ClinVar Miner

Submissions for variant NM_001037.5(SCN1B):c.448+111C>T

gnomAD frequency: 0.00005  dbSNP: rs758654948
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000469974 SCV000545172 uncertain significance Brugada syndrome 5 2024-10-16 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 187 of the SCN1B protein (p.Arg187Cys). This variant is present in population databases (rs758654948, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with SCN1B-related conditions. ClinVar contains an entry for this variant (Variation ID: 406500). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Probably Damaging". The cysteine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.
GeneDx RCV000614197 SCV000729876 likely benign not specified 2018-01-05 criteria provided, single submitter clinical testing This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
PreventionGenetics, part of Exact Sciences RCV004735539 SCV005362595 uncertain significance SCN1B-related disorder 2024-05-23 no assertion criteria provided clinical testing The SCN1B c.559C>T variant is predicted to result in the amino acid substitution p.Arg187Cys. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.010% of alleles in individuals of East Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence.

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