NM_000257.4(MYH7):c.829C>G (p.Leu277Val) AND Hypertrophic cardiomyopathy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Aug 4, 2021
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:: RCV001998634.5

Allele description [Variation Report for NM_000257.4(MYH7):c.829C>G (p.Leu277Val)]

NM_000257.4(MYH7):c.829C>G (p.Leu277Val)

Gene:

MYH7:myosin heavy chain 7 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

14q11.2

Genomic location:

Preferred name:

NM_000257.4(MYH7):c.829C>G (p.Leu277Val)

HGVS:

NC_000014.9:g.23430967G>C
NG_007884.1:g.9695C>G
NM_000257.4:c.829C>GMANE SELECT
NP_000248.2:p.Leu277Val
LRG_384t1:c.829C>G
LRG_384:g.9695C>G
NC_000014.8:g.23900176G>C
NM_000257.2:c.829C>G

Protein change:

L277V

Links:

dbSNP: rs786204367

NCBI 1000 Genomes Browser:

rs786204367

Molecular consequence:

NM_000257.4:c.829C>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Hypertrophic cardiomyopathy
Synonyms:: HYPERTROPHIC MYOCARDIOPATHY
Identifiers:: MONDO: MONDO:0005045; MeSH: D002312; MedGen: C0007194; Human Phenotype Ontology: HP:0001639

Recent activity

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intraflagellar transport protein 80 homolog isoform X3 [Mus musculus]
intraflagellar transport protein 80 homolog isoform X3 [Mus musculus]
gi|568923817|ref|XP_006502030.1|

Protein

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002262001	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Aug 4, 2021)	germline	clinical testing	PubMed (3) [See all records that cite these PMIDs] 27532257, 30731207, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002262001

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Aug 4, 2021)

germline

clinical testing

PubMed (3)
[See all records that cite these PMIDs]

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

Reassessment of Mendelian gene pathogenicity using 7,855 cardiomyopathy cases and 60,706 reference samples.

Walsh R, Thomson KL, Ware JS, Funke BH, Woodley J, McGuire KJ, Mazzarotto F, Blair E, Seller A, Taylor JC, Minikel EV, Exome Aggregation Consortium, MacArthur DG, Farrall M, Cook SA, Watkins H.

Genet Med. 2017 Feb;19(2):192-203. doi: 10.1038/gim.2016.90. Epub 2016 Aug 17.

PubMed [citation]

PMID:: 27532257
PMCID:: PMC5116235

Genetic Diagnostic Testing for Inherited Cardiomyopathies: Considerations for Offering Multi-Gene Tests in a Health Care Setting.

Daoud H, Ghani M, Nfonsam L, Potter R, Ordorica S, Haslett V, Santos N, Derksen H, Lahey D, McGill M, Trudel V, Antoniuk B, Vasli N, Chisholm C, Mettler G, Sinclair-Bourque E, McGowan-Jordan J, Smith A, Roberts R, Jarinova O.

J Mol Diagn. 2019 May;21(3):437-448. doi: 10.1016/j.jmoldx.2019.01.004. Epub 2019 Feb 4.

PubMed [citation]

PMID:: 30731207

See all PubMed Citations (3)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002262001.4

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

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. This variant is found within a region of MYH7 between codons 181 and 937 that contains the majority of the myosin head domain. Missense variants in this region have been shown to be significantly overrepresented in individuals with hypertrophic cardiomyopathy (PMID: 27532257). 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 are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This missense change has been observed in individual(s) with MYH7-related conditions (PMID: 30731207; Invitae). This variant is not present in population databases (ExAC no frequency). This sequence change replaces leucine with valine at codon 277 of the MYH7 protein (p.Leu277Val). The leucine residue is highly conserved and there is a small physicochemical difference between leucine and valine.

#	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: Sep 29, 2024

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