rs2233261

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_000432.4(MYL2):c.381G>A(p.Ala127=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000938 in 1,614,156 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A127A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0051 ( 10 hom., cov: 33)

Exomes 𝑓: 0.00051 ( 10 hom. )

Consequence

MYL2
NM_000432.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:15

Conservation

PhyloP100: -5.02

Variant links:

Genes affected

MYL2 (HGNC:7583): (myosin light chain 2) This gene encodes a major sarcomeric protein in mammalian striated muscle. The encoded protein plays a role in embryonic heart muscle structure and function, while phosphorylation of the encoded protein is involved in cardiac myosin cycling kinetics, torsion and function in adults. Mutations in this gene are associated with hypertrophic cardiomyopathy 10 and infant-onset myopathy. [provided by RefSeq, May 2022]

MYL2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.65).

BP6

Variant 12-110913117-C-T is Benign according to our data. Variant chr12-110913117-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 36646.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-110913117-C-T is described in Lovd as [Benign]. Variant chr12-110913117-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-5.02 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00509 (775/152262) while in subpopulation AFR AF= 0.0182 (755/41536). AF 95% confidence interval is 0.0171. There are 10 homozygotes in gnomad4. There are 337 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High AC in GnomAd at 775 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MYL2	NM_000432.4 linkuse as main transcript	c.381G>A	p.Ala127=	synonymous_variant	6/7	ENST00000228841.15
MYL2	NM_001406745.1 linkuse as main transcript	c.339G>A	p.Ala113=	synonymous_variant	5/6
MYL2	NM_001406916.1 linkuse as main transcript	c.324G>A	p.Ala108=	synonymous_variant	6/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
MYL2	ENST00000228841.15 linkuse as main transcript	c.381G>A	p.Ala127=	synonymous_variant	6/7	1	NM_000432.4	P1
MYL2	ENST00000548438.1 linkuse as main transcript	c.339G>A	p.Ala113=	synonymous_variant	5/6	3
MYL2	ENST00000663220.1 linkuse as main transcript	c.324G>A	p.Ala108=	synonymous_variant	6/7
MYL2	ENST00000549029.1 linkuse as main transcript			downstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.00509

AC:

775

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0182

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

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:

0.0000294

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00120

AC:

301

AN:

251490

Hom.:

AF XY:

0.000861

AC XY:

117

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.0179

Gnomad AMR exome

AF:

0.000202

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000506

AC:

739

AN:

1461894

Hom.:

Cov.:

AF XY:

0.000433

AC XY:

315

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0199

Gnomad4 AMR exome

AF:

0.000268

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.000811

GnomAD4 genome

AF:

0.00509

AC:

775

AN:

152262

Hom.:

Cov.:

AF XY:

0.00453

AC XY:

337

AN XY:

74454

show subpopulations

Gnomad4 AFR

AF:

0.0182

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00237

Hom.:

Bravo

AF:

0.00552

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:15

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jun 20, 2008	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 07, 2014	- -

Hypertrophic cardiomyopathy 10

Benign:3

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Cardiomyopathy

Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 08, 2018	- -
Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Dec 03, 2015	- -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Hypertrophic cardiomyopathy

Benign:2

Benign, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Feb 05, 2024	- -
Benign, no assertion criteria provided	clinical testing	Cohesion Phenomics	Oct 10, 2022	- -

Primary familial hypertrophic cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 18, 2011

- -

Cardiovascular phenotype

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 15, 2015

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

Cadd

Benign

0.11

Dann

Benign

0.64

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