ClinVar Miner

Submissions for variant NM_000335.5(SCN5A):c.229G>A (p.Gly77Arg)

dbSNP: rs1228779956
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Total submissions: 5
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Color Diagnostics, LLC DBA Color Health RCV001842688 SCV001341703 uncertain significance Cardiac arrhythmia 2023-03-10 criteria provided, single submitter clinical testing This missense variant replaces glycine with arginine at codon 77 of the SCN5A protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with SCN5A-related disorders in the literature. This variant has been identified in 1/244766 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.
Labcorp Genetics (formerly Invitae), Labcorp RCV003656665 SCV001509838 uncertain significance not provided 2024-06-06 criteria provided, single submitter clinical testing This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 77 of the SCN5A protein (p.Gly77Arg). This variant is present in population databases (no rsID available, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with SCN5A-related conditions. ClinVar contains an entry for this variant (Variation ID: 919345). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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.
Fulgent Genetics, Fulgent Genetics RCV002491507 SCV002775406 uncertain significance Brugada syndrome 1; Long QT syndrome 3; Sick sinus syndrome 1; Progressive familial heart block, type 1A; Ventricular fibrillation, paroxysmal familial, type 1; Dilated cardiomyopathy 1E; SUDDEN INFANT DEATH SYNDROME; Atrial fibrillation, familial, 10 2021-08-18 criteria provided, single submitter clinical testing
All of Us Research Program, National Institutes of Health RCV001842688 SCV004816573 uncertain significance Cardiac arrhythmia 2024-06-11 criteria provided, single submitter clinical testing This missense variant replaces glycine with arginine at codon 77 of the SCN5A protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with SCN5A-related disorders in the literature. This variant has been identified in 1/244766 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.
Ambry Genetics RCV004986874 SCV005500169 uncertain significance Cardiovascular phenotype 2024-08-14 criteria provided, single submitter clinical testing The p.G77R variant (also known as c.229G>A), located in coding exon 1 of the SCN5A gene, results from a G to A substitution at nucleotide position 229. The glycine at codon 77 is replaced by arginine, an amino acid with dissimilar properties. This variant was reported in a long QT syndrome cohort (Walsh R et al. Genet Med, 2021 Jan;23:47-58). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

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