 was added gene: ATOH1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: ATOH1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ATOH1 were set to 35518571 Phenotypes for gene: ATOH1 were set to Pontocerebellar hypoplasia; developmental delay; hearing loss Penetrance for gene: ATOH1 were set to unknown Review for gene: ATOH1 was set to AMBER Added comment: Single report of novel homozygous missense variant in functional domain segregating with disease in two affected siblings with pontocerebellar hypoplasia, developmental delay and hearing loss. Similar phenotype previously reported in animal model with biallelic missense variant affecting same functional domain. Homology modelling predicts this missense variant affects binding capability of the bHLH domain to the DNA. Gene encodes a core transcription factor in developing cerebellum, brainstem, dorsal spinal cord and ear. Sources: Literature |
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| Mendeliome v1.35 | GIMAP6 |
Elena Savva gene: GIMAP6 was added gene: GIMAP6 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: GIMAP6 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: GIMAP6 were set to PMID: 35551368; 33328581 Phenotypes for gene: GIMAP6 were set to Autophagy, immune competence and inflammation Review for gene: GIMAP6 was set to AMBER Added comment: PMID: 35551368, PMID: 33328581 - K/O mice show autophagy, redox regulation, and polyunsaturated fatty acid (PUFA)–containing lipids and die prematurely from microangiopathic glomerulosclerosis with immunodeficiency. - 2 unrelated families (3 patients) w/ a homozygous missense (p.Gly153Val) and nonsense (p.Trp86*). All unaffected siblings were heterozygous. Patient 1 (missense) presented with Coombs-positive hemolytic anemia, hepatosplenomegaly, Cranial MRI showed bilateral effusions, sulcal hyperintensity, and lateral parietal subcortical acute focal ischemic lesions. Patient 2 (nonsense) presented with recurrent purulent otitis media and a chronic wet cough, persistent jaundice, recurrent chest and ear infections, lingular consolidation, mild bronchiectasis, bibasilar bronchial wall thickening, right peribronchial consolidation, right lower lobe bronchiectasis, bilateral axillary lymphadenopathy, and splenomegaly. Patient 3 (nonsense) presented with suffered headaches, abdomen pain, mouth ulcers, and recurrent infections - Functional studies show patient 1 (missense) with reduced protein expression on western blot, and patient 2/3 (nonsense) with no protein expression. T cells of Pt 1 were similar to mouse K/O model (elevated basal LC3-II, reduced autophagic flux). gnomAD: 0 homozygous PTCs, but a very common canonical splice which is present in the non-canonical transcript Sources: Literature |
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| Mendeliome 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 |
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| Mendeliome v0.12711 | VPS16 |
Ain Roesley changed review comment from: for AR MPS: 3 unrelated families - 2x hom c.2272‐18C>A and 1x hom p.Trp180Cys RNA and functional studies done on the splice variant for AD see review below; to: for AR MPS: 3 unrelated families - 2x hom c.2272‐18C>A and 1x hom p.Trp180Cys RNA and functional studies done on the splice variant for AD see review below PMID:34901436 suggests dystonia is transcript specific |
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| Mendeliome v0.12430 | EPO |
Bryony Thompson changed review comment from: PMID: 27651169, 29514032, 25985138 - At least 4 families reported with heterozygous variants segregating with erythrocytosis. Mechanism of disease is gain-of-function. Frameshift variants identified (c.32delG, c.19delC) use of an alternative promoter (P2) in intron 1 causing the production of functional transcripts and increased amounts of biologically active EPO compared to controls, and 5’UTR conserved variant (c.‐136G>A) and expected to have a similar mechanism. PMID: 28283061 - single proband from a consanguineous family with severe anaemia (Diamond-Blackfan anaemia phenotype) reported with a homozygous missense (R150Q) showing a mild reduction in its affinity for the EPO receptor; to: PMID: 27651169, 29514032, 25985138 - At least 4 families reported with heterozygous variants segregating with erythrocytosis. Mechanism of disease is gain-of-function. Frameshift variants identified (c.32delG, c.19delC) use of an alternative promoter (P2) in intron 1 causing the production of functional transcripts and increased amounts of biologically active EPO compared to controls, and 5’UTR conserved variant (c.‐136G>A) expected to have a similar mechanism. PMID: 28283061 - single proband from a consanguineous family with severe anaemia (Diamond-Blackfan anaemia phenotype) reported with a homozygous missense (R150Q) showing a mild reduction in its affinity for the EPO receptor |
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| Mendeliome v0.10993 | KIAA0391 | Zornitza Stark changed review comment from: Comment when marking as ready: Note gene is referred to as PRORP in the manuscript, but HGNC approved name is KIAA0391.; to: HGNC approved name is now PRORP. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10938 | THUMPD1 |
Chern Lim changed review comment from: Broly, M. et al. (2022) manuscript accepted in AJHG: - 13 individuals from 8 families, loss of function variants (PTVs, one missense, one single AA del). - Common phenotypic findings included global developmental delay, speech delay, moderate to severe intellectual deficiency, behavioral abnormalities such as angry outbursts, facial dysmorphism and ophthalmological abnormalities. Sources: Other; to: Broly, M. et al. (2022): - 13 individuals from 8 families, loss of function variants (PTVs, one missense, one single AA del). - Common phenotypic findings included global developmental delay, speech delay, moderate to severe intellectual deficiency, behavioral abnormalities such as angry outbursts, facial dysmorphism and ophthalmological abnormalities. Sources: Other |
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| Mendeliome v0.10938 | THUMPD1 |
Chern Lim gene: THUMPD1 was added gene: THUMPD1 was added to Mendeliome. Sources: Other Mode of inheritance for gene: THUMPD1 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: THUMPD1 were set to Syndromic form of intellectual disability associated with developmental delay, behavioral abnormalities, hearing loss and facial dysmorphism, AR Review for gene: THUMPD1 was set to GREEN gene: THUMPD1 was marked as current diagnostic Added comment: Broly, M. et al. (2022) manuscript accepted in AJHG: - 13 individuals from 8 families, loss of function variants (PTVs, one missense, one single AA del). - Common phenotypic findings included global developmental delay, speech delay, moderate to severe intellectual deficiency, behavioral abnormalities such as angry outbursts, facial dysmorphism and ophthalmological abnormalities. Sources: Other |
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| Mendeliome v0.10793 | CHP1 |
Zornitza Stark gene: CHP1 was added gene: CHP1 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: CHP1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CHP1 were set to 29379881; 32787936 Phenotypes for gene: CHP1 were set to Spastic ataxia 9, autosomal recessive, MIM #618438 Review for gene: CHP1 was set to GREEN Added comment: 2 different consanguineous families with 2 affected siblings with ataxia (1 paediatric onset, 1 adult onset). 3 of the patients had cerebellar atrophy. WES identified homozygous variants in CHP1 gene in both families (K19del and Arg91Cys), which segregated with the disorder in the family. Decreased CHP1 protein on IHC of cerebellar tissue in family with Arg91Cys variant. In vitro functional expression studies in HEK293 cells showed that the K19del mutation resulted in decreased protein expression, with normal levels of transcript, suggesting defects in protein stability. The mutant protein formed massive protein aggregates in transfected neuronal cell bodies and neurite-like projections, whereas the wildtype protein showed a more uniform distribution. The mutant protein altered CHP1 association into functional complexes and impaired membrane localization of the Na+/H+ transporter NHE1. The findings indicated that the CHP1 mutation likely causes ataxia in an NHE1-dependent manner, resembling the mechanism observed in the Chp1 vacillator mutant mouse. Sources: Expert Review |
