chr14-23383292-C-T

Position:

chr14-23383292-C-T

Variant summary

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

The NM_002471.4(MYH6):c.5594G>A(p.Arg1865Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000921 in 1,324,786 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. R1865W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000041 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000097 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 7.88

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, 0.859

BS2

High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.5594G>A	p.Arg1865Gln	missense_variant	37/39	ENST00000405093.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH6	ENST00000405093.9 linkuse as main transcript	c.5594G>A	p.Arg1865Gln	missense_variant	37/39	5	NM_002471.4	P1
MYH6	ENST00000651452.1 linkuse as main transcript	n.821G>A		non_coding_transcript_exon_variant	1/3

Frequencies

GnomAD3 genomes

AF:

0.0000406

AC:

AN:

123126

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:

0.0000798

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000677

AC:

AN:

251182

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135782

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000115

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000974

AC:

117

AN:

1201660

Hom.:

Cov.:

AF XY:

0.0000891

AC XY:

AN XY:

594836

show subpopulations

Gnomad4 AFR exome

AF:

0.0000757

Gnomad4 AMR exome

AF:

0.0000535

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000173

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000115

Gnomad4 OTH exome

AF:

0.0000458

GnomAD4 genome

AF:

0.0000406

AC:

AN:

123126

Hom.:

Cov.:

AF XY:

0.0000175

AC XY:

AN XY:

57194

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:

0.0000798

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000279

Hom.:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000576

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000296

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hypertrophic cardiomyopathy 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 21, 2023

This variant is present in population databases (rs138720701, gnomAD 0.01%). This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1865 of the MYH6 protein (p.Arg1865Gln). This missense change has been observed in individual(s) with congenital heart defects (PMID: 20656787). 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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 520531). -

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 16, 2021

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Mar 13, 2024

Identified in a patient with hypertrophic cardiomyopathy (HCM) who harbored an additional cardiogenetic variant and in a patient with secundum atrial septal defect (PMID: 23396983, 20656787); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 25351510, 20656787, 29762087, 35621855, 22955375, 29687901, 23396983) -

MYH6-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 20, 2023

The MYH6 c.5594G>A variant is predicted to result in the amino acid substitution p.Arg1865Gln. This variant was reported in an individual with hypertrophic cardiomyopathy (Table S1, Lopes et al. 2013. PubMed ID: 23396983). This variant was also reported in a family with a wide spectrum of congenital heart defects, including atrial septal defect, ventricular septal defect, and dilated inferior vena cava. However, this variant was also identified in an unaffected family member (Granados-Riveron et al. 2010. PubMed ID: 20656787). This variant is reported in 0.011% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Primary familial hypertrophic cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Aug 30, 2016

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 18, 2018

The p.R1865Q variant (also known as c.5594G>A), located in coding exon 35 of the MYH6 gene, results from a G to A substitution at nucleotide position 5594. The arginine at codon 1865 is replaced by glutamine, an amino acid with highly similar properties. This alteration was detected in an individual with a secundum atrial septal defect, as well as in his mother with dilated inferior vena cava, in his brother with a small ventricular septal defect that closed spontaneously, and in his unaffected sister; of note, MYH6 was the only gene tested in this family (Granados-Riveron JT et al. Hum. Mol. Genet., 2010 Oct;19:4007-16). This alteration has also been reported in a hypertrophic cardiomyopathy (HCM) cohort; however, clinical details were limited (Lopes LR et al. Heart, 2015 Feb;101:294-301). 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

0.45

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.66

D;D

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;.

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.86

D;D

MetaSVM

Uncertain

0.36

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.68

PROVEAN

Uncertain

-2.6

D;D

REVEL

Pathogenic

0.78

Sift

Pathogenic

0.0

D;D

Sift4G

Benign

0.41

T;T

Polyphen

0.99

D;D

Vest4

0.91

MVP

0.80

MPC

0.91

ClinPred

0.47

GERP RS

4.5

Varity_R

0.47

gMVP

0.46

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