Genetic Variant MYH6:c.3979-8_3979-7insCT (chr14-23389062-A-AAG) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_002471.4(MYH6):c.3979-8_3979-7insCT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 0)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

MYH6
NM_002471.4 splice_region, intron

Scores

Not classified

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.275

Publications

0 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.

BP6

Variant 14-23389062-A-AAG is Benign according to our data. Variant chr14-23389062-A-AAG is described in ClinVar as Likely_benign. ClinVar VariationId is 470534.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYH6	NM_002471.4 link	c.3979-8_3979-7insCT		splice_region_variant, intron_variant	Intron 28 of 38	ENST00000405093.9	NP_002462.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYH6	ENST00000405093.9 link	c.3979-8_3979-7insCT		splice_region_variant, intron_variant	Intron 28 of 38	5	NM_002471.4	ENSP00000386041.3		P13533

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000283

AC:

AN:

1059836

Hom.:

Cov.:

AF XY:

0.00000189

AC XY:

AN XY:

528142

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

30388

American (AMR)

AF:

0.0000338

AC:

AN:

29558

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19390

East Asian (EAS)

AF:

0.00

AC:

AN:

27800

South Asian (SAS)

AF:

0.0000305

AC:

AN:

65526

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35024

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4196

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

802784

Other (OTH)

AF:

0.00

AC:

AN:

45170

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000103), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hypertrophic cardiomyopathy 14

Benign:1

Sep 05, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.28

Splicing

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over