rs751153777

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP4BS2

The NM_002471.4(MYH6):c.3612G>C(p.Glu1204Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000126 in 1,607,924 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 1.14

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 -4 ACMG points.

PP2

Missense variant where missense usually causes diseases, MYH6

BP4

Computational evidence support a benign effect (MetaRNN=0.3073111).

BS2

High AC in GnomAd at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.3612G>C	p.Glu1204Asp	missense_variant	26/39	ENST00000405093.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH6	ENST00000405093.9 linkuse as main transcript	c.3612G>C	p.Glu1204Asp	missense_variant	26/39	5	NM_002471.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000791

AC:

AN:

151772

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000727

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:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000846

AC:

AN:

248168

Hom.:

AF XY:

0.0000744

AC XY:

AN XY:

134492

show subpopulations

Gnomad AFR exome

AF:

0.0000629

Gnomad AMR exome

AF:

0.0000870

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:

0.000153

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000131

AC:

191

AN:

1456152

Hom.:

Cov.:

AF XY:

0.000131

AC XY:

AN XY:

723798

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.0000672

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:

0.000166

Gnomad4 OTH exome

AF:

0.0000499

GnomAD4 genome

AF:

0.0000791

AC:

AN:

151772

Hom.:

Cov.:

AF XY:

0.0000540

AC XY:

AN XY:

74104

show subpopulations

Gnomad4 AFR

AF:

0.0000727

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:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000529

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

May 31, 2022

Variant summary: MYH6 c.3612G>C (p.Glu1204Asp) results in a conservative amino acid change located in the Myosin tail of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 8.5e-05 in 248168 control chromosomes. The observed variant frequency is approximately 3.38 fold of the estimated maximal expected allele frequency for a pathogenic variant in MYH6 causing Cardiomyopathy phenotype (2.5e-05), suggesting that the variant is benign. c.3612G>C has been reported in the literature in an individual who died suddenly of unexplained causes, without strong evidence for causality (Sanchez_2016). This report does not provide unequivocal conclusions about association of the variant with Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Two 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 VUS. -

Hypertrophic cardiomyopathy 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 18, 2024

This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 1204 of the MYH6 protein (p.Glu1204Asp). This variant is present in population databases (rs751153777, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with MYH6-related conditions. ClinVar contains an entry for this variant (Variation ID: 264374). 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 not expected to disrupt MYH6 protein function with a negative predictive value of 80%. 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. -

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

Sep 14, 2021

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 23, 2023

The p.E1204D variant (also known as c.3612G>C), located in coding exon 24 of the MYH6 gene, results from a G to C substitution at nucleotide position 3612. The glutamic acid at codon 1204 is replaced by aspartic acid, an amino acid with highly similar properties. This variant has been detected in an individual reported to have hypertrophic cardiomyopathy and in a sudden death case; however, details were limited and other variants in cardiac-related genes were also detected (Sanchez O et al. PLoS One, 2016 Dec;11:e0167358; van Lint FHM et al. Neth Heart J, 2019 Jun;27:304-309). This amino acid position is well conserved in available vertebrate species; however, aspartic acid is the reference amino acid in two species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.36

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Uncertain

0.63

D;D

Eigen

Benign

-0.15

Eigen_PC

Benign

-0.096

FATHMM_MKL

Benign

0.69

LIST_S2

Uncertain

0.93

D;.

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.31

T;T

MetaSVM

Uncertain

-0.17

MutationAssessor

Benign

1.2

L;L

MutationTaster

Benign

0.98

D;D

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-2.1

N;N

REVEL

Uncertain

0.40

Sift

Benign

0.038

D;D

Sift4G

Uncertain

0.044

D;D

Polyphen

0.0020

B;B

Vest4

0.41

MutPred

0.66

Gain of catalytic residue at I1209 (P = 0.0055);Gain of catalytic residue at I1209 (P = 0.0055);

MVP

0.84

MPC

1.6

ClinPred

0.039

GERP RS

3.3

Varity_R

0.17

gMVP

0.24

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