NM_033118.4(MYLK2):c.243C>G (p.Asp81Glu) AND Hypertrophic cardiomyopathy 1

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Mar 25, 2022
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV002634256.2

Allele description [Variation Report for NM_033118.4(MYLK2):c.243C>G (p.Asp81Glu)]

NM_033118.4(MYLK2):c.243C>G (p.Asp81Glu)

Gene:

MYLK2:myosin light chain kinase 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

20q11.21

Genomic location:

Preferred name:

NM_033118.4(MYLK2):c.243C>G (p.Asp81Glu)

HGVS:

NC_000020.11:g.31820316C>G
NG_012847.1:g.5942C>G
NG_142691.1:g.577C>G
NM_033118.4:c.243C>GMANE SELECT
NP_149109.1:p.Asp81Glu
NP_149109.1:p.Asp81Glu
LRG_392t1:c.243C>G
LRG_392:g.5942C>G
LRG_392p1:p.Asp81Glu
NC_000020.10:g.30408119C>G
NM_033118.3:c.243C>G

Protein change:

D81E

Molecular consequence:

NM_033118.4:c.243C>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Hypertrophic cardiomyopathy 1
Synonyms:: Familial hypertrophic cardiomyopathy 1; MYH7-Related Familial Hypertrophic Cardiomyopathy
Identifiers:: MONDO: MONDO:0008647; MedGen: C3495498; OMIM: 192600

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV003518309	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Mar 25, 2022)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV003518309

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Mar 25, 2022)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240-242.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV003518309.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with MYLK2-related conditions. This variant is present in population databases (rs138517155, gnomAD 0.002%). This sequence change replaces aspartic acid, which is acidic and polar, with glutamic acid, which is acidic and polar, at codon 81 of the MYLK2 protein (p.Asp81Glu).

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Feb 14, 2024

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