rs190342289

Positions:

• chr14-23394337-G-A
• chr14-23394337-G-C

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_Strong BP6_Very_Strong BS2

The NM_002471.4(MYH6):​c.2430-14C>T variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000424 in 1,614,126 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0011 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00036 (5 hom.)
• Consequence: MYH6 NM_002471.4 splice_polypyrimidine_tract, intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7
• Conservation: PhyloP100: 0.156

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]

ACMG classification

Verdict is Benign. Variant got -16 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 14-23394337-G-A is Benign according to our data. Variant chr14-23394337-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 178070.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-23394337-G-A is described in Lovd as [Benign]. Variant chr14-23394337-G-A is described in Lovd as [Likely_benign].
• BS2: High AC in GnomAd4 at 165 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH6	NM_002471.4	c.2430-14C>T		splice_polypyrimidine_tract_variant, intron_variant		ENST00000405093.9	NP_002462.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH6	ENST00000405093.9	c.2430-14C>T		splice_polypyrimidine_tract_variant, intron_variant		5	NM_002471.4	ENSP00000386041	P1

Frequencies

GnomAD3 genomes AF: 0.00108 AC: 164 AN: 152230 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00289

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.000265

Gnomad OTH AF: 0.000957

GnomAD3 exomes AF: 0.000551 AC: 138 AN: 250562 Hom.: 2 AF XY: 0.000583 AC XY: 79 AN XY: 135454

Gnomad AFR exome AF: 0.00302

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00127

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000336

Gnomad OTH exome AF: 0.000490

GnomAD4 exome AF: 0.000356 AC: 520 AN: 1461778 Hom.: 5 Cov.: 33 AF XY: 0.000384 AC XY: 279 AN XY: 727178

Gnomad4 AFR exome AF: 0.00320

Gnomad4 AMR exome AF: 0.000313

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00148

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000196

Gnomad4 OTH exome AF: 0.000662

GnomAD4 genome AF: 0.00108 AC: 165 AN: 152348 Hom.: 0 Cov.: 32 AF XY: 0.00106 AC XY: 79 AN XY: 74502

Gnomad4 AFR AF: 0.00289

Gnomad4 AMR AF: 0.000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00228

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000265

Gnomad4 OTH AF: 0.000947

Alfa AF: 0.000128 Hom.: 0

Bravo AF: 0.00120

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 01, 2017	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jun 30, 2014	c.2430-14C>T in intron 20 of MYH6: This variant is not expected to have clinical significance because a C>T change at this position does not diverge from the sp lice consensus sequence and is therefore unlikely to impact splicing. It has bee n identified in 0.2% (11/4406) of African American chromosomes by the NHLBI Exom e Sequencing Project (http://evs.gs.washington.edu/EVS; dbSNP rs190342289). -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Hypertrophic cardiomyopathy 14 Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 09, 2024

- -

not provided Benign:1

Likely benign, no assertion criteria provided

clinical testing

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

-

- -

MYH6-related disorder Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Mar 19, 2021

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	2.3
DANN	Benign	0.31

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

Other links and lift over

dbSNP: rs190342289; hg19: chr14-23863546;