rs727503264
Variant summary
Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM1PM2PM5PP2PP3_ModeratePP5_Very_Strong
The NM_000257.4(MYH7):c.1969A>C(p.Lys657Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K657M) has been classified as Uncertain significance.
Frequency
Consequence
NM_000257.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 17 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYH7 | NM_000257.4 | c.1969A>C | p.Lys657Gln | missense_variant | 18/40 | ENST00000355349.4 | |
MYH7 | NM_001407004.1 | c.1969A>C | p.Lys657Gln | missense_variant | 17/39 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYH7 | ENST00000355349.4 | c.1969A>C | p.Lys657Gln | missense_variant | 18/40 | 1 | NM_000257.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome Cov.: 32
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Hypertrophic cardiomyopathy Pathogenic:2
Likely pathogenic, criteria provided, single submitter | clinical testing | Invitae | Nov 29, 2022 | This missense change has been observed in individual(s) with hypertrophic cardiomyopathy (PMID: 26337809, 27532257). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with glutamine, which is neutral and polar, at codon 657 of the MYH7 protein (p.Lys657Gln). ClinVar contains an entry for this variant (Variation ID: 164351). 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. 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. - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Nov 15, 2013 | The Lys657Gln variant in MYH7 has now been identified in 1 Caucasian adult with HCM and segregated with disease in 3 affected relatives. It has not been identi fied in large population studies. Lysine (Lys) at position 657 is highly conserv ed in mammals and across evolutionarily distant species and the change to glutam ine (Gln) was predicted to be pathogenic using a computational tool clinically v alidated by our laboratory. This tool's pathogenic prediction is estimated to be correct 94% of the time (Jordan 2011). In summary, this variant is likely to be pathogenic, though additional studies are required to fully establish its clini cal significance. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at