dbSNP rs200273207: MYLK:p.Gln664Arg (chr3-123708847-T-C) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_053025.4(MYLK):c.1991A>G(p.Gln664Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000758 in 1,614,174 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00047 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00079 ( 3 hom. )

Consequence

MYLK
NM_053025.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:7

Conservation

PhyloP100: 3.21

Publications

5 publications found

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:

MYLK-AS1 (HGNC:42440): (MYLK antisense RNA 1)

MYLK-AS1 links:

LOC105369194 (HGNC:):

LOC105369194 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.16476527).

BP6

Variant 3-123708847-T-C is Benign according to our data. Variant chr3-123708847-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 228937.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000466 (71/152288) while in subpopulation SAS AF = 0.00124 (6/4824). AF 95% confidence interval is 0.000664. There are 1 homozygotes in GnomAd4. There are 33 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_053025.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MYLK	NM_053025.4	MANE Select	c.1991A>G	p.Gln664Arg	missense	Exon 15 of 34	NP_444253.3
MYLK	NM_053027.4		c.1991A>G	p.Gln664Arg	missense	Exon 15 of 33	NP_444255.3
MYLK	NM_053026.4		c.1784A>G	p.Gln595Arg	missense	Exon 14 of 33	NP_444254.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MYLK	ENST00000360304.8	TSL:5 MANE Select	c.1991A>G	p.Gln664Arg	missense	Exon 15 of 34	ENSP00000353452.3
MYLK	ENST00000464489.5	TSL:1	n.*1570A>G		non_coding_transcript_exon	Exon 14 of 33	ENSP00000417798.1
MYLK	ENST00000464489.5	TSL:1	n.*1570A>G		3_prime_UTR	Exon 14 of 33	ENSP00000417798.1

Frequencies

GnomAD3 genomes

AF:

0.000467

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00124

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000838

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000497

AC:

125

AN:

251488

AF XY:

0.000625

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000580

Gnomad OTH exome

AF:

0.000651

GnomAD4 exome

AF:

0.000788

AC:

1152

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000804

AC XY:

585

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.0000894

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00153

AC:

132

AN:

86256

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00208

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000851

AC:

946

AN:

1112008

Other (OTH)

AF:

0.000894

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.437

Heterozygous variant carriers

128

191

255

319

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

126

168

210

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000466

AC:

AN:

152288

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.0000962

AC:

AN:

41576

American (AMR)

AF:

0.000261

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00124

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000838

AC:

AN:

68012

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000410

Hom.:

Bravo

AF:

0.000408

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000453

AC:

EpiCase

AF:

0.000709

EpiControl

AF:

0.000296

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Familial thoracic aortic aneurysm and aortic dissection (2)

not provided (2)

not specified (2)

Aortic aneurysm, familial thoracic 7 (1)

MYLK-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.34

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.23

Eigen

Uncertain

0.24

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.90

M_CAP

Benign

0.021

MetaRNN

Benign

0.16

MetaSVM

Benign

-0.76

MutationAssessor

Benign

0.090

PhyloP100

3.2

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.2

REVEL

Benign

0.16

Sift

Benign

0.24

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.64

MVP

0.79

MPC

0.28

ClinPred

0.052

GERP RS

3.4

Varity_R

0.13

gMVP

0.36

Mutation Taster

=53/47

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over