NM_001927.4(DES):c.1009G>A (p.Ala337Thr) AND Desmin-related myofibrillar myopathy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jan 9, 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:: RCV000695966.6

Allele description [Variation Report for NM_001927.4(DES):c.1009G>A (p.Ala337Thr)]

NM_001927.4(DES):c.1009G>A (p.Ala337Thr)

Gene:

DES:desmin [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

2q35

Genomic location:

Preferred name:

NM_001927.4(DES):c.1009G>A (p.Ala337Thr)

HGVS:

NC_000002.12:g.219420939G>A
NG_008043.1:g.7563G>A
NM_001927.4:c.1009G>AMANE SELECT
NP_001918.3:p.Ala337Thr
LRG_380t1:c.1009G>A
LRG_380:g.7563G>A
NC_000002.11:g.220285661G>A
NM_001927.3:c.1009G>A

Protein change:

A337T

Links:

dbSNP: rs59962885

NCBI 1000 Genomes Browser:

rs59962885

Molecular consequence:

NM_001927.4:c.1009G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Desmin-related myofibrillar myopathy (MFM1)
Synonyms:: Desminopathy; Desmin related myopathy (former name); Desmin storage myopathy (former name); See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0011076; MedGen: C1832370; Orphanet: 363543; Orphanet: 98909; OMIM: 601419

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000824507	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jan 9, 2024)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 29247119, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000824507

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jan 9, 2024)

germline

clinical testing

PubMed (2)
[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

Applying High-Resolution Variant Classification to Cardiac Arrhythmogenic Gene Testing in a Demographically Diverse Cohort of Sudden Unexplained Deaths.

Lin Y, Williams N, Wang D, Coetzee W, Zhou B, Eng LS, Um SY, Bao R, Devinsky O, McDonald TV, Sampson BA, Tang Y.

Circ Cardiovasc Genet. 2017 Dec;10(6). doi:pii: e001839. 10.1161/CIRCGENETICS.117.001839.

PubMed [citation]

PMID:: 29247119

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, SCV000824507.6

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 337 of the DES protein (p.Ala337Thr). This variant is present in population databases (rs59962885, gnomAD 0.03%). This missense change has been observed in individual(s) with sudden unexplained death (PMID: 29247119). ClinVar contains an entry for this variant (Variation ID: 382176). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DES 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: Apr 20, 2024

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