rs377716628

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP6BS2

The NM_002471.4(MYH6):c.3230A>T(p.Gln1077Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000613 in 1,614,180 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q1077R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2

Conservation

PhyloP100: 7.83

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

BP6

Variant 14-23392933-T-A is Benign according to our data. Variant chr14-23392933-T-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 407141.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=3, Likely_benign=2}.

BS2

High AC in GnomAd at 43 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.3230A>T	p.Gln1077Leu	missense_variant	24/39	ENST00000405093.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYH6	ENST00000405093.9 linkuse as main transcript	c.3230A>T	p.Gln1077Leu	missense_variant	24/39	5	NM_002471.4	P1

Frequencies

GnomAD3 genomes

AF:

0.000282

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000123

AC:

AN:

251454

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135900

show subpopulations

Gnomad AFR exome

AF:

0.00148

Gnomad AMR exome

AF:

0.000116

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:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461822

Hom.:

Cov.:

AF XY:

0.0000385

AC XY:

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.00122

Gnomad4 AMR exome

AF:

0.000112

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.000282

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74508

show subpopulations

Gnomad4 AFR

AF:

0.00103

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000113

Hom.:

Bravo

AF:

0.000344

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000107

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Atrial septal defect 3

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 27, 2018	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Johns Hopkins Genomics, Johns Hopkins University	Dec 07, 2022	This MYH6 variant (rs377716628) has been identified in a large population dataset and the minor allele frequency is neither low enough to consider the variant rare (<0.1%) nor high enough to consider it a population polymorphism (>1%) within the African/African American subpopulation (gnomAD: 32/24972 alleles; 0.13%, no homozygotes). This patient's ethnicity is reported to be Brazilian. This variant has been previously reported to ClinVar. Two bioinformatic tools queried predict that this substitution would be damaging, and the glutamine residue at this position is strongly conserved across the vertebrate species assessed. Bioinformatic analysis predicts that this missense variant would not affect normal exon 24 splicing, although this has not been confirmed experimentally to our knowledge. Due to insufficient evidence that this variant is deleterious, we consider the clinical significance of c.3230A>T (p.Gln1077Leu) to be uncertain at this time. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 11, 2022

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function -

Hypertrophic cardiomyopathy 14

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Nov 03, 2023

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 22, 2022

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

0.020

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.72

D;D

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.80

T;.

M_CAP

Pathogenic

0.43

MetaRNN

Uncertain

0.47

T;T

MetaSVM

Uncertain

0.62

MutationAssessor

Pathogenic

3.2

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.76

PROVEAN

Pathogenic

-5.4

D;D

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;D

Sift4G

Uncertain

0.014

D;D

Polyphen

1.0

D;D

Vest4

0.67

MVP

0.92

MPC

1.1

ClinPred

0.21

GERP RS

4.8

Varity_R

0.75

gMVP

0.52

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