rs886039185
Variant summary
Our verdict is Pathogenic. Variant got 19 ACMG points: 19P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Very_Strong
The NM_000257.4(MYH7):c.2345G>A(p.Ser782Asn) variant causes a missense change. 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. S782R) has been classified as Likely pathogenic.
Frequency
Genomes: not found (cov: 32)
Consequence
MYH7
NM_000257.4 missense
NM_000257.4 missense
Scores
5
12
3
Clinical Significance
Conservation
PhyloP100: 6.97
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 Pathogenic. Variant got 19 ACMG points.
PM1
?
In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 10 uncertain in NM_000257.4
PM2
?
Very rare variant in population databases, with high coverage;
PM5
?
Other missense variant is known to change same aminoacid residue: Variant chr14-23425359-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 181181.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
PP2
?
Missense variant where missense usually causes diseases, MYH7
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.941
PP5
?
Variant 14-23425360-C-T is Pathogenic according to our data. Variant chr14-23425360-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 264539.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-23425360-C-T is described in Lovd as [Pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYH7 | NM_000257.4 | c.2345G>A | p.Ser782Asn | missense_variant | 21/40 | ENST00000355349.4 | |
MYH7 | NM_001407004.1 | c.2345G>A | p.Ser782Asn | missense_variant | 20/39 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYH7 | ENST00000355349.4 | c.2345G>A | p.Ser782Asn | missense_variant | 21/40 | 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/Likely pathogenic
Submissions summary: Pathogenic:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Hypertrophic cardiomyopathy Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Aug 04, 2023 | This sequence change replaces serine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 782 of the MYH7 protein (p.Ser782Asn). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with hypertrophic cardiomyopathy (PMID: 12820698, 23674513). ClinVar contains an entry for this variant (Variation ID: 264539). 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. This variant disrupts the p.Ser782 amino acid residue in MYH7. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 18533079, 23283745, 26914223, 27247418). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. - |
Cardiovascular phenotype Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Mar 25, 2022 | The p.S782N variant (also known as c.2345G>A), located in coding exon 19 of the MYH7 gene, results from a G to A substitution at nucleotide position 2345. The serine at codon 782 is replaced by asparagine, an amino acid with highly similar properties. This variant has been previously reported in individuals reported to have hypertrophic cardiomyopathy (HCM) (Rayment et al. Proc Natl Acad Sci USA. 1995;92(9):3864-8; Mohiddin et al. Genet Test. 2003;7(1):21-7; Witjas-Paalberends et al. Cardiovasc Res. 2013;99(3):432-41). 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 is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). In addition, other alterations affecting this amino acid (p.S782D (c.2344_2345delinsGA), p.S782R (c.2346C>A), and p.S782R (c.2346C>G)) have also been reported in association with HCM (Moric et al. J Appl Genet. 2003;44(1):103-9; Olivotto et al. Mayo Clin Proc. 2008;83(6):630-8; Zou et al. Mol Biol Rep. 2013;40(6):3969-76). This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the majority of available evidence to date, this variant is likely to be pathogenic. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
CardioboostCm
Uncertain
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
Cadd
Uncertain
Dann
Uncertain
DEOGEN2
Uncertain
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
Uncertain
T
PROVEAN
Uncertain
N
REVEL
Uncertain
Sift
Pathogenic
D
Sift4G
Benign
T
Polyphen
P
Vest4
MutPred
Loss of phosphorylation at S782 (P = 0.0173);
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