rs142835596

Positions:

chr3-123708737-C-T

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_053025.4(MYLK):c.2101G>A(p.Ala701Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00104 in 1,614,186 control chromosomes in the GnomAD database, including 18 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0059 ( 12 hom., cov: 32)

Exomes 𝑓: 0.00053 ( 6 hom. )

Consequence

MYLK
NM_053025.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:13

Conservation

PhyloP100: -0.0310

Variant links:

Genes affected

MYLK (HGNC:7590): (myosin light chain kinase) This gene, a muscle member of the immunoglobulin gene superfamily, encodes myosin light chain kinase which is a calcium/calmodulin dependent enzyme. This kinase phosphorylates myosin regulatory light chains to facilitate myosin interaction with actin filaments to produce contractile activity. This gene encodes both smooth muscle and nonmuscle isoforms. In addition, using a separate promoter in an intron in the 3' region, it encodes telokin, a small protein identical in sequence to the C-terminus of myosin light chain kinase, that is independently expressed in smooth muscle and functions to stabilize unphosphorylated myosin filaments. A pseudogene is located on the p arm of chromosome 3. Four transcript variants that produce four isoforms of the calcium/calmodulin dependent enzyme have been identified as well as two transcripts that produce two isoforms of telokin. Additional variants have been identified but lack full length transcripts. [provided by RefSeq, Jul 2008]

MYLK links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYLK. . Gene score misZ 1.1317 (greater than the threshold 3.09). Trascript score misZ 3.1503 (greater than threshold 3.09). GenCC has associacion of gene with familial thoracic aortic aneurysm and aortic dissection, connective tissue disorder, megacystis-microcolon-intestinal hypoperistalsis syndrome, aortic aneurysm, familial thoracic 7.

BP4

Computational evidence support a benign effect (MetaRNN=0.012049317).

BP6

Variant 3-123708737-C-T is Benign according to our data. Variant chr3-123708737-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 241754.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-123708737-C-T is described in Lovd as [Benign]. Variant chr3-123708737-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00587 (895/152352) while in subpopulation AFR AF= 0.0201 (837/41578). AF 95% confidence interval is 0.019. There are 12 homozygotes in gnomad4. There are 421 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 12 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYLK	NM_053025.4 linkuse as main transcript	c.2101G>A	p.Ala701Thr	missense_variant	15/34	ENST00000360304.8	NP_444253.3
LOC105369194	XR_924417.4 linkuse as main transcript	n.252-3620C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYLK	ENST00000360304.8 linkuse as main transcript	c.2101G>A	p.Ala701Thr	missense_variant	15/34	5	NM_053025.4	ENSP00000353452	P4	Q15746-1
	ENST00000685586.1 linkuse as main transcript	n.612-3620C>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.00583

AC:

887

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0200

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00281

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00525

GnomAD3 exomes

AF:

0.00146

AC:

366

AN:

251314

Hom.:

AF XY:

0.00109

AC XY:

148

AN XY:

135868

show subpopulations

Gnomad AFR exome

AF:

0.0202

Gnomad AMR exome

AF:

0.000838

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000534

AC:

780

AN:

1461834

Hom.:

Cov.:

AF XY:

0.000483

AC XY:

351

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.0182

Gnomad4 AMR exome

AF:

0.00123

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000369

Gnomad4 OTH exome

AF:

0.00111

GnomAD4 genome

AF:

0.00587

AC:

895

AN:

152352

Hom.:

Cov.:

AF XY:

0.00565

AC XY:

421

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.0201

Gnomad4 AMR

AF:

0.00281

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00520

Alfa

AF:

0.00106

Hom.:

Bravo

AF:

0.00683

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.0197

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00181

AC:

220

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:13

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:6

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute	Jan 16, 2020	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 30, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 28, 2022	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not provided

Benign:3

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Aug 16, 2022	- -

Aortic aneurysm, familial thoracic 7

Benign:2

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. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:2

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Sep 22, 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. -
Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Nov 23, 2016	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.54

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.31

.;.;.;T;.;T

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.056

LIST_S2

Benign

0.78

.;T;T;T;.;.

MetaRNN

Benign

0.012

T;T;T;T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Uncertain

2.3

M;.;M;M;.;M

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Benign

0.31

PROVEAN

Benign

-1.3

N;.;N;N;N;N

REVEL

Benign

0.13

Sift

Benign

0.30

T;.;T;T;T;T

Sift4G

Benign

0.34

T;T;T;T;T;T

Polyphen

0.28

B;B;B;B;B;B

Vest4

0.31

MVP

0.63

MPC

0.21

ClinPred

0.0024

GERP RS

1.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.023

gMVP

0.30

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