ClinVar

Description

Variant summary: VCL c.829C>A (p.Leu277Met) results in a conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00011 in 251860 control chromosomes. The observed variant frequency is approximately 4.3 fold of the estimated maximal expected allele frequency for a pathogenic variant in VCL causing Cardiomyopathy phenotype (2.5e-05), strongly suggesting that the variant is benign. c.829C>A has been reported in the literature in at-least one individual with hypertrophic cardiomyopathy (HCM) and continues to be reported as a VUS in settings of multigene panel testing among cohorts of affected individuals with dilated cardiomyopathy (DCM), sudden cardiac death (SCD) and HCM (example, Vasile_2006, Pugh_2014, Sanchez_2016, Mazzarotto_2019, Robyns_2020). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign.