chr14-23386446-G-A

Position:

chr14-23386446-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PP2PP3_ModerateBS2

The NM_002471.4(MYH6):c.4828C>T(p.Arg1610Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000384 in 1,614,010 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 0.000079 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:8

Conservation

PhyloP100: 1.40

Variant links:

Genes affected

MYH6 (HGNC:7576): (myosin heavy chain 6) Cardiac muscle myosin is a hexamer consisting of two heavy chain subunits, two light chain subunits, and two regulatory subunits. This gene encodes the alpha heavy chain subunit of cardiac myosin. The gene is located approximately 4kb downstream of the gene encoding the beta heavy chain subunit of cardiac myosin. Mutations in this gene cause familial hypertrophic cardiomyopathy and atrial septal defect 3. [provided by RefSeq, Feb 2017]

MYH6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH6. . Gene score misZ 0.85843 (greater than the threshold 3.09). Trascript score misZ 4.1282 (greater than threshold 3.09). GenCC has associacion of gene with dilated cardiomyopathy, hypertrophic cardiomyopathy, Keppen-Lubinsky syndrome, atrial septal defect 3, familial isolated dilated cardiomyopathy, hypertrophic cardiomyopathy 14.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.883

BS2

High AC in GnomAd4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.4828C>T	p.Arg1610Cys	missense_variant	33/39	ENST00000405093.9	NP_002462.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH6	ENST00000405093.9 linkuse as main transcript	c.4828C>T	p.Arg1610Cys	missense_variant	33/39	5	NM_002471.4	ENSP00000386041	P1

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251490

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135918

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000439

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000225

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000789

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74298

show subpopulations

Gnomad4 AFR

AF:

0.000121

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:

0.000103

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Sep 08, 2021	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 24, 2015

The p.Arg1610Cys variant in MYH6 has not been previously reported in individuals with cardiomyopathy, but has been identified in 2/66740 European American chrom osomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org ). Arginine (Arg) at position 1610 is not conserved in evolution and 1 mammal (m anatee) carries a cysteine (Cys) at this position, raising the possibility that this change may be tolerated. However, additional computational prediction tools suggest that the p.Arg1610Cys variant may impact the protein, though this infor mation is not predictive enough to determine pathogenicity. In summary, the clin ical significance of the p.Arg1610Cys variant is uncertain. -

Hypertrophic cardiomyopathy 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 11, 2023

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. 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 MYH6 protein function. ClinVar contains an entry for this variant (Variation ID: 228895). This missense change has been observed in individual(s) with congenital heart disease, dilated cardiomyopathy, or left ventricular noncompaction (PMID: 28991257, 30471092, 32746448). This variant is present in population databases (rs780726611, gnomAD 0.005%). This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 1610 of the MYH6 protein (p.Arg1610Cys). -

Dilated cardiomyopathy 1EE;C2750467:Hypertrophic cardiomyopathy 14;C3279790:Atrial septal defect 3;C3279791:Sick sinus syndrome 3, susceptibility to;C3495498:Hypertrophic cardiomyopathy 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 04, 2021

- -

MYH6-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 18, 2024

The MYH6 c.4828C>T variant is predicted to result in the amino acid substitution p.Arg1610Cys. This variant was reported in the homozygous state in an individual with atrial and ventricular septal defects (Patient 1-07343 in Tables S1 and S3, Jin et al. 2017. PubMed ID: 28991257). This variant was also documented in individuals with dilated cardiomyopathy and left ventricular noncompaction (Table S2, Richard et al. 2019. PubMed ID: 30471092; Table S2, Cambon-Viala et al. 2021. PubMed ID: 34088380; Table S2, Burstein et al. 2021. PubMed ID: 32746448). However, no additional studies were performed to help assess the pathogenicity of this variant. This variant is reported in 0.0050% of alleles in individuals of East Asian descent in gnomAD and is interpreted as uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/228895/). 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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 07, 2022

The p.R1610C variant (also known as c.4828C>T), located in coding exon 31 of the MYH6 gene, results from a C to T substitution at nucleotide position 4828. The arginine at codon 1610 is replaced by cysteine, an amino acid with highly dissimilar properties. This variant was reported in a congenital heart defect exome cohort, in one individual who had atrial and septal cardiac defects (Jin SC et al. Nat. Genet., 2017 Nov;49:1593-1601). This amino acid position is highly 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.34

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.80

D;D

Eigen

Pathogenic

0.72

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.90

LIST_S2

Pathogenic

0.99

D;.

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.88

D;D

MetaSVM

Uncertain

0.72

MutationAssessor

Pathogenic

3.5

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.83

PROVEAN

Pathogenic

-5.4

D;D

REVEL

Pathogenic

0.87

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.87

MutPred

0.59

Loss of MoRF binding (P = 0.0284);Loss of MoRF binding (P = 0.0284);

MVP

0.95

MPC

1.1

ClinPred

0.92

GERP RS

4.4

Varity_R

0.48

gMVP

0.71

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