Total submissions: 6
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Ambry Genetics | RCV000190749 | SCV000244190 | pathogenic | Inborn genetic diseases | 2021-07-20 | criteria provided, single submitter | clinical testing | The c.68A>G (p.Y23C) alteration is located in exon 3 (coding exon 1) of the CDC42 gene. This alteration results from an A to G substitution at nucleotide position 68, causing the tyrosine (Y) at amino acid position 23 to be replaced by a cysteine (C). Based on data from the Genome Aggregation Database (gnomAD), the CDC42 c.68A>G alteration was not observed, with coverage at this position. This mutation occurred de novo in two individuals with intellectual deficiency, growth failure, microcephaly, and dysmorphic facial features (Helbig, 2016; Martinelli, 2018; Ambry internal data). Functional analysis demonstrated that the Y23C alteration results in weaker interactions between CDC42 and PAK1, WASP, and FMNL2 as well as a significant decrease in wound healing assay and cell proliferation compared to wild-type (Martinelli, 2018). The p.Y23C alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, this alteration is classified as pathogenic. |
Ce |
RCV001093410 | SCV001250374 | pathogenic | not provided | 2019-09-01 | criteria provided, single submitter | clinical testing | |
Laboratory of Molecular Genetics |
RCV001374925 | SCV001572212 | pathogenic | Neurodevelopmental disorder | 2021-03-11 | criteria provided, single submitter | clinical testing | |
Gene |
RCV001093410 | SCV001758326 | pathogenic | not provided | 2022-11-15 | criteria provided, single submitter | clinical testing | Published functional studies demonstrated a decrease in GAP-stimulated GTP hydrolysis and reduced binding to WASP and FMNL2 proteins, and a wound healing assay showed impaired proliferation of cells (Martinelli et al., 2018); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 31601675, 26795593, 29394990, 27513193, 32231661, 30696065, 33936654) |
Women's Health and Genetics/Laboratory Corporation of America, |
RCV002509288 | SCV002819575 | pathogenic | Macrothrombocytopenia-lymphedema-developmental delay-facial dysmorphism-camptodactyly syndrome | 2022-12-15 | criteria provided, single submitter | clinical testing | Variant summary: CDC42 c.68A>G (p.Tyr23Cys) results in a non-conservative amino acid change located in the Small GTP-binding protein domain (IPR005225) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251282 control chromosomes. c.68A>G has been reported in the literature in individuals affected with Macrothrombocytopenia-Lymphedema Delay-Facial Dysmorphism-Camptodactyly Syndrome and related disorders (Martinelli_2018, Flynn_2021, Helbig_2016 and Farwell_2017). These data indicate that the variant is likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function (Martinelli_2018). The variant showed significantly decreased binding affinity and decreased proliferation. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as pathogenic (n=3) and likely pathogenic (n=1). Based on the evidence outlined above, the variant was classified as pathogenic. |
University of Washington Center for Mendelian Genomics, |
RCV001291420 | SCV001479921 | likely pathogenic | Abnormal facial shape; Abnormality of blood and blood-forming tissues; Abnormality of the immune system; Postnatal growth retardation; Neurodevelopmental abnormality | no assertion criteria provided | research |