ClinVar

Description

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1359 of the MYH7 protein (p.Arg1359Cys). This variant is present in population databases (rs45451303, gnomAD 0.01%). This missense change has been observed in individuals with dilated cardiomyopathy, hypertrophic cardiomyopathy, and/or left ventricular noncompaction (PMID: 18506004, 19412328, 20965760, 28790153; Invitae). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 178082). 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 MYH7 protein function with a positive predictive value of 95%. This variant disrupts the p.Arg1359 amino acid residue in MYH7. Other variant(s) that disrupt this residue have been observed in individuals with MYH7-related conditions (Invitae), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic.