rs750987717

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PP2PP3_Moderate

The NM_000257.4(MYH7):c.4717G>A(p.Glu1573Lys) variant causes a missense change. The variant allele was found at a frequency of 0.0000539 in 1,613,820 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000059 ( 0 hom. )

Consequence

MYH7
NM_000257.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:14

Conservation

PhyloP100: 5.73

Variant links:

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]

MYH7 links:

MHRT (HGNC:51291): (myosin heavy chain associated RNA transcript) This gene encodes a spliced long non-coding RNA that may act as a cardioprotective agent in the heart. Based on a study of a similar gene in mouse, the encoded transcript may regulate chromatin remodeling by acting as a decoy to the BRG1 chromatin repressor complex thus preventing it from binding to its genomic targets. Blocking the actions of BRG1 could be crucial in protecting the heart from pathological hypertrophy. [provided by RefSeq, Dec 2014]

MHRT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PP2

Missense variant in the MYH7 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 341 curated pathogenic missense variants (we use a threshold of 10). The gene has 16 curated benign missense variants. Gene score misZ: 3.9329 (above the threshold of 3.09). Trascript score misZ: 6.7889 (above the threshold of 3.09). GenCC associations: The gene is linked to hyaline body myopathy, MYH7-related skeletal myopathy, dilated cardiomyopathy 1S, congenital myopathy 7A, myosin storage, autosomal dominant, dilated cardiomyopathy, left ventricular noncompaction, myopathy, myosin storage, autosomal dominant, hypertrophic cardiomyopathy, congenital heart disease, Ebstein anomaly, arrhythmogenic right ventricular cardiomyopathy, myopathy, myosin storage, autosomal recessive, hypertrophic cardiomyopathy 1, familial isolated dilated cardiomyopathy.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.909

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH7	NM_000257.4 link	c.4717G>A	p.Glu1573Lys	missense_variant	Exon 34 of 40	ENST00000355349.4	NP_000248.2	P12883
MYH7	NM_001407004.1 link	c.4717G>A	p.Glu1573Lys	missense_variant	Exon 33 of 39		NP_001393933.1
MHRT	NR_126491.1 link	n.501C>T		non_coding_transcript_exon_variant	Exon 3 of 6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYH7	ENST00000355349.4 link	c.4717G>A	p.Glu1573Lys	missense_variant	Exon 34 of 40	1	NM_000257.4	ENSP00000347507.3		P12883

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152006

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000597

AC:

AN:

251370

Hom.:

AF XY:

0.0000810

AC XY:

AN XY:

135850

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.0000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000588

AC:

AN:

1461814

Hom.:

Cov.:

AF XY:

0.0000646

AC XY:

AN XY:

727190

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000562

Gnomad4 NFE exome

AF:

0.0000701

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152006

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74242

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000697

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:14

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:5

May 01, 2018

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Sep 05, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Identified in an individual affected with cardiac defects and in an unaffected relative, as well as in an individual with left ventricular noncompation in the published literature (Postma et al., 2011; Miszalski-Jamka et al., 2017); Reported in a patient with HCM referred for genetic testing at GeneDx who harbored an additional pathogenic variant that may explain their phenotype; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 222729; ClinVar); This variant is associated with the following publications: (PMID: 21127202, 32880476, 28798025, 34542152, Vepslinen2022[CaseReport]) -

Clinical Genetics, Academic Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not specified

Uncertain:2

Oct 17, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MYH7 c.4717G>A (p.Glu1573Lys) results in a conservative amino acid change in the encoded protein sequence within the Myosin tail (IPR002928). Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 6e-05 in 251370 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in MYH7 causing Cardiomyopathy (6e-05 vs 0.0013), allowing no conclusion about variant significance. c.4717G>A has been reported in the literature in individuals affected with Cardiomyopathy, Left ventricular hypertrabeculation, and Ebstein's anomaly (Jamka_2017, Verdonschot_2020, Postma_2011, Haas_2015). These reports do not provide unequivocal conclusions about association of the variant with Cardiomyopathy. Co-occurrences with another pathogenic variant has been reported (MYH7 c.2167C>T, p.Arg723Gly, internal data), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Jul 26, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Reported in 1 proband with ebstein anomaly and mild hypertrabeculation of the apex, but also identified in her father with normal echo; ClinVar: VUS for first degree atrioventricular block -

Cardiomyopathy

Uncertain:2

Jun 09, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glutamic acid with lysine at codon 1573 of the MYH7 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with left ventricular non-compaction (PMID: 28798025) and in an individual with dilated cardiomyopathy (PMID: 32880476). This variant has also been reported in an individual affected with Ebstein anomaly and perimembranous ventricular septal defect, as well as in the unaffected father (PMID: 21127202). This variant has been identified in 15/251370 chromosomes 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. -

