rs199577321

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PP2PP3_ModerateBP6

The NM_000257.4(MYH7):c.28G>C(p.Gly10Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000217 in 1,614,094 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 Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G10A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

MYH7
NM_000257.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:7

Conservation

PhyloP100: 6.16

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP2

Missense variant where missense usually causes diseases, MYH7

PP3

MetaRNN computational evidence supports a deleterious effect, 0.935

BP6

Variant 14-23433705-C-G is Benign according to our data. Variant chr14-23433705-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 177741.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=4, Likely_benign=7}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH7	NM_000257.4 linkuse as main transcript	c.28G>C	p.Gly10Arg	missense_variant	3/40	ENST00000355349.4
MYH7	NM_001407004.1 linkuse as main transcript	c.28G>C	p.Gly10Arg	missense_variant	2/39

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH7	ENST00000355349.4 linkuse as main transcript	c.28G>C	p.Gly10Arg	missense_variant	3/40	1	NM_000257.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152278

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000677

AC:

AN:

251226

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135772

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00119

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000198

AC:

AN:

1461816

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727208

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000880

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74406

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00173

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000203

Hom.:

Bravo

AF:

0.0000340

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000741

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Cardiomyopathy

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Jan 11, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Sep 23, 2019	- -
Likely benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Nov 10, 2017	- -

Dilated cardiomyopathy 1S

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Myosin storage myopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 12, 2024

The p.G10R variant (also known as c.28G>C), located in coding exon 1 of the MYH7 gene, results from a G to C substitution at nucleotide position 28. The glycine at codon 10 is replaced by arginine, an amino acid with dissimilar properties. This variant has been reported in association with hypertrophic cardiomyopathy (HCM) and pediatric cardiomyopathy; however it has also been seen in exome and healthy cohorts (Ng D et al. Circ Cardiovasc Genet, 2013 Aug;6:337-46; Walsh R et al. Genet Med, 2017 Feb;19:192-203; Harper AR et al. Nat Genet, 2021 Feb;53:135-142; Ware SM et al. Am J Hum Genet, 2022 Feb;109:282-298; Park J et al. Hum Mol Genet, 2022 Mar;31:827-837). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Hypertrophic cardiomyopathy 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 09, 2018

p.Gly10Arg in exon 3 of MYH7: This variant is not expected to have clinical sign ificance because it has been identified in 0.15% of Ashkenazi Jewish chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; d bSNP rs199577321). ACMG/AMP Criteria Applied: BS1. -

MYH7-related skeletal myopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

research

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Jun 24, 2013

- -

Hypertrophic cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.95

CardioboostCm

Uncertain

0.88

BayesDel_addAF

Pathogenic

0.28

BayesDel_noAF

Pathogenic

0.28

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Uncertain

0.61

Eigen

Pathogenic

0.72

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.99

M_CAP

Pathogenic

0.65

MetaRNN

Pathogenic

0.94

MetaSVM

Pathogenic

0.91

MutationAssessor

Pathogenic

3.3

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.77

PROVEAN

Pathogenic

-5.3

REVEL

Pathogenic

0.86

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

0.99

Vest4

0.88

MutPred

0.64

Gain of MoRF binding (P = 0.0064);

MVP

0.97

MPC

2.3

ClinPred

0.72

GERP RS

4.1

Varity_R

0.60

gMVP

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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