ClinVar Miner

Submissions for variant NM_001844.5(COL2A1):c.1340G>A (p.Gly447Asp)

dbSNP: rs886043561
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Eurofins Ntd Llc (ga) RCV000284452 SCV000340717 likely pathogenic not provided 2016-05-19 criteria provided, single submitter clinical testing
Invitae RCV000284452 SCV003786562 pathogenic not provided 2022-04-24 criteria provided, single submitter clinical testing This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 447 of the COL2A1 protein (p.Gly447Asp). This missense change has been observed in individual(s) with achondrogenesis (PMID: 31006186). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 287067). 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) performed at Invitae indicates that this missense variant is expected to disrupt COL2A1 protein function. This variant disrupts the triple helix domain of COL2A1. Glycine residues within the Gly-Xaa-Yaa repeats of the triple helix domain are required for the structure and stability of fibrillar collagens (PMID: 7695699, 8218237, 19344236). In COL2A1, variants affecting these glycine residues are significantly enriched in individuals with disease (PMID: 9016532, 17078022) compared to the general population (ExAC). For these reasons, this variant has been classified as Pathogenic.

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