Submissions for variant NM_024422.6(DSC2):c.2162C>T (p.Thr721Met)

gnomAD frequency: 0.00006  dbSNP: rs759513934

Total submissions: 7

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Illumina Laboratory Services, Illumina	RCV001126572	SCV001285789	uncertain significance	Arrhythmogenic right ventricular dysplasia 11	2018-01-13	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Color Diagnostics, LLC DBA Color Health	RCV001190421	SCV001357903	uncertain significance	Cardiomyopathy	2023-02-16	criteria provided, single submitter	clinical testing	This missense variant replaces threonine with methionine at codon 721 of the DSC2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 6/251264 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	RCV001126572	SCV001394130	uncertain significance	Arrhythmogenic right ventricular dysplasia 11	2023-12-06	criteria provided, single submitter	clinical testing	This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 721 of the DSC2 protein (p.Thr721Met). This variant is present in population databases (rs759513934, gnomAD 0.004%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 31983221). ClinVar contains an entry for this variant (Variation ID: 872389). 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 not expected to disrupt DSC2 protein function with a negative predictive value of 80%. 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.
Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein	RCV002252315	SCV002523484	uncertain significance	See cases	2020-01-27	criteria provided, single submitter	clinical testing	ACMG classification criteria: PM2, BP4
Ambry Genetics	RCV002429754	SCV002727341	benign	Cardiovascular phenotype	2023-11-02	criteria provided, single submitter	clinical testing	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.
Fulgent Genetics, Fulgent Genetics	RCV001126572	SCV002788590	uncertain significance	Arrhythmogenic right ventricular dysplasia 11	2021-10-28	criteria provided, single submitter	clinical testing
All of Us Research Program, National Institutes of Health	RCV004000220	SCV004816089	uncertain significance	Familial isolated arrhythmogenic right ventricular dysplasia	2023-12-01	criteria provided, single submitter	clinical testing	This missense variant replaces threonine with methionine at codon 721 of the DSC2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 6/251264 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.