NM_000257.4(MYH7):c.4909G>A (p.Ala1637Thr) AND Hypertrophic cardiomyopathy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jan 31, 2024
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:: RCV000465008.9

Allele description [Variation Report for NM_000257.4(MYH7):c.4909G>A (p.Ala1637Thr)]

NM_000257.4(MYH7):c.4909G>A (p.Ala1637Thr)

Genes:

LOC126861897:BRD4-independent group 4 enhancer GRCh37_chr14:23884455-23885654 [Gene]
MYH7:myosin heavy chain 7 [Gene - OMIM - HGNC]
MHRT:myosin heavy chain associated RNA transcript [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

14q11.2

Genomic location:

Preferred name:

NM_000257.4(MYH7):c.4909G>A (p.Ala1637Thr)

Other names:

p.A1637T:GCC>ACC; NM_000257.3(MYH7):c.4909G>A

HGVS:

NC_000014.9:g.23416048C>T
NG_007884.1:g.24614G>A
NM_000257.4:c.4909G>AMANE SELECT
NP_000248.2:p.Ala1637Thr
LRG_384t1:c.4909G>A
LRG_384:g.24614G>A
NC_000014.8:g.23885257C>T
NM_000257.2:c.4909G>A
NM_000257.3:c.4909G>A
NR_126491.1:n.309C>T
c.4909G>A

Protein change:

A1637T

Links:

dbSNP: rs141122361

NCBI 1000 Genomes Browser:

rs141122361

Molecular consequence:

NM_000257.4:c.4909G>A - missense variant - [Sequence Ontology: SO:0001583]
NR_126491.1:n.309C>T - non-coding transcript variant - [Sequence Ontology: SO:0001619]

Condition(s)

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

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000546282	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 31, 2024)	germline	clinical testing	PubMed (4) [See all records that cite these PMIDs] 20624503, 23782526, 27574918, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000546282

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 31, 2024)

germline

clinical testing

PubMed (4)
[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

Prevalence and spectrum of mutations in a cohort of 192 unrelated patients with hypertrophic cardiomyopathy.

Millat G, Bouvagnet P, Chevalier P, Dauphin C, Jouk PS, Da Costa A, Prieur F, Bresson JL, Faivre L, Eicher JC, Chassaing N, Crehalet H, Porcher R, Rodriguez-Lafrasse C, Rousson R.

Eur J Med Genet. 2010 Sep-Oct;53(5):261-7. doi: 10.1016/j.ejmg.2010.07.007. Epub 2010 Jul 30.

PubMed [citation]

PMID:: 20624503

Somatic MYH7, MYBPC3, TPM1, TNNT2 and TNNI3 mutations in sporadic hypertrophic cardiomyopathy.

Núñez L, Gimeno-Blanes JR, Rodríguez-García MI, Monserrat L, Zorio E, Coats C, McGregor CG, Hernandez del Rincón JP, Castro-Beiras A, Hermida-Prieto M.

Circ J. 2013;77(9):2358-65. Epub 2013 Jun 19.

PubMed [citation]

PMID:: 23782526

See all PubMed Citations (4)

Details of each submission

From Invitae, SCV000546282.9

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (4)

Description

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 1637 of the MYH7 protein (p.Ala1637Thr). This variant is present in population databases (rs141122361, gnomAD 0.09%). This missense change has been observed in individual(s) with hypertrophic cardiomyopathy (PMID: 20624503, 23782526, 27574918). ClinVar contains an entry for this variant (Variation ID: 43044). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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.

#	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: Jun 17, 2024

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