rs730880800
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1PM5PP2PP3_StrongPP5
The NM_000257.4(MYH7):c.4300C>T(p.Arg1434Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,460,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1434H) has been classified as Likely pathogenic.
Frequency
Consequence
NM_000257.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 10 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYH7 | NM_000257.4 | c.4300C>T | p.Arg1434Cys | missense_variant | 31/40 | ENST00000355349.4 | |
MHRT | NR_126491.1 | n.837G>A | non_coding_transcript_exon_variant | 6/6 | |||
MYH7 | NM_001407004.1 | c.4300C>T | p.Arg1434Cys | missense_variant | 30/39 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYH7 | ENST00000355349.4 | c.4300C>T | p.Arg1434Cys | missense_variant | 31/40 | 1 | NM_000257.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD4 exome AF: 0.00000411 AC: 6AN: 1460054Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1AN XY: 726336
GnomAD4 genome ? Cov.: 33
ClinVar
Submissions by phenotype
not provided Pathogenic:1Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Jun 08, 2022 | This variant has been reported in association with DCM and HCM in the published literature (PMID: 27532257) (PMID:28416588) (PMID:24119082) (PMID:2170094) (PMID:31514951); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28416588, 24119082, 21750094, 27532257, 31514951) - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Jun 14, 2023 | - - |
Hypertrophic cardiomyopathy Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Dec 20, 2023 | This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1434 of the MYH7 protein (p.Arg1434Cys). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with hypertrophic cardiomyopathy and dilated cardiomyopathy (PMID: 21750094, 24119082, 27532257; Invitae). ClinVar contains an entry for this variant (Variation ID: 181254). 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%. For these reasons, this variant has been classified as Pathogenic. - |
Cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Aug 30, 2019 | This missense variant replaces arginine with cysteine at codon 1434 of the MYH7 protein. Computational prediction tools and conservation analyses suggest that this variant may have deleterious impact on protein structure and function. Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has been reported in individuals affected with hypertrophic cardiomyopathy and dilated cardiomyopathy (PMID: 21750094, 24119082, 27532257). This variant has not been identified 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. - |
Primary dilated cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Jun 15, 2023 | - - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 18, 2023 | The p.R1434C variant (also known as c.4300C>T), located in coding exon 29 of the MYH7 gene, results from a C to T substitution at nucleotide position 4300. The arginine at codon 1434 is replaced by cysteine, an amino acid with highly dissimilar properties. This alteration has been reported in dilated cardiomyopathy (DCM) cohorts; however, clinical details were limited (Waldmüller S et al. Eur J Heart Fail, 2011 Nov;13:1185-92; Merlo M et al. Clin Transl Sci, 2013 Dec;6:424-8; Walsh R et al. Genet Med, 2017 Feb;19:192-203). 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 alteration remains unclear. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at