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| Mendeliome v0.10751 | ANGPT2 | Zornitza Stark edited their review of gene: ANGPT2: Added comment: Bi-allelic disease PMID 34876502: single family reported with four fetuses with hydrops fetalis homozygous for ANGPT2 NM_001147.2:c.557A>G. The consanguineous parents and surviving sibblings (a girl and a boy), were heterozygous for this variant. This variant is predicted to create a cryptic exonic splice site, resulting in a r.557_566del and nonsense-mediated mRNA decay. This prediction was supported by the lack of a transcript from this allele in the parents.; Changed publications: 32908006, 34876502; Changed phenotypes: Lymphatic malformation-10, MIM#619369, Primary lymphoedema, Hydrops; Changed mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.10066 | SNIP1 | Zornitza Stark edited their review of gene: SNIP1: Added comment: A single (founder) variant NM_024700.4:c.1097A>G, p.(Glu366Gly) has been reported in over 30 cases of Psychomotor retardation, epilepsy, and craniofacial dysmorphism OMIM:614501 in the Amish community (PMIDs: 22279524; 34570759). Cases are homozygous for this variant and unaffected members of the families are heterozygous or wt. Overexpression of the equivalent mouse variant in mouse inner medullary collecting duct cells, resulted in a more aggregated appearance in the nucleus compared to wildtype. The variant protein maybe unstable as Western blots showed reduced levels of the variant protein (PMID: 22279524). Whole transcriptomic analysis of patient blood was performed in PMID: 34570759. This revealed 11 upregulated and 32 downregulated genes, of which 24 had previously been associated with neurological disease.; Changed rating: AMBER; Changed publications: 22279524, 34570759 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9572 | KIAA0391 | Zornitza Stark Added comment: Comment when marking as ready: Note gene is referred to as PRORP in the manuscript, but HGNC approved name is KIAA0391. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.9392 | OSTC |
Belinda Chong gene: OSTC was added gene: OSTC was added to Mendeliome. Sources: Literature Mode of inheritance for gene: OSTC was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: OSTC were set to PMID: 32267060 Phenotypes for gene: OSTC were set to Oligosaccharyltransferase complex-congenital disorders of glycosylation Review for gene: OSTC was set to RED Added comment: A patient with microcephaly, dysmorphic facies, congenital heart defect, focal epilepsy, infantile spasms, skeletal dysplasia, and a type 1 serum transferrin isoelectrofocusing due to a novel CDG caused by a homozygous variant in the oligosaccharyltransferase complex noncatalytic subunit (OSTC) gene involved in glycosylation and confirmed by serum transferrin electrophoresis. Patient was homozygous for a canonical splice variant (c.431 + 1G > A), mRNA from patient's fibroblast showed mRNA transcript reduced 80-90%/aberrant splicing - predicting NMD. GnomAD - 10 hets, 0 hom Sources: Literature Sources: Literature |
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| Mendeliome v0.8807 | VPS50 |
Zornitza Stark gene: VPS50 was added gene: VPS50 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: VPS50 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: VPS50 were set to 34037727 Phenotypes for gene: VPS50 were set to Neonatal cholestatic liver disease; Failure to thrive; Profound global developmental delay; Postnatal microcephaly; Seizures; Abnormality of the corpus callosum Review for gene: VPS50 was set to AMBER Added comment: Schneeberger et al (2021 - PMID: 34037727) describe the phenotype of 2 unrelated individuals with biallelic VPS50 variants. Common features included transient neonatal cholestasis, failure to thrive, severe DD with failure to achieve milestones (last examination at 2y and 2y2m respectively), postnatal microcephaly, seizures (onset at 6m and 25m) and irritability. There was corpus callosum hypoplasia on brain imaging. Both individuals were homozygous for variants private to each family (no/not known consanguinity applying to each case). The first individual was homozygous for a splicing variant (NM_017667.4:c.1978-1G>T) and had a similarly unaffected sister deceased with no available DNA for testing. The other individual was homozygous for an in-frame deletion (c.1823_1825delCAA / p.(Thr608del)). VPS50 encodes a critical component of the endosome-associated recycling protein (EARP) complex, which functions in recycling endocytic vesicles back to the plasma membrane [OMIM based on Schindler et al]. The complex contains VPS50, VPS51, VPS52, VPS53, the three latter also being components of GARP (Golgi-associated-retrograde protein) complex. GARP contains VPS54 instead of VPS50 and is required for trafficking of proteins to the trans-golgi network. Thus VPS50 (also named syndetin) and VPS54 function in the EARP and GARP complexes, to define directional movement of their endocytic vesicles [OMIM based on Schindler et al]. The VPS50 subunit is required for recycling of the transferrin receptor. As discussed by Schneeberger et al (refs provided in text): - VPS50 has a high expression in mouse and human brain as well as throughout mouse brain development. - Mice deficient for Vps50 have not been reported. vps50 knockdown in zebrafish results in severe developmental defects of the body axis. Knockout mice for other proteins of the EARP/GARP complex (e.g. Vps52, 53 and 54) display embryonic lethality. Studies performed by Schneeberger et al included: - Transcript analysis for the 1st variant demonstrated skipping of ex21 (in patient derived fabriblasts) leading to an in frame deletion of 81 bp (r.1978_2058del) with predicted loss of 27 residues (p.Leu660_Leu686del). - Similar VPS50 mRNA levels but significant reduction of protein levels (~5% and ~8% of controls) were observed in fibroblasts from patients 1 and 2. Additionally, significant reductions in the amounts of VPS52 and VPS53 protein levels were observed despite mRNA levels similar to controls. Overall, this suggested drastic reduction of functional EARP complex levels. - Lysosomes appeared to have similar morphology, cellular distribution and likely unaffected function in patient fibroblasts. - Transferrin receptor recycling was shown to be delayed in patient fibroblasts suggestive of compromise of endocytic-recycling function. As the authors comment, the phenotype of both individuals with biallelic VPS50 variants overlaps with the corresponding phenotype reported in 15 subjects with biallelic VPS53 or VPS51 mutations notably, severe DD/ID, microcephaly and early onset epilepsy, CC anomalies. Overall, for this group, they propose the term "GARP and/or EARP deficiency disorders". There is no VPS50-associated phenotype in OMIM or G2P. SysID includes VPS50 among the ID candidate genes. Sources: Literature |
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| Mendeliome v0.8741 | TCF7L2 |
Zornitza Stark changed review comment from: 2 reviews Konstantinos Varvagiannis (Other) I don't know Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants. Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11). One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury. TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts. Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development. Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1]. The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA). No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism. There are no variant or other studies performed, nor any animal models discussed. In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs). Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm. There is no other associated phenotype (notably NDD) in OMIM. G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF). SysID includes this gene within the autism candidate genes and current primary ID genes.; to: Dias et al (2021 - PMID: 34003604) describe the phenotype of 11 unrelated individuals harboring de novo missense/truncating TCF7L2 variants. Features included DD in childhood (motor delay in 8/11, speech delay in 11/11), intellectual abilities ranging from average cognitive functioning to mild/moderate ID (the latter observed in 5/11), myopia (6/11) , dysmorphic features, variable orthopedic findings, and neuropsychiatric comorbidities incl. ASD (4/11) / ADHD (4/11). One additional (12th) individual was excluded from this summary due to concurrent diagnosis of hypoxic-ischemic injury. TCF7L2 on 10q25 encodes transcription factor 7-like 2, a high mobility group (HMG) box-containing transcription factor. As the authors discuss, the protein mediates canonical Wnt signaling. Secreted Wnt proteins lead to release of beta-catenin (CTNNB1) which after translocation to the nucleus acts with DNA-binding factors incl. TCF7L2 to turn on Wnt-responsive target genes. As a result TCF7L2 acts with beta-catenin as a switch for transcriptional regulation. Multiple alternative spliced TCF7L2 transcripts mediate it's function and specificity of transcriptional repertoire in a variety of tissues and contexts. Dias et al provide references for its role in nervous system development incl. neurogenesis and thalamic development. Variants in all cases occurred as de novo events with pLoF (stopgain, frameshift, splicing) ones predicted to lead to NMD. Missense variants occurred in all cases in or adjacent to the HMG box domain [aa 350-417]. 5 different missense variants affecting 3 residues were reported incl. c.1142A>C, c.1143C>G (leading to Asn381Thr/Lys respectively), c.1250G>T (Trp417Leu), c.1267T>C, c.1268A>G (leading to Tyr423His/Cys) [NM_001146274.1]. The gene has a pLI of 0.99-1 gnomAD/ExAC while there is a region of missense constraint encompassing the HMG box domain (the latter is an evolutionary conserved region mediating interactions with DNA). No phenotypic differences were observed among individuals with pLoF and missense SNVs, and haploinsufficiency is presumed to be the underlying mechanism. There are no variant or other studies performed, nor any animal models discussed. In supplementary table 2, the authors provide several references to previous large scale sequencing studies with brief/incomplete descriptions of individuals de novo TCF7L2 variants and neurodevelopmental disorder (ID/ASD - Iossifov, De Rubeis, Lelieveld, McRae/DDD study and many other Refs). Heterozygous TCF7L2 variants are thought to confer susceptibility to type diabetes mellitus (MIM 125853). Individuals reported by Dias et al did not have endocrine abnormalities including DM. A study by Roychowdhury et al (2021 - PMID: 34265237) suggests that regulatory variants in TCF7L2 are associated with thoracic aneurysm. There is no other associated phenotype (notably NDD) in OMIM. G2P includes TCF7L2 in its DD panel (Disease : TC7L2-related DD, Confidence:confirmed, Monoallelic, LoF). SysID includes this gene within the autism candidate genes and current primary ID genes. |
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| Mendeliome v0.8736 | PIDD1 |
Zornitza Stark gene: PIDD1 was added gene: PIDD1 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: PIDD1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PIDD1 were set to 28397838; 29302074; 33414379; 34163010 Phenotypes for gene: PIDD1 were set to Global developmental delay; Intellectual disability; Seizures; Autism; Behavioral abnormality; Psychosis; Pachygyria; Lissencephaly; Abnormality of the corpus callosum Review for gene: PIDD1 was set to GREEN Added comment: There is enough evidence to include this gene in the current panel with green rating. Biallelic PIDD1 pathogenic variants have been reported in 26 individuals (11 families) with DD (all), variable degrees of ID (mild to severe), behavioral (eg. aggression/self-mutilation in several, ADHD) and/or psychiatric abnormalities (ASD, psychosis in 5 belonging to 3 families), well-controlled epilepsy is some (9 subjects from 6 families) and MRI abnormalities notably abnormal gyration pattern (pachygyria with predominant anterior gradient) as well as corpus callosum anomalies (commonly thinning) in several. Dysmorphic features have been reported in almost all, although there has been no specific feature suggested. The first reports on the phenotype associated with biallelic PIDD1 mutations were made by Harripaul et al (2018 - PMID: 28397838) and Hu et al (2019 - PMID: 29302074) [both studies investigating large cohorts of individuals with ID from consanguineous families]. Sheikh et al (2021 - PMID: 33414379) provided details on the phenotype of 15 individuals from 5 families including those from the previous 2 reports and studied provided evidence on the role of PIDD1 and the effect of variants. Zaki et al (2021 - PMID: 34163010) reported 11 additional individuals from 6 consanguineous families, summarize the features of all subjects published in the literature and review the neuroradiological features of the disorder. PIDD1 encodes p53-induced death domain protein 1. The protein is part of the PIDDosome, a multiprotein complex also composed of the bipartite linker protein CRADD (also known as RAIDD) and the proform of caspase-2 and induces apoptosis in response to DNA damage. There are 5 potential PIDD1 mRNA transcript variants with NM_145886.4 corresponding to the longest. Similar to the protein encoded by CRADD, PIDD1 contains a death domain (DD - aa 774-893). Constitutive post-translational processing gives PIDD1-N, PIDD1-C the latter further processed into PIDD1-CC (by auto-cleavage). Serine residues at pos. 446 and 588 are involved in this autoprocessing generating PIDD1-C (aa 446-910) and PIDD1-CC (aa 774-893). The latter is needed for caspase-2 activation. Most (if not all) individuals belonged to consanguineous families of different origins and harbored pLoF or missense variants. Variants reported so far include : c.2587C>T; p.Gln863* / c.1909C>T ; p.Arg637* / c.2443C>T / p.Arg815Trp / c.2275-1G>A which upon trap assay was shown to lead to skipping of ex15 with direct splicing form exon14 to the terminal exon 16 (resulting to p.Arg759Glyfs*1 with exlcusion of the entire DD) / c.2584C>T; p.Arg862Trp / c.1340G>A; p.Trp447* / c.2116_2120del; p.Val706His*, c.1564_1565del; p.Gly602fs*26 Evidence so far provided includes: - Biallelic CRADD variants cause a NDD disorder and a highly similar gyration pattern. - Confirmation of splicing effect (eg. for c.2275-1G>A premature stop in position 760) or poor expression (NM_145886.3:c.2587C>T; p.Gln863*). Arg815Trp did not affect autoprocessing or protein stability. - Abnormal localization pattern, loss of interaction with CRADD and failure to activate caspase-2 (MDM2 cleavage assay) [p.Gln863* and Arg815Trp] - Available expression data from GTEx (PIDD1 having broad expression in multiple tissues, but higher in brain cerebellum) as well as BrainSpan and PsychEncode studies suggesting high coexpression of PIDD1, CRADD and CASP2 in many regions in the developing human brain. - Variants in other genes encoding proteins interacting with PIDD1 (MADD, FADD, DNAJ, etc) are associated with NDD. Pidd-1 ko mice (ex3-15 removal) lack however CNS-related phenotypes. These show decreased anxiety but no motor anomalies. This has also been the case with Cradd-/- mice displaying no significant CNS phenotypes without lamination defects. There is currently no associated phenotype in OMIM. PIDD1 is listed in the DD panel of G2P (PIDD1-related NDD / biallelic / loss of function / probable) . SysID includes PIDD1 among the current primary ID genes. Sources: Expert Review |
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| Mendeliome v0.8485 | STX3 |
Zornitza Stark changed review comment from: At least 5 unrelated families reported.; to: At least 5 unrelated families reported. STX3 isoform B (STX3B) predominates in the retina, so mutations in the STX3 gene that affect both isoform A (STX3A) and STX3B cause both retinal and gastrointestinal disease (RDMVID), whereas mutations in STX3 affecting only the STX3A transcript cause only diarrhoea. |
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| Mendeliome v0.8334 | DYNC2H1 |
Zornitza Stark changed review comment from: More than 50 unrelated families reported.; to: More than 50 unrelated families reported with predominantly skeletal dysplasia. Association with RP: - Five affected probands with homozygous and compound heterozygous missense and PTC variants - Associated with the NM_001080463.1 transcript (predominant isoform in retina from retinal organoid studies). PMID 32753734 |
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| Mendeliome v0.8165 | RNU12 |
Bryony Thompson gene: RNU12 was added gene: RNU12 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RNU12 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: RNU12 were set to 34085356; 27863452 Phenotypes for gene: RNU12 were set to CDAGS syndrome MIM#603116; Craniosynostosis, Delayed closure of the fontanelles, cranial defects, clavicular hypoplasia, Anal and Genitourinary malformations, and Skin manifestations Review for gene: RNU12 was set to GREEN Added comment: 5 CDAGS syndrome families with biallelic variants all including NC_000022.10:g.43011402C>T and another variant on the second allele. Whole transcriptome sequencing analysis of patient lymphoblastoid cells identified differentially expressed genes, and differential alternative splicing analysis indicated there was an enrichment of alternative splicing events. Also, limited evidence for an association with cerebellar ataxia with a single large consanguineous family reported with a homozygous variant. Sources: Literature |
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| Mendeliome v0.8008 | RFX4 |
Zornitza Stark gene: RFX4 was added gene: RFX4 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RFX4 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RFX4 were set to 33658631 Phenotypes for gene: RFX4 were set to ID, ASD, ADHD Review for gene: RFX4 was set to GREEN Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis. Sources: Literature |
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| Mendeliome v0.8006 | RFX3 |
Zornitza Stark gene: RFX3 was added gene: RFX3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RFX3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RFX3 were set to 33658631 Phenotypes for gene: RFX3 were set to ID, ASD, ADHD Review for gene: RFX3 was set to GREEN Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis. Sources: Literature |
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| Mendeliome v0.8004 | RFX7 |
Zornitza Stark gene: RFX7 was added gene: RFX7 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: RFX7 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: RFX7 were set to 33658631 Phenotypes for gene: RFX7 were set to ID, ASD, ADHD Review for gene: RFX7 was set to GREEN Added comment: Report of 38 individuals (from 33 unrelated families) with de novo or inherited loss of function variants in RFX3 (15 families), RFX4 (4 families), and RFX7 (14 families), identified through WES. Individuals share neurobehavioural features including ASD, intellectual disability, and/or ADHD; other frequent features include hypersensitivity to sensory stimuli and sleep problems. RFX3, RFX4, and RFX7 are strongly expressed in developing and adult human brain, and X-box binding motifs as well as RFX ChIP-seq peaks are enriched in the cis-regulatory regions of known ASD risk genes. These genes are potentially critical transcriptional regulators of neurobiological pathways associated with neurodevelopmental disease pathogenesis. Sources: Literature |
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| Mendeliome v0.7749 | MCM7 |
Arina Puzriakova gene: MCM7 was added gene: MCM7 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: MCM7 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MCM7 were set to 33654309; 34059554 Phenotypes for gene: MCM7 were set to Meier-Gorlin syndrome; Microcephaly; Intellectual disability; Lipodystrophy; Adrenal insufficiency Review for gene: MCM7 was set to AMBER Added comment: MCM7 is a component of the MCM complex, a DNA helicase which is essential for DNA replication. Other components have been linked to disease with phenotypes including microcephaly and ID. MCM7 is not associated with any phenotype in OMIM or G2P at present. ------ Currently there are 3 unrelated pedigrees in literature with different biallelic MCM7 variants associated with disease (see below). Although there is some functional data in support of variant-level deleteriousness or gene-level pathogenicity, the clinical gestalt is very different between the 3 families. - PMID: 33654309 (2021) - Two unrelated individuals with different compound het variants in MCM7 but disparate clinical features. One patient had typical Meier-Gorlin syndrome (including growth retardation, microcephaly, congenital lung emphysema, absent breast development, microtia, facial dysmorphism) whereas the second case had a multi-system disorder with neonatal progeroid appearance, lipodystrophy and adrenal insufficiency. While small at birth, the second patient did not demonstrate reduced stature or microcephaly at age 14.5 years. Both individuals had normal neurodevelopment. Functional studies using patient-derived fibroblasts demonstrate that the identified MCM7 variants were deleterious at either transcript or protein levels and through interfering with MCM complex formation, impact efficiency of S phase progression. - PMID: 34059554 (2021) - Homozygous missense variant identified in three affected individuals from a consanguineous family with severe primary microcephaly, severe ID and behavioural abnormalities. Knockdown of Mcm7 in mouse neuroblastoma cells lead to reduced cell viability and proliferation with increased apoptosis, which were rescued by overexpression of wild-type but not mutant MCM7. Sources: Literature |
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| Mendeliome v0.7186 | EXOSC1 |
Zornitza Stark gene: EXOSC1 was added gene: EXOSC1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: EXOSC1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: EXOSC1 were set to 33463720 Phenotypes for gene: EXOSC1 were set to Pontocerebellar hypoplasia Review for gene: EXOSC1 was set to RED Added comment: An 8‐months‐old male with developmental delay, microcephaly, subtle dysmorphism, hypotonia, pontocerebellar hypoplasia and delayed myelination. Similarly affected elder sibling succumbed at the age of 4‐years 6‐months. Exome sequencing revealed a homozygous missense variant (c.104C >T, p.Ser35Leu) in EXOSC1. In silico mutagenesis revealed loss of a polar contact with neighbouring Leu37 residue. Quantitative real‐time PCR indicated no appreciable differences in EXOSC1 transcript levels. Immunoblotting and blue native PAGE revealed reduction in the EXOSC1 protein levels and EXO9 complex in the proband, respectively. Of note, bi‐allelic variants in other exosome subunits EXOSC3, EXOSC8 and EXOSC9 have been reported to cause pontocerebellar hypoplasia type 1B, type 1C and type 1D, respectively. Sources: Literature |
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| Mendeliome v0.7127 | VWA1 |
Melanie Marty gene: VWA1 was added gene: VWA1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: VWA1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: VWA1 were set to 33459760; 33693694; 33559681 Phenotypes for gene: VWA1 were set to Hereditary motor neuropathy Review for gene: VWA1 was set to GREEN Added comment: Six different truncating variants identified in 15 affected individuals from six families (biallelic inheritance). Disease manifested in childhood or adulthood with proximal and distal muscle weakness predominantly of the lower limbs. Myopathological and neurophysiological findings were indicative of combined neurogenic and myopathic pathology. Early childhood foot deformity was frequent, but no sensory signs were observed. An additional 17 individuals from 15 families with hereditary motor neuropathy were identified. A 10-bp repeat expansion at the end of exon 1 was observed in 14 families and was homozygous in 10 of them. This mutation, c.62_71dup [p.Gly25Argfs*74], leads to a frameshift that results in a reduction in VWA1 transcript levels via nonsense-mediated decay. Sources: Literature |
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| Mendeliome v0.7121 | CLDN11 |
Melanie Marty gene: CLDN11 was added gene: CLDN11 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CLDN11 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: CLDN11 were set to 33313762 Phenotypes for gene: CLDN11 were set to Hypomyelinating leukodystrophy Review for gene: CLDN11 was set to GREEN Added comment: In three unrelated individuals with early-onset spastic movement disorder, expressive speech disorder and eye abnormalities including hypermetropia, 2 different heterozygous de novo stop-loss variants were identified. One of the variants did not lead to a loss of CLDN11 expression on RNA level in fibroblasts indicating this transcript is not subject to nonsense-mediated decay and most likely translated into an extended protein. Sources: Literature |
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| Mendeliome v0.6893 | IPO8 |
Zornitza Stark gene: IPO8 was added gene: IPO8 was added to Mendeliome. Sources: Expert Review Mode of inheritance for gene: IPO8 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: IPO8 were set to Loeys-Dietz syndrome-like; cardiovascular, neurologic, skeletal and immunologic abnormalities Review for gene: IPO8 was set to AMBER Added comment: 12 individuals from 9 unrelated families in a cohort submitted for publication with bi-allelic IPO8 variants. Variants were nonsense/splice and some missense. Patients displayed a phenotype reminiscent of Loeys Dietz syndrome that variably combined cardiovascular, neurologic, skeletal and immunologic abnormalities along with dysmorphic features. Western blot on patient cells (4 individuals) showed reduced IPO8 expression. Disruption of IPO8 homologue in zebrafish associated with cardiac anomalies. Transcriptome analysis in zebrafish showed that IPO8-deficient zebrafish had abnormal TGFbeta pathway expression. Sources: Expert Review |
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| Mendeliome v0.6846 | HDL2 |
Bryony Thompson STR: HDL2 was added STR: HDL2 was added to Mendeliome. Sources: Expert list Mode of inheritance for STR: HDL2 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for STR: HDL2 were set to 20301701 Phenotypes for STR: HDL2 were set to Huntington disease-like 2 MIM#606438 Review for STR: HDL2 was set to GREEN STR: HDL2 was marked as clinically relevant Added comment: NM_001271604.2:c.431CTG[X] or NM_020655.4:c.382+760CTG[X] In an alternatively spliced exon, the repeat can be transcribed in both directions, leading to CUG (more common) or CAG (less common) repeat-containing transcripts. While a dominant RNA toxic effect may occur, the repeat expansion also reduces levels of the Junctophilin-3 protein Normal: ≤28 repeats Questionable significance: 29-39 repeats, mutable normal or reduced penetrance included Full penetrance: ≥40 repeats Sources: Expert list |
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| Mendeliome v0.6742 | UBAP1 |
Zornitza Stark changed review comment from: PMID 31696996: Five unrelated families reported with childhood-onset HSP. A recurrent two‐base pair deletion (c.426_427delGA, p.K143Sfs*15) in the UBAP1 gene was found in four families, and a similar variant (c.475_476delTT, p.F159*) was detected in a fifth family. The variant was confirmed to be de novo in two families and inherited from an affected parent in two other families. RNA studies performed in lymphocytes from one patient with the de novo c.426_427delGA variant demonstrated escape of nonsense‐mediated decay of the UBAP1 mutant transcript, suggesting the generation of a truncated protein. Both variants identified are predicted to result in truncated proteins losing the capacity of binding to ubiquitinated proteins, hence appearing to exhibit a dominant‐negative effect on the normal function of the endosome‐specific endosomal sorting complexes required for the transport‐I complex.; to: PMID 31696996: Five unrelated families reported with childhood-onset HSP. A recurrent two‐base pair deletion (c.426_427delGA, p.K143Sfs*15) in the UBAP1 gene was found in four families, and a similar variant (c.475_476delTT, p.F159*) was detected in a fifth family. The variant was confirmed to be de novo in two families and inherited from an affected parent in two other families. RNA studies performed in lymphocytes from one patient with the de novo c.426_427delGA variant demonstrated escape of nonsense‐mediated decay of the UBAP1 mutant transcript, suggesting the generation of a truncated protein. Both variants identified are predicted to result in truncated proteins losing the capacity of binding to ubiquitinated proteins, hence appearing to exhibit a dominant‐negative effect on the normal function of the endosome‐specific endosomal sorting complexes required for the transport‐I complex. PMID 32934340: additional 7 families. Median age of onset 10yrs. |
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| Mendeliome v0.6171 | CLRN2 |
Paul De Fazio gene: CLRN2 was added gene: CLRN2 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CLRN2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CLRN2 were set to 33496845 Phenotypes for gene: CLRN2 were set to Non-syndromic hearing loss Review for gene: CLRN2 was set to AMBER gene: CLRN2 was marked as current diagnostic Added comment: Missense variant segregates with non-syndromic hearing loss in 3 members of a consanguineous family, two from one nuclear family and one from another. The variant was also shown to result in some transcripts being abnormally spliced, resulting in a premature stop codon. Functional studies in zebrafish and mice show the gene plays an essential role in normal organization and maintenance of the auditory hair bundles, and for hearing function. Rated Amber due to supporting functional studies in mice. Sources: Literature |
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| Mendeliome v0.5229 | PRKAR1B |
Konstantinos Varvagiannis gene: PRKAR1B was added gene: PRKAR1B was added to Mendeliome. Sources: Literature Mode of inheritance for gene: PRKAR1B was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: PRKAR1B were set to https://doi.org/10.1101/2020.09.10.20190314; 25414040 Phenotypes for gene: PRKAR1B were set to Global developmental delay; Intellectual disability; Autism; Attention deficit hyperactivity disorder; Aggressive behavior; Abnormality of movement; Upslanted palpebral fissure Penetrance for gene: PRKAR1B were set to unknown Review for gene: PRKAR1B was set to AMBER Added comment: Please consider inclusion of this gene with amber rating pending publication of the preprint and/or additional evidence. Marbach et al. (2020 - medRxiv : https://doi.org/10.1101/2020.09.10.20190314 - last author : C. Schaaf) report 6 unrelated individuals with heterozygous missense PRKAR1B variants. All presented formal ASD diagnosis (6/6), global developmental delay (6/6) and intellectual disability (all - formal evaluations were lacking though). Additional features included neurologic anomalies (movement disorders : dyspraxia, apraxia, clumsiness in all, with tremor/dystonia or involuntary movements as single occurrences). Three displayed high pain tolerance. Regression in speech was a feature in two. Additional behavior anomalies included ADHD (4-5/6) or aggression (3/6). There was no consistent pattern of malformations, physical anomalies or facial features (with the exception of uplsanted palpebral fissures reported in 4). 3 different missense variants were identified (NM_00116470:c.1003C>T - p.Arg335Trp, c.586G>A - p.Glu196Lys, c.500_501delAAinsTT - p.Gln167Leu) with Arg355Trp being a recurrent one within this cohort (4/6 subjects). A possible splicing effect may apply for the MNV. All variants are absent from gnomAD and the SNVs had CADD scores > 24. In all cases were parental samples were available (5/6), the variant had occurred as a de novo event. Protein kinase A (PKA) is a tetrameric holoenzyme formed by the association of 2 catalytic (C) subunits with a regulatory (R) subunit dimer. Activation of PKA is achieved through binding of 2 cAMP molecules to each R-subunit, and unleashing(/dissociation) of C-subunits to engage substrates. PRKACA/B genes encode the Cα- and Cβ-subunits while the 4 functionally non-redundant regulatory subunits are encoded by PRKAR1A/1B/2A/2B genes. As the authors comment, the RIβ subunit is primarily expressed in brain with higher expression in cortex and hypothalamus. The functional consequences of the variants at cellular level were not studied. Previous studies have demonstrated that downregulation of RIβ in murine hippocampal cultures, reduced phosphorylation of CREB, a transcription factor involved in long-term memory formation. The authors speculate that a similar effect on cAMP/PKA/CREB cascade may mediate the cognitive effects in humans. RIβ deficient mice also display diminished nociceptive pain, similar to the human phenotype. [Several refs provided]. The authors cite the study by Kaplanis et al (2020 - PMID: 33057194), where in a large sample of 31,058 trio exomes of children with developmental disorders, PRKAR1B was among the genes with significant enrichment for de novo missense variants. [The gene has a pLI score of 0.18 in gnomAD / o/e = 0.26 - so pLoF variants may not be deleterious]. Please note that a specific PRKAR1B variant (NM_002735.2:c.149T>G - p.Leu50Arg) has been previous reported to segregate with a late-onset neurodegenerative disorder characterized by dementia and/or parkinsonism within a large pedigree with 12 affected individuals [Wong et al 2014 - PMID: 25414040]. Sources: Literature |
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| Mendeliome v0.4520 | SLC12A2 |
