chr20-31820339-G-A

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_033118.4(MYLK2):c.266G>A(p.Gly89Asp) variant causes a missense change. The variant allele was found at a frequency of 0.00229 in 1,612,926 control chromosomes in the GnomAD database, including 67 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 ( 36 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 31 hom. )

Consequence

MYLK2
NM_033118.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 4.64

Variant links:

Genes affected

MYLK2 (HGNC:16243): (myosin light chain kinase 2) This gene encodes a myosin light chain kinase, a calcium/calmodulin dependent enzyme, that is exclusively expressed in adult skeletal muscle. [provided by RefSeq, Jul 2008]

MYLK2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0046992004).

BP6

Variant 20-31820339-G-A is Benign according to our data. Variant chr20-31820339-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 46523.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr20-31820339-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0125 (1908/152348) while in subpopulation AFR AF= 0.044 (1831/41582). AF 95% confidence interval is 0.0424. There are 36 homozygotes in gnomad4. There are 890 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 1908 AD,Digenic gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYLK2	NM_033118.4 link	c.266G>A	p.Gly89Asp	missense_variant	Exon 3 of 13	ENST00000375985.5	NP_149109.1	Q9H1R3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYLK2	ENST00000375985.5 link	c.266G>A	p.Gly89Asp	missense_variant	Exon 3 of 13	1	NM_033118.4	ENSP00000365152.4		Q9H1R3
MYLK2	ENST00000375994.6 link	c.266G>A	p.Gly89Asp	missense_variant	Exon 2 of 12	1		ENSP00000365162.2		Q9H1R3

Frequencies

GnomAD3 genomes

AF:

0.0125

AC:

1904

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0441

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00301

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:

0.000132

Gnomad OTH

AF:

0.0105

GnomAD3 exomes

AF:

0.00317

AC:

783

AN:

246836

Hom.:

AF XY:

0.00226

AC XY:

304

AN XY:

134392

show subpopulations

Gnomad AFR exome

AF:

0.0457

Gnomad AMR exome

AF:

0.00171

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000814

Gnomad OTH exome

AF:

0.00116

GnomAD4 exome

AF:

0.00122

AC:

1786

AN:

1460578

Hom.:

Cov.:

AF XY:

0.00103

AC XY:

751

AN XY:

726574

show subpopulations

Gnomad4 AFR exome

AF:

0.0441

Gnomad4 AMR exome

AF:

0.00183

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000378

Gnomad4 OTH exome

AF:

0.00288

GnomAD4 genome

AF:

0.0125

AC:

1908

AN:

152348

Hom.:

Cov.:

AF XY:

0.0119

AC XY:

890

AN XY:

74492

show subpopulations

Gnomad4 AFR

AF:

0.0440

Gnomad4 AMR

AF:

0.00300

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.0104

Alfa

AF:

0.00357

Hom.:

Bravo

AF:

0.0138

ESP6500AA

AF:

0.0406

AC:

178

ESP6500EA

AF:

0.000234

AC:

ExAC

AF:

0.00394

AC:

478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 02, 2012	Gly89Asp in exon 3 of MYLK2: This variant is not expected to have clinical signi ficance because it has been identified in 3.9% (146/3716) of African American ch romosomes from a broad population by the NHLBI Exome Sequencing Project (http:// evs.gs.washington.edu/EVS; dbSNP rs115398036). -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 13, 2014	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. -

Hypertrophic cardiomyopathy 1

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2025	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 20, 2020	- -

Cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Jan 18, 2016

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Hypertrophic cardiomyopathy

Benign:1

Benign, no assertion criteria provided

research

Zaffran Lab, Genetics of Cardiac Diseases Laboratory, Marseille Medical Genetics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

T;T

Eigen

Benign

0.18

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.86

LIST_S2

Benign

0.75

.;T

MetaRNN

Benign

0.0047

T;T

MetaSVM

Benign

-0.90

MutationAssessor

Uncertain

2.3

M;M

PrimateAI

Uncertain

0.56

PROVEAN

Benign

0.21

N;N

REVEL

Benign

0.12

Sift

Uncertain

0.0010

D;D

Sift4G

Benign

0.49

T;T

Polyphen

0.99

D;D

Vest4

0.73

MVP

0.76

MPC

0.52

ClinPred

0.022

GERP RS

4.7

Varity_R

0.21

gMVP

0.045

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

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