ClinVar Miner

Submissions for variant NM_000257.4(MYH7):c.1220G>T (p.Gly407Val)

dbSNP: rs397516095
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine RCV000465369 SCV000059360 likely pathogenic Hypertrophic cardiomyopathy 2018-04-06 criteria provided, single submitter clinical testing The p.Gly407Val variant in MYH7 has been identified in 2 individuals with HCM (V an Driest 2004, LMM data) and was absent from large population studies. This var iant has also been reported in ClinVar (Variation ID #42831). Computational pred iction tools and conservation analysis suggest that the p.Gly407Val variant may impact the protein, though this information is not predictive enough to determin e pathogenicity. Of note, this variant lies in the head region of the protein. M issense variants in this region have been reported and statistically indicated t o be more likely to cause disease (Walsh 2016). In summary, although additional studies are required to fully establish its clinical significance, the p.Gly407V al variant is likely pathogenic. ACMG/AMP Criteria applied: PM1; PM2; PP3; PS4_S upporting.
Invitae RCV000465369 SCV000546216 likely pathogenic Hypertrophic cardiomyopathy 2022-07-21 criteria provided, single submitter clinical testing ClinVar contains an entry for this variant (Variation ID: 42831). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant is found within a region of MYH7 between codons 181 and 937 that contains the majority of the myosin head domain. Missense variants in this region have been shown to be significantly overrepresented in individuals with hypertrophic cardiomyopathy (PMID: 27532257). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This missense change has been observed in individual(s) with ‚Äãhypertrophic cardiomyopathy (PMID: 15358028, 27532257). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 407 of the MYH7 protein (p.Gly407Val).
Ambry Genetics RCV002362622 SCV002657969 likely pathogenic Cardiovascular phenotype 2020-01-08 criteria provided, single submitter clinical testing The p.G407V variant (also known as c.1220G>T), located in coding exon 11 of the MYH7 gene, results from a G to T substitution at nucleotide position 1220. The glycine at codon 407 is replaced by valine, an amino acid with dissimilar properties, and is located in the head domain. This variant has been detected in hypertrophic cardiomyopathy (HCM) cohorts; however, detail was limited (Van Driest SL et al. J. Am. Coll. Cardiol., 2004 Aug;44:602-10; Walsh R et al. Genet. Med., 2017 02;19:192-203). Based on internal structural analysis, this variant is anticipated to be structurally disruptive (Planelles-Herrero VJ. Nat Commun. 2017 08;8(1):190). A likely pathogenic variant affecting the same codon (p.G407C, c.1219G>T) has been reported in association with HCM (Guo Q et al. DNA Cell Biol., 2014 Oct;33:699-704). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the majority of available evidence to date, this variant is likely to be pathogenic.

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