Zornitza Stark edited their review of gene: SLC12A2: Added comment: Monoallelic : DD/ID was a feature in >= 6 individuals with monoallelic de novo SLC12A2. An individual with an exon 22 truncating variant was reported to have normal milestones and cognitive function. Exon 21 variants have been described in individuals with rather isolated hearing impairment (possibly some associated motor delay, but normal cognition). Hearing impairment was also reported in 2/6 patients with variants in other exons (1 missense / 1 frameshift). Biallelic : DD/ID was reported in at least 3 individuals in literature. Hearing impairment has been reported on 2 occasions (although this was not probably evaluated in all subjects). --- Monoallelic SLC12A2 mutations : ► Individuals with de novo mutations and developmental disorder were first identified by the DDD study (2017 - PMID: 28135719). 5 of them have been reported in detail by McNeill et al (below). ► McNeill et al (2020 - PMID: 32658972) report on 6 individuals with neurodevelopmental disorder due to de novo SLC12A2 mutation. All presented DD or ID ranging from mild to severe. ASD was reported in 3/6. Sensorineural hearing loss was a feature in 2/6 with the remaining having normal formal evaluations. Brain, cardiac and/or additional malformations were reported in a single individual. Following non-diagnostic prior work-up (CMA, FMR1 or other investigations) trio exome sequencing revealed missense (4/6) or truncating variants (2/6). Three additional individuals (incl. a father and his son) with missense variants in exon 21 (NM_001046.3 / p.Glu979Lys and p.Glu980Lys) presented with bilateral sensorineural hearing loss. Speech and/or motor delay reported in these cases were attributed to the hearing impairment/vestibular arreflexia (cognitive abilities not tested). SLC12A2 encodes sodium-potassium-chloride transporter 1 (also NKCC1). The GTEx project has identified 8 isoforms. In brain both exon 21-containing/deleted isoforms are expressed (cited Morita et al 2014 - PMID: 24695712). As the authors discuss, RNA-seq of the developing mouse cochlea suggests that the exon 21 containing isoform is the single transcript expressed. Evidence from RNA-seq data (BrainSpan project) and literature suggests that the significant amounts of exon 21 lacking isoforms in fetal brain compensate for the deleterious effects of exon 21 variants and explain the lack of NDD in relevant patients. Slc12a2 (NKCC1) null mouse model has demonstrated that the transporter plays a role in accumulation of the potassium rich endolymph in the inner ear, with NKCC1 absence causing sensorineural deafness and imbalance. Slc12a2 display cochlear malformations, loss of hair cells and hearing impairment (cited Delpire et al 1999 - PMID: 10369265). The brain phenotype has not been studied extensively, although loss of Slc12a2 has been shown to inhibit neurogenesis (cited: Magalhães and Rivera et al. - PMID: 27582690). Slc12a2 null zebrafish display a collapse of the otic vesicle and reduced endolymph (Abbas and Whitfield, 2009 - PMID: 19633174) relevant to the human hearing disorder. In vitro assessment of NKCC1 ion transporter function in Xenopus laevis, supported the deleterious effect of the identified variants (significant reduction in K+ influx). Using available single cell RNA-seq data the authors further demonstrated that SLC12A2 expressing cells display transcriptomic profiles reflective of active neurogenesis. ► Delpire et al (2016 - PMID: 27900370 - not reviewed in detail) described a 13 y.o. girl harboring a de novo 11-bp deletion in SLC12A2 exon 22. This individual reached developmental milestones on time and had a NORMAL cognitive function. Hearing was seemingly normal. Features included orthostatic intolerance, respiratory weakness, multiple endocrine abnormalities, pancreatic insufficiency and multiorgan failure incl. gut and bladder. Exome in the proband, parents and 3 unaffected sibs suggested SLC12A2 as the only candidate for her phenotype. Functional analyses in Xenopus laevis oocytes suggested that a non functional transporter was expressed and trafficked to the membrane as the wt. Detection of the truncated protein at higher molecular sizes suggested either enhanced dimerization or misfolded aggregate. There was no dominant-negative effect of mutant NKCC1. In patient fibroblasts a reduced total and NKCC1-mediated K+ influx. ► Mutai et al (2020 - PMID: 32294086) report on several individuals from 4 families, harboring variants within exon 21 or - in one case - at it's 3' splice-site (leading to skipping oe this exon at the mRNA level). All subjects were investigated for severe/profound hearing loss (in line with the role of exon 21-included isoforms in cochlea. The variant segregated with hearing impairment in 3 generations of a family while in all other subjects the variant had occured as de novo event. Despite motor delays (e.g. the subject from fam2 could not hold head or sit at the age of 10m / the proband in Fam3 was able to hold his head and walk at 6 and 20 m respectively) behavior and cognition were commented to be within normal range. ----- Biallelic SLC12A2 mutations: ► Anazi et al (2017 - PMID: 29288388) briefly reported on a 3 y.o. boy (17DG0776) with central hypotonia, neonatal respiratory distress, failure to thrive, global DD and microcephaly and a skeletal survey suggestive of osteopenia. After non-diagnostic prior investigations (CMA revealing a 1p duplication classified as VUS, extensive metabolic workup), WES revealed a homozygous SLC12A2 splicing variant [NM_001046.2:c.2617-2A>G]. ► Macnamara et al (2019 - PMID: 30740830) described a 5.5 y.o. male with sensorineural hearing loss, profound delays in all developmental areas among several other features (choanal atresia, failure to thrive, respiratory problems, absent sweat and tear production or salivation, GI abnormalities). Genetic testing for several disorders considered (cystic fibrosis, spinal muscular atrophy, sequencing and del/dup analysis of mtDNA) was normal. CMA revealed paternal uniparental isodisomy for chr. 5 and WGS a homozygous 22kb deletion in SLC12A2. This was followed by confirmation of homozygosity in the proband, heterozygosity of the unaffected father, delineation of breakpoints (chr5:127441491-127471419). mRNA studies in patient fibroblasts confirmed deletion of ex2-7, splicing of ex1 directly to ex8 and introduction of a premature stop codon in ex9. qRT-PCR confirmed that mRNA is likely subjected to NMD (expression ~80% of control). Western blot confirmed absence of the protein in the patient's fibroblasts. Again mouse models are thought to recapitulate the hearing defect but also the deficient saliva production (cited Evans et al 2000 - PMID: 10831596). Again the authors speculate a role of SLC12A2 in brain development based on evidence from murine models (migration, dendritic growth, increse in neuron density through regulation of GABAergic signalling (Young et al 2012 - PMID: 23015452). Hypotheses are also made on a regulatory relationship between NKCC1 and CFTR based on mRNA data from the ko mouse model. ► Stödberg et al (2020 - PMID: 32754646) reported 2 sibs with a complex neurodevelopmental disorder due to compound heterozygosity for a frameshift SLC12A2 variant and a splicing one (NM_001046:c.1431delT and c.2006-1G>A). Both presented hypotonia, neonatal S. aureus parotitis and respiratory problems (incl. apneas). While the older sib died at the age of 22 days, the younger one had persistent respiratory issues incl. a dry respiratory mucosa motivating metabolic, immunology investigations and testing for CF. She displayed microcephaly (OFC -2.5 SD, H was also -3.5SD), severe intellectual disability. MRI was suggestive of white matter and basal ganglia abnormalities. Other features incl. hearing impairment, and lack of tears,saliva and sweat, constipation and intestinal malrotation. There was facial dysmorphism. The variants were the only retained following WGS of the 2 affected sisters, parents and an unaffected brother. The splicing variant was shown to result in skipping of exon 13, while the indel in NMD. Again the authors discuss that the deficient saliva production, impaired hearing and GI problems are recapitulated in the mouse model (several refs provided).; Changed rating: GREEN; Changed publications: 28135719, 32658972, 27900370, 32294086, 29288388, 30740830, 32754646; Changed phenotypes: Kilquist syndrome, deafness, intellectual disability, dysmorphic features, absent salivation, ectodermal dysplasia, constipation, intestinal malrotation, multiple congenital anomalies; Changed mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal |
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| Mendeliome v0.4503 | 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 |
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| Mendeliome v0.4309 | ZSWIM6 |
Zornitza Stark changed review comment from: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype. MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp; to: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X) identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype. MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp |
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| Mendeliome v0.4309 | ZSWIM6 |
Zornitza Stark changed review comment from: MIM #617865 A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype. MIM#603671: recurrent missense identified in 6 unrelated families, p.Arg1163Trp; to: MIM #617865 (NEDMAGA): A recurrent de novo heterozygous truncating mutation in the ZSWIM6 gene (R913X)identified in 7 unrelated patients. Analysis of patient cells indicated that the mutant transcript escaped nonsense-mediated mRNA decay, and most likely produced a truncated protein, although antibody studies were unable to detect a truncated protein. Possible dominant-negative effect. NB a more proximal nonsense variant was also reported inherited in a family with an unaffected mother: loss of function variants may not cause a phenotype. MIM#603671 (acromelic frontonasal dysplasia): recurrent missense identified in 6 unrelated families, p.Arg1163Trp |
