14-23424854-T-C

Position:

chr14-23424854-T-C

Variant summary

Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PM1PM2PP2PP3_ModeratePP5_Very_Strong

The NM_000257.4(MYH7):c.2594A>G(p.Lys865Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,614,124 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 Likely pathogenic (★★).

Frequency

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

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

MYH7
NM_000257.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 6.01

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 Pathogenic. Variant got 15 ACMG points.

PM1

In a helix (size 120) in uniprot entity MYH7_HUMAN there are 91 pathogenic changes around while only 3 benign (97%) in NM_000257.4

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH7. . Gene score misZ 3.9329 (greater than the threshold 3.09). Trascript score misZ 6.7889 (greater than threshold 3.09). GenCC has associacion of gene with 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, 0.898

PP5

Variant 14-23424854-T-C is Pathogenic according to our data. Variant chr14-23424854-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 524996.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-23424854-T-C is described in Lovd as [Pathogenic]. Variant chr14-23424854-T-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH7	NM_000257.4 linkuse as main transcript	c.2594A>G	p.Lys865Arg	missense_variant	22/40	ENST00000355349.4	NP_000248.2
MYH7	NM_001407004.1 linkuse as main transcript	c.2594A>G	p.Lys865Arg	missense_variant	21/39		NP_001393933.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH7	ENST00000355349.4 linkuse as main transcript	c.2594A>G	p.Lys865Arg	missense_variant	22/40	1	NM_000257.4	ENSP00000347507	P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152232

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:

0.00000398

AC:

AN:

251464

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135914

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727246

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74370

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

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Nov 22, 2021

- -

Primary dilated cardiomyopathy

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Nov 08, 2023

The c.2594A>G (p.Lys865Arg) variant in the MYH7 gene has been identified in at least four individuals with Hypertrophic Cardiomyopathy (HCM) (PMID:16858239, 18533079, 21835320, 25524337, 32228044) and two individuals with dilated cardiomyopathy (PMID: 32880476, 34194005). This variant lies in the established functional domain (amino acids 181-937) of the MYH7 protein without benign variations, and missense variants in this region are statistically more likely to be disease-associated (PMID:27532257). In-silico computational prediction tools suggest that this variant may have deleterious effect on the protein function (REVEL score: 0.746). This variant is found to be rare (1/251464; 0.000397%) in the general population database (gnomAD) and interpreted as likely pathogenic/pathogenic by multiple submitters in the ClinVar database (ClinVar ID: 524996). Other missense changes affecting the same amino acid, c.2593A>G (p.Lys865Glu) and c.2594A>T (p.Lys865Met), have been reported in individuals with hypertrophic cardiomyopathy (PMID:27247418, 32894683, 24793961) and interpreted as likely pathogenic by several ClinVar submitters in the ClinVar database (ClinVar ID:181195, 454358), including the ClinGen Cardiomyopathy Variant Curation Expert Panel (ClinVar ID:181195). Therefore, the c.2594A>G (p.Lys865Arg) variant in the MYH7 gene is classified as likely pathogenic. -

Hypertrophic cardiomyopathy

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 19, 2022

This variant disrupts the p.Lys865 amino acid residue in MYH7. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 21310275, 24793961, 27532257). 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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 524996). This missense change has been observed in individuals with hypertrophic cardiomyopathy (PMID: 16858239, 27247418). This variant is present in population databases (rs758891557, gnomAD 0.0009%). This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 865 of the MYH7 protein (p.Lys865Arg). -

Hypertrophic cardiomyopathy 1

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

MGZ Medical Genetics Center

Feb 10, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

CardioboostCm

Pathogenic

0.93

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.050

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.66

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.88

M_CAP

Pathogenic

0.56

MetaRNN

Pathogenic

0.90

MetaSVM

Uncertain

0.42

MutationAssessor

Uncertain

2.4

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-1.8

REVEL

Pathogenic

0.75

Sift

Benign

0.13

Sift4G

Benign

0.17

Polyphen

1.0

Vest4

0.84

MutPred

0.71

Loss of ubiquitination at K865 (P = 0.0074);

MVP

0.95

MPC

1.9

ClinPred

0.93

GERP RS

4.7

Varity_R

0.30

gMVP

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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