rs878853842
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PP2PP5_Moderate
The NM_000257.4(MYH7):c.761C>A(p.Ala254Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 32)
Consequence
MYH7
NM_000257.4 missense
NM_000257.4 missense
Scores
3
8
9
Clinical Significance
Conservation
PhyloP100: 7.86
Genes affected
MYH7 (HGNC:7577): (myosin heavy chain 7) Muscle myosin is a hexameric protein containing 2 heavy chain subunits, 2 alkali light chain subunits, and 2 regulatory light chain subunits. This gene encodes the beta (or slow) heavy chain subunit of cardiac myosin. It is expressed predominantly in normal human ventricle. It is also expressed in skeletal muscle tissues rich in slow-twitch type I muscle fibers. Changes in the relative abundance of this protein and the alpha (or fast) heavy subunit of cardiac myosin correlate with the contractile velocity of cardiac muscle. Its expression is also altered during thyroid hormone depletion and hemodynamic overloading. Mutations in this gene are associated with familial hypertrophic cardiomyopathy, myosin storage myopathy, dilated cardiomyopathy, and Laing distal myopathy. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 13 uncertain in NM_000257.4
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, MYH7
PP5
?
Variant 14-23431453-G-T is Pathogenic according to our data. Variant chr14-23431453-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 237444.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYH7 | NM_000257.4 | c.761C>A | p.Ala254Glu | missense_variant | 9/40 | ENST00000355349.4 | |
MYH7 | NM_001407004.1 | c.761C>A | p.Ala254Glu | missense_variant | 8/39 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYH7 | ENST00000355349.4 | c.761C>A | p.Ala254Glu | missense_variant | 9/40 | 1 | NM_000257.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 33
GnomAD4 exome
Cov.:
33
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hypertrophic cardiomyopathy Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Nov 23, 2016 | Family studies have indicated that this variant was not present in the parents of an individual with hypertrophic cardiomyopathy, which suggests that it was de novo in that affected individual (Invitae). This sequence change replaces alanine with glutamic acid at codon 254 of the MYH7 protein (p.Ala254Glu). The alanine residue is highly conserved and there is a moderate physicochemical difference between alanine and glutamic acid. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a MYH7-related disease. For these reasons, this variant has been classified as 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). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
CardioboostCm
Uncertain
BayesDel_addAF
Uncertain
D
BayesDel_noAF
Benign
Cadd
Uncertain
Dann
Benign
DEOGEN2
Uncertain
D
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D
MetaSVM
Uncertain
T
MutationAssessor
Benign
N
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Benign
N
REVEL
Uncertain
Sift
Benign
D
Sift4G
Benign
T
Polyphen
B
Vest4
MutPred
Gain of catalytic residue at R249 (P = 6e-04);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at