rs35436690

Variant names:

• chr3-123733783-T-C
• rs35436690
• NM_053025.4:c.1213A>G

Your query was ambiguous. Multiple possible variants found:

• chr3-123733783-T-C
• chr3-123733783-T-G

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS1

The NM_053025.4(MYLK):​c.1213A>G​(p.Met405Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000052 in 1,614,228 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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 0.000059 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000051 (0 hom.)
• Consequence: MYLK NM_053025.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: -1.03
• Publications: 5 publications found

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 Gene-Disease associations (from GenCC):

• aortic aneurysm, familial thoracic 7

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• megacystis-microcolon-intestinal hypoperistalsis syndrome 1

  Inheritance: AR Classification: STRONG Submitted by: G2P
• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: Unknown, AD Classification: STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet
• connective tissue disorder

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• megacystis-microcolon-intestinal hypoperistalsis syndrome

  Inheritance: AD, AR Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0084370375).
• BP6: Variant 3-123733783-T-C is Benign according to our data. Variant chr3-123733783-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 342898.
• BS1: Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.0000591 (9/152336) while in subpopulation EAS AF = 0.00155 (8/5170). AF 95% confidence interval is 0.00077. There are 0 homozygotes in GnomAd4. There are 6 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYLK	NM_053025.4	MANE Select	c.1213A>G	p.Met405Val	missense	Exon 10 of 34	NP_444253.3
	MYLK	NM_053027.4		c.1213A>G	p.Met405Val	missense	Exon 10 of 33	NP_444255.3
	MYLK	NM_053026.4		c.1213A>G	p.Met405Val	missense	Exon 10 of 33	NP_444254.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYLK	ENST00000360304.8	TSL:5 MANE Select	c.1213A>G	p.Met405Val	missense	Exon 10 of 34	ENSP00000353452.3	Q15746-1
	MYLK	ENST00000464489.5	TSL:1	n.*792A>G		non_coding_transcript_exon	Exon 9 of 33	ENSP00000417798.1	F8WBL7
	MYLK	ENST00000464489.5	TSL:1	n.*792A>G		3_prime_UTR	Exon 9 of 33	ENSP00000417798.1	F8WBL7

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152216 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00135

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000127 AC: 32 AN: 251248 AF XY: 0.000140

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00169

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000513 AC: 75 AN: 1461892 Hom.: 0 Cov.: 31 AF XY: 0.0000509 AC XY: 37 AN XY: 727248

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00159 AC: 63 AN: 39700

South Asian (SAS) AF: 0.0000812 AC: 7 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112012

Other (OTH) AF: 0.0000828 AC: 5 AN: 60396

GnomAD4 genome AF: 0.0000591 AC: 9 AN: 152336 Hom.: 0 Cov.: 32 AF XY: 0.0000805 AC XY: 6 AN XY: 74496

African (AFR) AF: 0.00 AC: 0 AN: 41584

American (AMR) AF: 0.00 AC: 0 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00155 AC: 8 AN: 5170

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000642

ExAC AF: 0.0000494 AC: 6

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Aortic aneurysm, familial thoracic 7 (2)
-	-	1	Familial thoracic aortic aneurysm and aortic dissection (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.62	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	0.0080
DANN	Benign	0.35
DEOGEN2	Benign	0.19	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.041	N
LIST_S2	Benign	0.57	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.0084	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.46	N
PhyloP100		-1.0
PrimateAI	Benign	0.20	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.031
Sift	Benign	0.29	T
Sift4G	Uncertain	0.048	D
Polyphen		0.0010	B
Vest4		0.029
MVP		0.42
MPC		0.16
ClinPred		0.016	T
GERP RS		-5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.041
gMVP		0.18
Mutation Taster		=98/2	polymorphism

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

Other links and lift over

dbSNP: rs35436690; hg19: chr3-123452630; COSMIC: COSV60608155;