NM_000257.4:c.2044+39A>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_000257.4(MYH7):c.2044+39A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00255 in 1,576,048 control chromosomes in the GnomAD database, including 88 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.013 ( 33 hom., cov: 32)

Exomes 𝑓: 0.0015 ( 55 hom. )

Consequence

MYH7
NM_000257.4 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -3.06

Publications

2 publications found

Variant links:

Genes affected

MYH7 (HGNC:7577): (myosin heavy chain 7) Muscle myosin is a hexameric protein containing 2 heavy chain subunits, 2 alkali light chain subunits, and 2 regulatory light chain subunits. This gene encodes the beta (or slow) heavy chain subunit of cardiac myosin. It is expressed predominantly in normal human ventricle. It is also expressed in skeletal muscle tissues rich in slow-twitch type I muscle fibers. Changes in the relative abundance of this protein and the alpha (or fast) heavy subunit of cardiac myosin correlate with the contractile velocity of cardiac muscle. Its expression is also altered during thyroid hormone depletion and hemodynamic overloading. Mutations in this gene are associated with familial hypertrophic cardiomyopathy, myosin storage myopathy, dilated cardiomyopathy, and Laing distal myopathy. [provided by RefSeq, May 2022]

MYH7 Gene-Disease associations (from GenCC):

dilated cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
dilated cardiomyopathy 1S
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
hypertrophic cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
hypertrophic cardiomyopathy 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
MYH7-related skeletal myopathy
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics
myopathy, myosin storage, autosomal recessive
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
myopathy, myosin storage, autosomal dominant
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
congenital myopathy 7A, myosin storage, autosomal dominant
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Ebstein anomaly
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hyaline body myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
left ventricular noncompaction
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
arrhythmogenic right ventricular cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
congenital heart disease
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

MYH7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

BP6

Variant 14-23426738-T-A is Benign according to our data. Variant chr14-23426738-T-A is described in ClinVar as Likely_benign. ClinVar VariationId is 188613.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0127 (1933/152268) while in subpopulation AFR AF = 0.0443 (1841/41552). AF 95% confidence interval is 0.0426. There are 33 homozygotes in GnomAd4. There are 915 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 33 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH7	NM_000257.4 link	c.2044+39A>T		intron_variant	Intron 18 of 39	ENST00000355349.4	NP_000248.2	P12883
MYH7	NM_001407004.1 link	c.2044+39A>T		intron_variant	Intron 17 of 38		NP_001393933.1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYH7	ENST00000355349.4 link	c.2044+39A>T	intron_variant	Intron 18 of 39	1	NM_000257.4	ENSP00000347507.3	P12883
MYH7	ENST00000713768.1 link	c.2044+39A>T	intron_variant	Intron 18 of 40			ENSP00000519070.1
MYH7	ENST00000713769.1 link	c.2044+39A>T	intron_variant	Intron 17 of 38			ENSP00000519071.1

Frequencies

GnomAD3 genomes

AF:

0.0127

AC:

1928

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0443

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00314

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.00813

GnomAD2 exomes

AF:

0.00314

AC:

789

AN:

251052

AF XY:

0.00220

show subpopulations

Gnomad AFR exome

AF:

0.0421

Gnomad AMR exome

AF:

0.00171

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000238

Gnomad OTH exome

AF:

0.00163

GnomAD4 exome

AF:

0.00146

AC:

2082

AN:

1423780

Hom.:

Cov.:

AF XY:

0.00129

AC XY:

918

AN XY:

710544

show subpopulations

African (AFR)

AF:

0.0489

AC:

1596

AN:

32606

American (AMR)

AF:

0.00179

AC:

AN:

44646

Ashkenazi Jewish (ASJ)

AF:

0.0000386

AC:

AN:

25932

East Asian (EAS)

AF:

0.00

AC:

AN:

39514

South Asian (SAS)

AF:

0.000222

AC:

AN:

85436

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53396

Middle Eastern (MID)

AF:

0.00248

AC:

AN:

5648

European-Non Finnish (NFE)

AF:

0.000203

AC:

219

AN:

1077492

Other (OTH)

AF:

0.00259

AC:

153

AN:

59110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

109

218

326

435

544

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

112

168

224

280

<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:

0.0127

AC:

1933

AN:

152268

Hom.:

Cov.:

AF XY:

0.0123

AC XY:

915

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.0443

AC:

1841

AN:

41552

American (AMR)

AF:

0.00314

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.000622

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.0102

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000309

AC:

AN:

68018

Other (OTH)

AF:

0.00804

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

100

200

301

401

501

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

120

<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:

0.00666

Hom.:

Bravo

AF:

0.0138

Asia WGS

AF:

0.00231

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Jul 07, 2018

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

0.020

(source)

DANN

Benign

0.65

PhyloP100

-3.1

Mutation Taster

=100/0

polymorphism

(source)

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

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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