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| Mendeliome v0.4128 | CRIPT | Zornitza Stark Marked gene: CRIPT as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4128 | CRIPT | Zornitza Stark Gene: cript has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4128 | CRIPT | Zornitza Stark Classified gene: CRIPT as Amber List (moderate evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4128 | CRIPT | Zornitza Stark Gene: cript has been classified as Amber List (Moderate Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.4125 | CRIPT |
Ain Roesley gene: CRIPT was added gene: CRIPT was added to Mendeliome. Sources: Literature Mode of inheritance for gene: CRIPT was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CRIPT were set to 24389050; 27250922 Phenotypes for gene: CRIPT were set to Short stature with microcephaly and distinctive facies (MIM#615789) Penetrance for gene: CRIPT were set to unknown Review for gene: CRIPT was set to AMBER Added comment: PMID: 24389050 - 2 unrelated probands homozygous for PTVs. However 1 was deceased and DNA was unavailable therefore parents were sequenced PMID: 27250922 - 1x proband - het for a missense which was maternally inherited. Because the father was negative for SNVs, they did CMA and found a small heterozygous deletion 1.6kb in size encompassing exon 1 of CRIPT. This deletion was paternally inherited *did not find new reports since Sources: Literature |
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| Mendeliome v0.3834 | TAF1C |
Zornitza Stark gene: TAF1C was added gene: TAF1C was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: TAF1C was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: TAF1C were set to 32779182 Phenotypes for gene: TAF1C were set to Global developmental delay; Intellectual disability; Spasticity; Strabismus; Seizures; Abnormality of nervous system morphology Review for gene: TAF1C was set to AMBER Added comment: Knuutinen et al (2020 - PMID: 32779182) report on 2 individuals from 2 consanguineous families, homozygous for TAF1C missense variants. Both presented with an early onset neurological phenotype with severe global DD, ID (2/2 - moderate and profound), spasticity (2/2), ophthalmic findings (strabismus 2/2, nystagmus 1/2). Epilepsy, abnormal brain MRI (cerebral and cerebellar atrophy and white matter hyperintensities) as well and additional findings were reported in one (always the same individual). Following a normal CMA, exome in the first case revealed a homozygous missense SNV (NM_005679.3:c.1165C>T / p.Arg389Cys) supported by in silico predictions. mRNA and protein levels were substantially reduced in fibroblasts from this subject. Only the patient and parents were tested for the variant but not 3 unaffected sibs (fig1). The second individual was homozygous for another missense variant (p.Arg405Cys) also supported by in silico predictions. The girl was the single affected person within the family with an unaffected sib and parents heterozygous for the variant. Several other unaffected relatives in the extended pedigree were either carriers for this variant or homozygous for the wt allele. TAF1C encodes the TATA-box binding protein associated factor (TAF) RNA polymerase I subunit. RNA polymerase I (Pol I) transcribes genes to produce rRNA. For Pol I to initiate transcription, two transcription factors are required : UBF (upstream binding factor encoded by UBTF) and SL1 (selectivity factor 1). The latter is formed by TBP (TATA-binding protein) and 3 Pol I-specific TBP-associated factors (TAFs). A recurrent de novo missense variant in UBTF (encoding the other Pol I transcription factor) causes a disorder with highly similar features. The specific variant acts through a gain-of-function mechanism (and not by LoF which appears to apply for TAF1C based on expression data). The authors hypothesize that altered Pol I activity and resulting ribosomal stress could cause the microcephaly and leukodystrophy (both reported in 1 - the same - individual). Sources: Expert list |
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| Mendeliome v0.3732 | FAM50A |
Zornitza Stark gene: FAM50A was added gene: FAM50A was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FAM50A was set to X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males) Publications for gene: FAM50A were set to 32703943 Phenotypes for gene: FAM50A were set to Mental retardation syndrome, X-linked, Armfield type (MIM #300261) Review for gene: FAM50A was set to GREEN Added comment: Lee et al (2020 - PMID: 32703943) provide evidence that Armfield X-Linked intellectual disability syndrome is caused by monoallelic FAM50A pathogenic variants. The current review is based only on this reference. The authors provide clinical details on 6 affected individuals from 5 families. Features included postnatal growth delay, DD and ID (6/6 - also evident for those without formal IQ assesment), seizures (3/6 from 2 families), prominent forehead with presence of other facial features and variable head circumference (5th to >97th %le), ocular anomalies (5/6 - strabismus/nystagmus/Axenfeld-Rieger), cardiac (3/6 - ASD/Fallot) and genitourinary anomalies (3/6). In the first of these families (Armfield et al 1999 - PMID: 10398235), linkage analysis followed by additional studies (Sanger, NGS of 718 genes on chrX, X-exome NGS - several refs provided) allowed the identification of a FAM50A variant. Variants in other families were identified by singleton (1 fam) or trio-ES (3 fam). In affected individuals from 3 families, the variant had occurred de novo. Carrier females in the other families were unaffected (based on pedigrees and/or the original publication). XCI was rather biased in most obligate carrier females from the 1st family (although this ranged from 95:5 to 60:40). Missense variants were reported in all affected subjects incl. Trp206Gly, Asp255Gly, Asp255Asn (dn), Glu254Gly (dn), Arg273Trp (dn) (NM_004699.3). Previous studies have demonstrated that FAM50A has ubiquitous expression in human fetal and adult tissues (incl. brain in fetal ones). Immunostaining suggests a nuclear localization for the protein (NIH/3T3 cells). Comparison of protein levels in LCLs from affected males and controls did not demonstrate significant differences. Protein localization for 3 variants (transfection of COS-7 cells) was shown to be similar to wt. Complementation studies in zebrafish provided evidence that the identified variants confer partial loss of function (rescue of the morpholino phenotype with co-injection of wt but not mt mRNA). The zebrafish ko model seemed to recapitulate the abnormal development of cephalic structures and was indicative of diminished/defective neurogenesis. Transcriptional dysregulation was demonstrated in zebrafish (altered levels and mis-splicing). Upregulation of spliceosome effectors was demonstrated in ko zebrafish. Similarly, mRNA expression and splicing defects were demonstrated in LCLs from affected individuals. FAM50A pulldown followed by mass spectrometry in transfected HEK293T cells demonstrated enrichment of binding proteins involved in RNA processing and co-immunoprecipitation assays (transfected U-87 cells) suggested that FAM50A interacts with spliceosome U5 and C-complex proteins. Overall aberrant spliceosome C-complex function is suggested as the underlying pathogenetic mechanism. Several other neurodevelopmental syndromes are caused by variants in genes encoding C-complex affiliated proteins (incl. EFTUD2, EIF4A3, THOC2, etc.). Sources: Literature |
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| Mendeliome v0.3262 | AKR1E2 |
Zornitza Stark gene: AKR1E2 was added gene: AKR1E2 was added to Mendeliome. Sources: Expert list Mode of inheritance for gene: AKR1E2 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: AKR1E2 were set to 26622071 Phenotypes for gene: AKR1E2 were set to congenital cataracts Review for gene: AKR1E2 was set to RED Added comment: Same family with homozygous canonical splice variants and 3 cases of congenital cataract described in 2012 (original) and 2015 (review). No other descriptions since. Sources: Expert list |
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| Mendeliome v0.3242 | SREBF1 |
