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NM_001849.4(COL6A2):c.1937G>A (p.Gly646Asp) AND Bethlem myopathy 1A

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Apr 9, 2018
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:
RCV000698242.7

Allele description [Variation Report for NM_001849.4(COL6A2):c.1937G>A (p.Gly646Asp)]

NM_001849.4(COL6A2):c.1937G>A (p.Gly646Asp)

Gene:
COL6A2:collagen type VI alpha 2 chain [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
21q22.3
Genomic location:
Preferred name:
NM_001849.4(COL6A2):c.1937G>A (p.Gly646Asp)
HGVS:
  • NC_000021.9:g.46125585G>A
  • NG_008675.1:g.32467G>A
  • NM_001849.4:c.1937G>AMANE SELECT
  • NM_058174.3:c.1937G>A
  • NM_058175.3:c.1937G>A
  • NP_001840.3:p.Gly646Asp
  • NP_001840.3:p.Gly646Asp
  • NP_478054.2:p.Gly646Asp
  • NP_478055.2:p.Gly646Asp
  • LRG_476t1:c.1937G>A
  • LRG_476:g.32467G>A
  • LRG_476p1:p.Gly646Asp
  • NC_000021.8:g.47545499G>A
  • NM_001849.3:c.1937G>A
Protein change:
G646D
Links:
dbSNP: rs752366811
NCBI 1000 Genomes Browser:
rs752366811
Molecular consequence:
  • NM_001849.4:c.1937G>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_058174.3:c.1937G>A - missense variant - [Sequence Ontology: SO:0001583]
  • NM_058175.3:c.1937G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Bethlem myopathy 1A
Synonyms:
Myopathy, benign congenital, with contractures; Bethlem myopathy 1
Identifiers:
MONDO: MONDO:0024530; MedGen: CN029274; Orphanet: 610; OMIM: 158810

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV000826896Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Apr 9, 2018) 		germlineclinical testing

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

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000826896.4

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This sequence change replaces glycine with aspartic acid at codon 646 of the COL6A2 protein (p.Gly646Asp). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and aspartic acid. This variant is present in population databases (rs752366811, ExAC 0.006%). This variant has not been reported in the literature in individuals with COL6A2-related disease. 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 disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024