Submissions for variant NM_002471.4(MYH6):c.2018G>A (p.Arg673His)

gnomAD frequency: 0.00003  dbSNP: rs1023327699

Total submissions: 3

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Victorian Clinical Genetics Services, Murdoch Childrens Research Institute	RCV002273043	SCV002557602	uncertain significance	Atrial septal defect 3	2022-03-31	criteria provided, single submitter	clinical testing	Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0105 - The mechanism of disease for this gene is not clearly established, however gain of function is suggested (PMID: 20656787). (I) 0107 - This gene is associated with autosomal dominant disease. (I) 0112 - The condition associated with this gene has incomplete penetrance, however this is only in individuals with atrial septal defect (PMID: 22194935). (I) 0115 - Variants in this gene are known to have variable expressivity, however this is only in individuals with atrial septal defect (PMID: 22194935). (I) 0200 - Variant is predicted to result in a missense amino acid change from arginine to histidine. (I) 0251 - This variant is heterozygous. (I) 0302 - Variant is present in gnomAD (v3) <0.001 for a dominant condition (5 heterozygotes, 0 homozygotes). (SP) 0501 - Missense variant consistently predicted to be damaging by multiple in silico tools or highly conserved with a major amino acid change. (SP) 0600 - Variant is located in the annotated myosin head domain (DECIPHER). (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0807 - This variant has no previous evidence of pathogenicity. (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1205 - This variant has been shown to be maternally inherited (by trio analysis). (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign
Labcorp Genetics (formerly Invitae), Labcorp	RCV005095977	SCV005768371	uncertain significance	Hypertrophic cardiomyopathy 14	2024-02-14	criteria provided, single submitter	clinical testing	This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 673 of the MYH6 protein (p.Arg673His). This variant is present in population databases (no rsID available, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with MYH6-related conditions. ClinVar contains an entry for this variant (Variation ID: 1699186). 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 MYH6 protein function with a positive 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.
PreventionGenetics, part of Exact Sciences	RCV004545273	SCV004780935	uncertain significance	MYH6-related disorder	2023-11-03	no assertion criteria provided	clinical testing	The MYH6 c.2018G>A variant is predicted to result in the amino acid substitution p.Arg673His. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0062% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/14-23866411-C-T). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence.