ClinVar Miner

Submissions for variant NM_000088.3(COL1A1):c.779G>T (p.Gly260Val)

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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000822219 SCV000963010 likely pathogenic Osteogenesis imperfecta type I 2018-12-21 criteria provided, single submitter clinical testing This sequence change replaces glycine with valine at codon 260 of the COL1A1 protein (p.Gly260Val). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and valine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with COL1A1-related conditions. 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 COL1A1, missense variants at these glycine residues are significantly enriched in individuals with disease (PMID: 9016532, 17078022) compared to the general population (ExAC). In summary, this variant is a novel missense change affecting a residue that is known to be critical for normal protein structure, stability and function. This type of missense change is also highly enriched in affected individuals and expected to be pathogenic. However, without additional functional and/or genetic data, this variant has been classified as Likely Pathogenic.

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