rs727503268
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PP2PP3_Strong
The NM_000257.4(MYH7):c.1166G>A(p.Gly389Glu) variant causes a missense change involving the alteration of a non-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 Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
MYH7
NM_000257.4 missense
NM_000257.4 missense
Scores
12
7
1
Clinical Significance
Conservation
PhyloP100: 3.20
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 9 ACMG points.
PM1
?
In a hotspot region, there are 11 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 12 uncertain in NM_000257.4
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, MYH7
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.945
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYH7 | NM_000257.4 | c.1166G>A | p.Gly389Glu | missense_variant | 13/40 | ENST00000355349.4 | |
MYH7 | NM_001407004.1 | c.1166G>A | p.Gly389Glu | missense_variant | 12/39 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYH7 | ENST00000355349.4 | c.1166G>A | p.Gly389Glu | missense_variant | 13/40 | 1 | NM_000257.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0AN: 1461890Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0AN XY: 727246
GnomAD4 exome
Data not reliable, filtered out with message: AC0;AS_VQSR
AF:
AC:
0
AN:
1461890
Hom.:
Cov.:
34
AF XY:
AC XY:
0
AN XY:
727246
Gnomad4 AFR exome
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GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:1Uncertain:3
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | GeneDx | Jan 21, 2022 | Observed in individuals with HCM in published literature (Walsh et al., 2017; Hathaway et al., 2021) and patients referred for genetic testing at GeneDx; 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: 27532257, 29300372, 33673806) - |
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Feb 15, 2013 | proposed classification - variant undergoing re-assessment, contact laboratory - |
Hypertrophic cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Sep 10, 2022 | This variant is not present in population databases (gnomAD no frequency). 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. 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. ClinVar contains an entry for this variant (Variation ID: 164377). This missense change has been observed in individual(s) with hypertrophic cardiomyopathy (PMID: 27532257, 33673806). This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 389 of the MYH7 protein (p.Gly389Glu). - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jun 16, 2022 | The p.G389E variant (also known as c.1166G>A), located in coding exon 11 of the MYH7 gene, results from a G to A substitution at nucleotide position 1166. The glycine at codon 389 is replaced by glutamic acid, an amino acid with similar properties. This alteration is located in the myosin head domain, which contains a statistically significant clustering of pathogenic missense variants (Homburger JR et al. Proc Natl Acad Sci U S A, 2016 06;113:6701-6; Walsh R et al. Genet Med, 2017 02;19:192-203; Ambry internal data). This variant has been detected in hypertrophic cardiomyopathy (HCM) cohorts; however, clinical details were limited (Walsh R et al. Genet. Med., 2017 Feb;19:192-203; Atiga WL et al. Circulation. 2000 Mar;101(11):1237-42). 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:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
CardioboostCm
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Pathogenic
D
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Pathogenic
D
MutationAssessor
Uncertain
M
MutationTaster
Benign
D
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Uncertain
D
Sift4G
Pathogenic
D
Polyphen
D
Vest4
MutPred
Gain of disorder (P = 0.0746);
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