Collagen Type I Alpha 2 Chain
Collagen Of Skin, Tendon And Bone, Alpha-2 Chain
Collagen I, Alpha-2 Polypeptide
Collagen, Type I, Alpha 2
Collagen Alpha-2(I) Chain
Alpha-2 Type I Collagen
Alpha 2(I)-Collagen
Type I Procollagen
OI4
Epididymis Secretory Sperm Binding Protein
Osteogenesis Imperfecta Type IV
Alpha 2 Type I Procollagen
Alpha-2 Collagen Type I
Collagen Type I Alpha 2
Alpha 2(I) Procollagen
EDSARTH2
EDSCV
This gene encodes the pro-alpha2 chain of type I collagen whose triple helix comprises two alpha1 chains and one alpha2 chain. Type I is a fibril-forming collagen found in most connective tissues and is abundant in bone, cornea, dermis and tendon. Mutations in this gene are associated with osteogenesis imperfecta types I-IV, Ehlers-Danlos syndrome type VIIB, recessive Ehlers-Danlos syndrome Classical type, idiopathic osteoporosis, and atypical Marfan syndrome. Symptoms associated with mutations in this gene, however, tend to be less severe than mutations in the gene for the alpha1 chain of type I collagen (COL1A1) reflecting the different role of alpha2 chains in matrix integrity. Three transcripts, resulting from the use of alternate polyadenylation signals, have been identified for this gene. [provided by R. Dalgleish, Feb 2008]
Forensic Context
A study in mice demonstrated that Col1a2, a canonical fibroblast marker gene, was used for cell type identification in radiation-induced skin injury [Yu et al. DOI:10.1186/s40164-025-00596-w]. In human erectile dysfunction, the COL1A2 was expressed in fibroblasts and showed higher expression in ligand-receptor interactions, with its expression increasing along a pseudotime trajectory from smooth muscle cells to fibroblasts, suggesting a role in fibrosis [Fang et al. DOI:10.3389/fendo.2022.874915]. A study in a Chinese Han population demonstrated that an indel polymorphism in the 3′UTR of the COL1A2 gene is associated with sudden cardiac death (SCD) risk [Zhou et al. DOI:10.1016/J.Legalmed.2020.101736].