Variant chr14-23386626-G-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_002471.4(MYH6):c.4651-3C>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000908 in 1,607,918 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000091 ( 0 hom. )

Consequence

MYH6
NM_002471.4 splice_region, intron

Scores

Splicing: ADA: 0.9602

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4B:2

Conservation

PhyloP100: 0.0700

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:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.58).

BS2

High AC in GnomAd4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH6	NM_002471.4 linkuse as main transcript	c.4651-3C>A		splice_region_variant, intron_variant		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.4651-3C>A		splice_region_variant, intron_variant		5	NM_002471.4	ENSP00000386041.3		P13533

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000155

AC:

AN:

245558

Hom.:

AF XY:

0.000166

AC XY:

AN XY:

132594

show subpopulations

Gnomad AFR exome

AF:

0.0000628

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.000627

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000339

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000199

Gnomad OTH exome

AF:

0.000333

GnomAD4 exome

AF:

0.0000914

AC:

133

AN:

1455766

Hom.:

Cov.:

AF XY:

0.000105

AC XY:

AN XY:

723210

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.000583

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000468

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000839

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152152

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.000121

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:2

Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 30, 2018	A variant of uncertain significance has been identified in the MYH6 gene. The c.4651-3 C>A variant has not been published as pathogenic or been reported as benign to our knowledge. The c.4651-3 C>A variant is observed in 7/9634 (0.07%) alleles from individuals of Ashkenazi Jewish background and in 45/271634 (0.02%) global alleles in large population cohorts (Lek et al., 2016). This substitution occurs at a nucleotide that is not conserved. In-silico splice algorithms are inconclusive as to whether this variant impacts the natural splice acceptor site in intron 32 and results in abnormal gene splicing. In the absence of functional mRNA studies, the physiological consequence of this variant cannot be precisely determined. -

Hypertrophic cardiomyopathy 14

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 22, 2023	This sequence change falls in intron 32 of the MYH6 gene. It does not directly change the encoded amino acid sequence of the MYH6 protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs572175190, gnomAD 0.07%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with MYH6-related conditions. ClinVar contains an entry for this variant (Variation ID: 239176). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Jul 25, 2019	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 11, 2023

The c.4651-3C>A intronic variant results from a C to A substitution 3 nucleotides before coding exon 31 in the MYH6 gene. This nucleotide position is well conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will not have any significant effect on splicing. 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

BayesDel_noAF

Benign

-0.58

CADD

Benign

DANN

Benign

0.93

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.96

dbscSNV1_RF

Benign

0.67

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

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