ClinVar Miner

Submissions for variant NM_001035.3(RYR2):c.226C>T (p.Arg76Trp)

gnomAD frequency: 0.00001  dbSNP: rs542777295
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000480543 SCV000570033 uncertain significance not provided 2020-04-16 criteria provided, single submitter clinical testing Has not been previously published as pathogenic or benign to our knowledge; Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not located in one of the three hot-spot regions of the RYR2 gene, where the majority of pathogenic missense variants occur (Medeiros-Domingo et al., 2009)
Invitae RCV002526589 SCV002258459 uncertain significance Catecholaminergic polymorphic ventricular tachycardia 1 2021-08-31 criteria provided, single submitter clinical testing This sequence change replaces arginine with tryptophan at codon 76 of the RYR2 protein (p.Arg76Trp). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and tryptophan. This variant is present in population databases (rs542777295, ExAC 0.01%). This variant has not been reported in the literature in individuals affected with RYR2-related conditions. ClinVar contains an entry for this variant (Variation ID: 420977). 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 RYR2 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.
Color Diagnostics, LLC DBA Color Health RCV003532140 SCV004358244 uncertain significance Cardiomyopathy 2022-10-11 criteria provided, single submitter clinical testing This missense variant replaces arginine with tryptophan at codon 76 of the RYR2 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual suspected of having catecholaminergic polymorphic ventricular tachycardia (PMID: 29453246). This variant has been identified in 3/280598 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.

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