ClinVar Miner

Submissions for variant NM_000435.3(NOTCH3):c.350G>A (p.Cys117Tyr)

dbSNP: rs773539041
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Athena Diagnostics Inc RCV000518059 SCV000614287 pathogenic not provided 2022-08-24 criteria provided, single submitter clinical testing This variant has been identified in at least one individual with clinical features of CADASIL. This variant has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). This variant alters a critical location within the protein, and is expected to severely affect function and cause disease. Greater than 90% of NOTCH3 pathogenic variants associated with CADASIL involve the gain or loss of a cysteine residue within the epidermal growth factor (EGF)-like repeat domain (PMID: 32457593, 20301673).
Invitae RCV000518059 SCV003443136 pathogenic not provided 2023-11-03 criteria provided, single submitter clinical testing This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 117 of the NOTCH3 protein (p.Cys117Tyr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with cerebral arteriopathy with subcortical infarcts and leukoencephalopathy (PMID: 19542611, 22639698). ClinVar contains an entry for this variant (Variation ID: 447837). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt NOTCH3 protein function with a positive predictive value of 95%. This variant disrupts the p.Cys117 amino acid residue in NOTCH3. Other variant(s) that disrupt this residue have been observed in individuals with NOTCH3-related conditions (PMID: 10227618, 31554780), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic.

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