14-23390170-C-T

Position:

chr14-23390170-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.3619G>A(p.Glu1207Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000877 in 1,608,330 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 0.000059 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000091 ( 0 hom. )

Consequence

MYH6
NM_002471.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 7.56

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, 0.913

BS2

High AC in GnomAd4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.3619G>A	p.Glu1207Lys	missense_variant	26/39	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.3619G>A	p.Glu1207Lys	missense_variant	26/39	5	NM_002471.4	ENSP00000386041	P1

Frequencies

GnomAD3 genomes

AF:

0.0000593

AC:

AN:

151680

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000485

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:

0.0000842

AC:

AN:

249396

Hom.:

AF XY:

0.0000963

AC XY:

AN XY:

134966

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000927

Gnomad NFE exome

AF:

0.000161

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000906

AC:

132

AN:

1456650

Hom.:

Cov.:

AF XY:

0.000102

AC XY:

AN XY:

724152

show subpopulations

Gnomad4 AFR exome

AF:

0.0000599

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000750

Gnomad4 NFE exome

AF:

0.000109

Gnomad4 OTH exome

AF:

0.0000333

GnomAD4 genome

AF:

0.0000593

AC:

AN:

151680

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74048

show subpopulations

Gnomad4 AFR

AF:

0.0000485

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:

0.0000480

Hom.:

ExAC

AF:

0.0000906

AC:

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, criteria provided, single submitter	clinical testing	AiLife Diagnostics, AiLife Diagnostics	Jun 28, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 12, 2023	Has been reported in individuals with hypoplastic left heart syndrome and cardiomyopathy (PMID: 26085007, 30847666, 35026164); 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: 33432820, 35026164, 35621855, 33949037, 30847666, 26085007) -
Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Jan 31, 2020	The MYH6 c.3619G>A; p.Glu1207Lys variant (rs397516762) is reported in the literature in an individual affected with hypoplastic left heart (Theis 2015). This variant is found in the non-Finnish European population with an overall allele frequency of 0.01% (19/127454 alleles) in the Genome Aggregation Database. The glutamate at codon 1207 is highly conserved, and computational analyses (SIFT, PolyPhen-2) predict that this variant is deleterious. However, due to limited information, the clinical significance of the p.Glu1207Lys variant is uncertain at this time. References: Theis JL et al. Recessive MYH6 Mutations in Hypoplastic Left Heart With Reduced Ejection Fraction. Circ Cardiovasc Genet. 2015 Aug;8(4):564-71. -

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Apr 27, 2016	The p.Glu1207Lys variant in MYH6 has been reported in the literature in 1 indivi dual with hypoplastic left heart (Theis 2015) and has been observed by our labor atory in 1 individual with HCM. This variant has been identified in 11/63888 Eur opean chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadin stitute.org; dbSNP rs397516762). Computational prediction tools and conservation analysis suggest that the p.Glu1207Lys variant may impact the protein, though t his information is not predictive enough to determine pathogenicity. In summary, the clinical significance of the p.Glu1207Lys variant is uncertain. -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jun 16, 2022	Variant summary: MYH6 c.3619G>A (p.Glu1207Lys) results in a conservative amino acid change located in the Myosin tail domain (IPR002928) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 8.4e-05 in 249396 control chromosomes, predominantly at a frequency of 0.00016 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 6-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 a benign polymorphism found primarily in populations of Non-Finnish European origin. c.3619G>A has been reported in the literature in a proband affected with hypoplastic left heart syndrome, having been inherited from her unaffected father (Theis_2015). In addition, a ClinVar submitter reports detection of the variant in one individual with HCM (SCV000061139.5). These reports do 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. Six ClinVar submitters (evaluation after 2014) cite the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -

Hypertrophic cardiomyopathy 14

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 29, 2022

This variant is present in population databases (rs397516762, gnomAD 0.01%). 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: 44488). This missense change has been observed in individual(s) with hypoplastic left heart (PMID: 26085007). This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 1207 of the MYH6 protein (p.Glu1207Lys). -

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

Aug 09, 2021

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 14, 2023

The p.E1207K variant (also known as c.3619G>A), located in coding exon 24 of the MYH6 gene, results from a G to A substitution at nucleotide position 3619. The glutamic acid at codon 1207 is replaced by lysine, an amino acid with some similar properties. This alteration was reported in a proband with hypoplastic left heart syndrome who also carried a second missense alteration in MYH6; the p.E1207K alteration was also seen in the proband's unaffected father (Theis JL. Circ Cardiovasc Genet. 2015 Aug;8(4):564-71). This variant also co-occurred with a variant in the LMNA gene in an individual with dilated cardiomyopathy (van Lint FHM et al. Neth Heart J. 2019 Jun;27(6):304-309). This variant was also reported in a pediatric cardiomyopathy cohort (Ware SM et al. Am J Hum Genet, 2022 Feb;109:282-298). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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

Pathogenic

0.78

BayesDel_addAF

Uncertain

0.044

BayesDel_noAF

Uncertain

0.080

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.65

D;D

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.95

D;.

M_CAP

Pathogenic

0.60

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Uncertain

0.72

MutationAssessor

Pathogenic

3.5

H;H

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.87

PROVEAN

Uncertain

-2.6

D;D

REVEL

Pathogenic

0.80

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.0040

D;D

Polyphen

1.0

D;D

Vest4

0.97

MutPred

0.62

Gain of MoRF binding (P = 9e-04);Gain of MoRF binding (P = 9e-04);

MVP

0.94

MPC

3.0

ClinPred

0.67

GERP RS

4.2

Varity_R

0.39

gMVP

0.70

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