ClinVar Miner

Submissions for variant NM_001943.5(DSG2):c.977A>T (p.Asp326Val)

gnomAD frequency: 0.00002  dbSNP: rs769699241
Minimum review status: Collection method:
Minimum conflict level:
ClinVar version:
Total submissions: 4
Download table as spreadsheet
Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Ambry Genetics RCV000618341 SCV000736230 uncertain significance Cardiovascular phenotype 2016-03-30 criteria provided, single submitter clinical testing The p.D326V variant (also known as c.977A>T), located in coding exon 8 of the DSG2 gene, results from an A to T substitution at nucleotide position 977. The aspartic acid at codon 326 is replaced by valine, an amino acid with highly dissimilar properties. This variant was detected in a patient reported to have arrhythmogenic right ventricular dysplasia/cardiomyopathy, who also had a nonsense alteration in the PKP2 gene (Fressart V et al. Europace. 2010;12(6):861-8). Based on data from ExAC, the T allele was reported in 2 of 120684 (0.001%) total alleles (Exome Aggregation Consortium (ExAC), Cambridge, MA (URL: http://exac.broadinstitute.org) [Accessed March 21, 2016]). This variant was not reported in population based cohorts in the following databases: Database of Single Nucleotide Polymorphisms (dbSNP), NHLBI Exome Sequencing Project (ESP), and 1000 Genomes Project. In the ESP, this variant was not observed in 5971 samples (11942 alleles) with coverage at this position. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this variant remains unclear.
Labcorp Genetics (formerly Invitae), Labcorp RCV001067163 SCV001232206 uncertain significance Arrhythmogenic right ventricular dysplasia 10 2023-08-31 criteria provided, single submitter clinical testing 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. 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DSG2 protein function. ClinVar contains an entry for this variant (Variation ID: 518781). This missense change has been observed in individual(s) with clinical features of DSG2-related conditions (PMID: 20400443). This variant is present in population databases (rs769699241, gnomAD 0.01%). This sequence change replaces aspartic acid, which is acidic and polar, with valine, which is neutral and non-polar, at codon 326 of the DSG2 protein (p.Asp326Val).
Fulgent Genetics, Fulgent Genetics RCV002506496 SCV002814539 uncertain significance Arrhythmogenic right ventricular dysplasia 10; Dilated cardiomyopathy 1BB 2021-08-17 criteria provided, single submitter clinical testing
All of Us Research Program, National Institutes of Health RCV004002655 SCV004816550 uncertain significance Arrhythmogenic right ventricular cardiomyopathy 2024-06-09 criteria provided, single submitter clinical testing This missense variant replaces aspartic acid with valine at codon 326 of the DSG2 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 been reported in an individual affected with arrhythmogenic right ventricular cardiomyopathy, who also carried a pathogenic truncation variant in the PKP2 gene that could explain the observed phenotype (PMID: 20400443). This variant has been identified in 3/280844 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.

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.