Dec 09, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Dilated cardiomyopathy 1S

Uncertain:1

Feb 02, 2022

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0105 - The mechanism of disease for this gene is not clearly established, however, missense variants have been proposed to act in a dominant negative manner (PMID: 24714796). (I) 0108 - This gene is associated with both recessive and dominant disease. Pathogenic variants in this gene are usually heterozygous, however a recessive inheritance pattern has been observed in severe cases (OMIM). (I) 0112 - The condition associated with this gene has incomplete penetrance (PMID: 29300372). (I) 0200 - Variant is predicted to result in a missense amino acid change from glutamic acid to lysine. (I) 0251 - This variant is heterozygous. (I) 0302 - Variant is present in gnomAD (v2) <0.001 for a dominant condition (15 heterozygotes, 0 homozygotes). (SP) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0600 - Variant is located in the annotated part of skip three of the light meromyosin region (PMID: 26150528). (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0809 - Previous evidence of pathogenicity for this variant is inconclusive. This variant has been reported multiple times as a VUS and has been observed in individuals with hypertrophic cardiomyopathy, left ventricular non-compaction cardiomyopathy, and dilated cardiomyopathy (ClinVar, PMID: 30847666, PMID: 28798025, PMID: 21127202, VCGS). This variant has also been reported in an Ebstein anomaly proband and her unaffected father (PMID: 21127202). Additionally, this variant was identified in a HCM proband referred for genetic testing at GeneDx who had an additional pathogenic variant that may explain their phenotype (ClinVar). (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Hypertrophic cardiomyopathy

Uncertain:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 1573 of the MYH7 protein (p.Glu1573Lys). This variant is present in population databases (rs750987717, gnomAD 0.01%). This missense change has been observed in individual(s) with MYH7-related conditions (PMID: 21127202, 28798025, 32880476). ClinVar contains an entry for this variant (Variation ID: 222729). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt MYH7 protein function with a positive predictive value of 95%. 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. -

MYH7-related disorder

Uncertain:1

Jun 30, 2023

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The MYH7 c.4717G>A variant is predicted to result in the amino acid substitution p.Glu1573Lys. This variant was reported in individuals with Ebstein anomaly, left ventricular noncompaction, or dilated cardiomyopathy (Postma et al. 2011. PubMed ID: 21127202; Table S6, Haas et al. 2014. PubMed ID: 25163546; Table S3, Miszalski-Jamka et al. 2017. PubMed ID: 28798025; Table S4, Verdonschot et al. 2020. PubMed ID: 32880476). However, this variant was also documented in unaffected family members or control individuals (Postma et al. 2011. PubMed ID: 21127202; Table S6, Park et al. 2022. PubMed ID: 34542152). This variant is reported in 0.014% of alleles in individuals of European (Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/14-23885449-C-T). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Cardiovascular phenotype

Uncertain:1

Dec 13, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.E1573K variant (also known as c.4717G>A), located in coding exon 32 of the MYH7 gene, results from a G to A substitution at nucleotide position 4717. The glutamic acid at codon 1573 is replaced by lysine, an amino acid with similar properties. This variant was detected in a proband with Ebstein's anomaly, mild apical hypertrabeculation and VSD, but was also detected in an unaffected parent (Postma AV et al. Circ Cardiovasc Genet, 2011 Feb;4:43-50). This variant has also been detected in a case reported to have left ventricular non-compaction, a case with dilated cardiomyopathy, and in a hypertrophic cardiomyopathy cohort; however, details were limited and additional variants in cardiac-related genes were also detected in some cases (Miszalski-Jamka K et al. Circ Cardiovasc Genet, 2017 Aug;10; Verdonschot JAJ et al. Circ Genom Precis Med, 2020 Oct;13:476-487; Harper AR et al. Nat Genet, 2021 Feb;53:135-142). This variant has also been detected in three individuals from an exome sequencing cohort who were not known to have cardiomyopathy or skeletal myopathy (Park J et al. Hum Mol Genet, 2022 Mar;31:827-837). This amino acid position is well 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. -

First degree atrioventricular block

Uncertain:1

Aug 27, 2015

Blueprint Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

CardioboostCm

Pathogenic

0.95

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Pathogenic

0.19

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.83

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

M_CAP

Pathogenic

0.93

MetaRNN

Pathogenic

0.91

MetaSVM

Uncertain

0.51

MutationAssessor

Pathogenic

3.6

PrimateAI

Pathogenic

0.79

PROVEAN

Uncertain

-2.5

REVEL

Pathogenic

0.77

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0050

Polyphen

0.85

Vest4

0.87

MVP

0.91

MPC

1.5

ClinPred

0.71

GERP RS

4.5

Varity_R

0.61

gMVP

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over