Paul De Fazio gene: SREBF1 was added gene: SREBF1 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: SREBF1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: SREBF1 were set to 32497488 Phenotypes for gene: SREBF1 were set to IFAP (ichthyosis follicularis, atrichia, and photophobia) syndrome Review for gene: SREBF1 was set to GREEN gene: SREBF1 was marked as current diagnostic Added comment: 11 unrelated, ethnically diverse individuals with autosomal-dominant IFAP syndrome. 3 different msisense variants identified affecting the same region (residues 527, 528, and 530). Functional studies support impaired function (impaired nuclear translocation of the transcriptionally active form of SREBP1 resulting in lower expression of the SREBP1 variants). Increased keratinocyte apoptosis was observed in patient scalp samples. Sources: Literature |
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| Mendeliome v0.3014 | DSCR3 |
Zornitza Stark gene: DSCR3 was added gene: DSCR3 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: DSCR3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: DSCR3 were set to 31845315 Phenotypes for gene: DSCR3 were set to Intellectual disability, no OMIM # yet Review for gene: DSCR3 was set to RED Added comment: 1 family/2 cousins with cognitive impairment, growth failure, skeletal abnormalities, and distinctive facial features. Both shared the homozygous nonsense variant c.178G>T (p.Glu60*) in the VPS26C gene. This gene encodes VPS26C, a member of the retriever integral membrane protein recycling pathway. The nature of the variant which is predicted to result in loss‐of‐function, expression studies revealing significant reduction in the mutant transcript, and the co‐segregation of the homozygous variant with the phenotype in two affected individuals. Sources: Literature |
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| Mendeliome v0.2598 | WDR83OS |
Ee Ming Wong gene: WDR83OS was added gene: WDR83OS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: WDR83OS was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: WDR83OS were set to PMID: 30250217 Phenotypes for gene: WDR83OS were set to Cholestasis Review for gene: WDR83OS was set to RED Added comment: - 1 consanguineous family with 3 affected individuals found to carry a homozygous splice site variant in WDR83OS - The variant results in an aberrant truncated RNA transcript as demonstrated by RT-PCR Sources: Literature |
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| Mendeliome v0.2365 | FUS |
Elena Savva gene: FUS was added gene: FUS was added to Mendeliome. Sources: Literature Mode of inheritance for gene: FUS was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: FUS were set to PMID: 32281455; 20668259; 20385912 Phenotypes for gene: FUS were set to Amyotrophic lateral sclerosis 6, with or without frontotemporal dementia 608030; Essential tremor, hereditary, 4 614782 Mode of pathogenicity for gene: FUS was set to Other Review for gene: FUS was set to GREEN Added comment: PMID: 32281455 - Reports a case of Pediatric Amyotrophic Lateral Sclerosis. Reviews and shows multiple other reports of ALS casued by FUS PMID: 20668259 - additional reports of ALS PMID: 20385912 - postulated that disruption of this region may disrupt subcellular distribution of FUS, in turn affecting transcription and RNA processing and conferring a toxic gain of function. Sources: Literature |
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| Mendeliome v0.2361 | USP45 |
Kristin Rigbye gene: USP45 was added gene: USP45 was added to Mendeliome. Sources: Literature Mode of inheritance for gene: USP45 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: USP45 were set to 30573563 Phenotypes for gene: USP45 were set to Leber congenital amaurosis; retinal dystrophy Review for gene: USP45 was set to GREEN Added comment: 2 unrelated Chinese families reported with rare homozygous variants (one missense, one nonsense) and Leber congenital amaurosis. Animal knockout functional studies supported gene-disease association. PMID: 30573563 "By analysing WES data based on allele frequencies of in-house controls, population allele frequencies and in silico prediction tools, two rare homozygous mutations in USP45 were identified in two unrelated families. Immunohistochemistry of USP45 in the human and zebrafish retinal sections revealed enriched expression in the inner segments of photoreceptors. The knockdown of usp45 transcript in zebrafish led to abnormal retinal development with effects on photoreceptors, which could be successfully rescued by wild-type usp45 mRNA. Moreover, targeted knockout of Usp45 in mice caused abnormal electroretinography responses, similar to that seen in patients with LCA." Sources: Literature |
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| Mendeliome v0.785 | SLC35A3 |
Zornitza Stark Added comment: Comment when marking as ready: 1 family with 2 sibs, with segregation but no functional studies. 1 family with 8 affected people. The mutations segregated with the disorder in the family. Patient cells showed no normal transcript, indicating that they had no functional SLC35A3 protein. Golgi vesicles derived from patient fibroblasts showed significantly reduced transport of UDP-GlCNAc compared to controls. |
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| Mendeliome v0.308 | PISD | Zornitza Stark commented on gene: PISD: 4 individuals in 2 unrelated but consanguineous families from Portugal and Brazil affected by early-onset retinal degeneration, sensorineural hearing loss, microcephaly, intellectual disability, and skeletal dysplasia with scoliosis and short stature (Liberfarb syndrome). Affected individuals shared a homozygous 10-bp deletion immediately upstream of the last exon of the PISD gene. In HEK293T cells, this variant led to aberrant splicing of PISD transcripts. 1 family with 2 sisters with congenital cataracts, short stature, and white matter changes identified compound heterozygous variants in the PISD gene. Decreased conversion of phosphatidylserine to PE in patient fibroblasts is consistent with impaired phosphatidylserine decarboxylase (PISD) enzyme activity. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mendeliome v0.303 | PHF21A |
Zornitza Stark gene: PHF21A was added gene: PHF21A was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: PHF21A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PHF21A were set to 31649809; 30487643; 22770980 Phenotypes for gene: PHF21A were set to Intellectual disability; dysmorphic features Review for gene: PHF21A was set to GREEN Added comment: 9 cases with intellectual disability and craniofacial anomalies (Potocki-Shaffer syndrome), with de novo truncating variants in PHF21A. No functional evidence of variants, but PHF21A is highly expressed in the human fetal brain, which is consistent with the neurodevelopmental phenotype. 2 other unrelated individuals with translocations disrupting PHF21A. Lymphoblastoid cell lines from translocation subjects showed derepression of the neuronal gene SCN3A and reduced LSD1 occupancy at the SCN3A promoter, supporting a direct functional consequence of PHF21A haploinsufficiency on transcriptional regulation. Sources: Literature |
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| Mendeliome v0.290 | MEPCE |
Zornitza Stark gene: MEPCE was added gene: MEPCE was added to Mendeliome_VCGS. Sources: Literature Mode of inheritance for gene: MEPCE was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: MEPCE were set to 31467394 Phenotypes for gene: MEPCE were set to Intellectual disability; seizures Review for gene: MEPCE was set to RED Added comment: 1 patient with global DD and seizures with de novo MEPCE nonsense variant. mRNA and protein analyses identified nonsense-mediated mRNA decay to underlie the decreased amount of MEPCE in patient fibroblasts followed by LARP7 and 7SK snRNA downregulation and HEXIM1 upregulation. Flavopiridol treatment and ectopic MEPCE protein expression in patient fibroblasts rescued increased expression of six RNAP II-sensitive genes and suggested a possible repressive effect of MEPCE on P-TEFb-dependent transcription of specific genes. Sources: Literature |
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| Mendeliome v0.169 | CDK16 |
Zornitza Stark gene: CDK16 was added gene: CDK16 was added to Mendeliome_VCGS. Sources: Expert list Mode of inheritance for gene: CDK16 was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females Publications for gene: CDK16 were set to 25644381 Phenotypes for gene: CDK16 were set to Intellectual disability Review for gene: CDK16 was set to AMBER Added comment: Single family described in this manuscript describing multiple candidate genes for XLID. Sources: Expert list |
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