rs566368210

chr14-23420048-G-Achr14-23420048-G-T

Variant summary

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

The NM_000257.4(MYH7):c.3523C>T(p.Arg1175Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000696 in 1,579,886 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1175Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000070 ( 0 hom. )

Consequence

MYH7
NM_000257.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.25

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 3 ACMG points.

PP2

Missense variant where missense usually causes diseases, MYH7

PP3

MetaRNN computational evidence supports a deleterious effect, 0.893

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH7	NM_000257.4 linkuse as main transcript	c.3523C>T	p.Arg1175Trp	missense_variant	27/40	ENST00000355349.4
MYH7	NM_001407004.1 linkuse as main transcript	c.3523C>T	p.Arg1175Trp	missense_variant	26/39

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH7	ENST00000355349.4 linkuse as main transcript	c.3523C>T	p.Arg1175Trp	missense_variant	27/40	1	NM_000257.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151686

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:

0.000210

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000233

AC:

AN:

214750

Hom.:

AF XY:

0.0000255

AC XY:

AN XY:

117474

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:

0.000139

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000108

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000700

AC:

AN:

1428082

Hom.:

Cov.:

AF XY:

0.00000988

AC XY:

AN XY:

708240

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:

0.000107

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.17e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151804

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74166

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:

0.000210

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000254

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hypertrophic cardiomyopathy

Uncertain:2

Uncertain significance, criteria provided, single submitter	research	Agnes Ginges Centre for Molecular Cardiology, Centenary Institute	Feb 23, 2018	MYH7 Arg1175Trp has been previously reported in a childhood myopathy case (Invitae, Pers. Comm.). We identified this variant in a HCM proband with a family history of HCM (segregation not possible). The variant is present at a low frequency in the Genome Aggregation Database (MAF= 0.00002, http://gnomad.broadinstitute.org/). In silico prediction tools SIFT, PolyPhen-HCM and MutationTaster predict this variant to be deleterious. In summary, based rarity in the general population and in silico tools predicting a deleterious affect we classify MYH7 Arg1175Trp as a variant of 'uncertain significance'. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Feb 21, 2020	This sequence change replaces arginine with tryptophan at codon 1175 of the MYH7 protein (p.Arg1175Trp). The arginine residue is moderately conserved and there is a moderate physicochemical difference between arginine and tryptophan. In summary, this variant is a missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). The frequency data for this variant (rs566368210) in the population databases is unreliable, as metrics indicate poor quality at this position in the ExAC database. This variant has not been reported in the literature in individuals with a MYH7-related disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

CardioboostCm

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Pathogenic

0.27

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Pathogenic

0.91

Eigen

Uncertain

0.36

Eigen_PC

Benign

0.19

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.94

M_CAP

Pathogenic

0.94

MetaRNN

Pathogenic

0.89

MetaSVM

Pathogenic

0.85

MutationAssessor

Pathogenic

4.2

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.78

PROVEAN

Pathogenic

-5.6

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.84

MutPred

0.63

Loss of ubiquitination at K1173 (P = 0.0426);

MVP

0.97

MPC

3.4

ClinPred

0.99

GERP RS

-0.47

Varity_R

0.60

gMVP

0.99

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