Total submissions: 1
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Invitae | RCV002241275 | SCV001390993 | pathogenic | Osteogenesis imperfecta type I; Ehlers-Danlos syndrome, classic type, 1 | 2021-09-17 | criteria provided, single submitter | clinical testing | This variant disrupts the triple helix domain of COL1A2. 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 COL1A2, 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. This missense change has been observed in individuals with osteogenesis imperfecta (PMID: 24501682). This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with arginine at codon 487 of the COL1A2 protein (p.Gly487Arg). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and arginine. |