chr14-23402771-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PP3_ModerateBS2

The NM_002471.4(MYH6):c.928G>A(p.Asp310Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000868 in 1,612,148 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 0.000046 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 7.65

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy 14
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Laboratory for Molecular Medicine
Keppen-Lubinsky syndrome
Inheritance: AD Classification: MODERATE Submitted by: Illumina
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
atrial septal defect 3
Inheritance: AD Classification: LIMITED Submitted by: G2P
dilated cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
hypertrophic cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

MYH6 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.926

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH6	NM_002471.4 link	c.928G>A	p.Asp310Asn	missense_variant	Exon 11 of 39	ENST00000405093.9	NP_002462.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYH6	ENST00000405093.9 link	c.928G>A	p.Asp310Asn	missense_variant	Exon 11 of 39	5	NM_002471.4	ENSP00000386041.3		P13533
MYH6	ENST00000557461.2 link	n.995G>A		non_coding_transcript_exon_variant	Exon 11 of 14	5

Frequencies

GnomAD3 genomes

AF:

0.0000465

AC:

AN:

150678

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000147

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000211

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000797

AC:

AN:

250908

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461470

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727034

show subpopulations

African (AFR)

AF:

0.0000598

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44698

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53320

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1111778

Other (OTH)

AF:

0.0000166

AC:

AN:

60376

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000465

AC:

AN:

150678

Hom.:

Cov.:

AF XY:

0.0000545

AC XY:

AN XY:

73446

show subpopulations

African (AFR)

AF:

0.000147

AC:

AN:

40936

American (AMR)

AF:

0.00

AC:

AN:

15100

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5012

South Asian (SAS)

AF:

0.000211

AC:

AN:

4750

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10310

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67810

Other (OTH)

AF:

0.00

AC:

AN:

2070

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.532

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000567

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 20, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The Asp310Asn variant in MYH6 has not been reported in the literature but has be en identified in 1/4406 African American chromosomes and 1/8600 European America n chromosomes from a broad population by the NHLBI Exome Sequencing Project (htt p://evs.gs.washington.edu/EVS/). These could represent presymptomatic individual s. Computational analyses (biochemical amino acid properties, conservation, Alig nGVGD, PolyPhen2, and SIFT) do not provide strong support for or against an impa ct to the protein. Additional information is needed to fully assess the clinical significance of the Asp310Asn variant. -

Hypertrophic cardiomyopathy 14

Uncertain:1

Nov 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 310 of the MYH6 protein (p.Asp310Asn). This variant is present in population databases (rs374692396, gnomAD 0.01%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 32746448). ClinVar contains an entry for this variant (Variation ID: 44547). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) 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

Aug 09, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1

Feb 17, 2022

AiLife Diagnostics, AiLife Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Uncertain:1

Jan 17, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.D310N variant (also known as c.928G>A), located in coding exon 9 of the MYH6 gene, results from a G to A substitution at nucleotide position 928. The aspartic acid at codon 310 is replaced by asparagine, an amino acid with highly similar properties. This alteration has been reported in a pediatric cardiomyopathy cohort; however, clinical details were limited and additional alterations in other cardiac-related genes were identified (Burstein DS et al. Pediatr Res, 2021 May;89:1470-1476). This amino acid position is highly conserved in available vertebrate 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 alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.55

BayesDel_addAF

Benign

-0.021

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.76

D;D

Eigen

Uncertain

0.63

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.91

D;.

M_CAP

Pathogenic

0.36

MetaRNN

Pathogenic

0.93

D;D

MetaSVM

Uncertain

0.72

MutationAssessor

Uncertain

2.2

M;M

PhyloP100

7.6

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-4.0

D;D

REVEL

Pathogenic

0.81

Sift

Uncertain

0.0010

D;D

Sift4G

Benign

0.095

T;T

Polyphen

0.95

P;P

Vest4

0.85

MVP

0.94

MPC

0.99

ClinPred

0.97

GERP RS

4.3

Varity_R

0.63

gMVP

0.73

Mutation Taster

=10/90

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over