Collagen alpha-1(X) chain is a protein that in humans is a member of the collagen family encoded by the COL10A1gene.[5][6]
This gene encodes the alpha chain of type X collagen, a short chain collagen expressed by hypertrophic chondrocytes during endochondral ossification. Unlike type VIII collagen, the other short chain collagen, type X collagen is a homotrimer. Type X collagen has a short triple helical collagen domain flanked by the N-terminal NC2 and the C-terminal NC1 domains. The C-terminal NC1 domain has complement C1q-like structure. Collagen X forms hexamer complexes through the association of NC1 regions.[7] Mutations in this gene are associated with Schmid type metaphyseal chondrodysplasia (SMCD) and Japanese type spondylometaphyseal dysplasia (SMD).[6]
Recent studies into the early detection of colon cancer have identified COL10A1 protein levels in serum as a potential diagnostic biomarker candidate to detect both adenoma lesions and tumor.[9]
Collagen alpha-1(X) undergoes degradation in the active growth plate releasing an intact NC1 region with a small amount of collagenous region attached. This degradation byproduct has been deemed CXM and has potential to be a useful biomarker to assess real time growth velocity in children and fracture healing in adults.[10]
^Leitinger B, Kwan AP (August 2006). "The discoidin domain receptor DDR2 is a receptor for type X collagen". Matrix Biol. 25 (6): 355–64. doi:10.1016/j.matbio.2006.05.006. PMID16806867.
Reichenberger E, Aigner T, von der Mark K, et al. (1992). "In situ hybridization studies on the expression of type X collagen in fetal human cartilage". Dev. Biol. 148 (2): 562–72. doi:10.1016/0012-1606(91)90274-7. PMID1743401.
Bonaventure J, Chaminade F, Maroteaux P (1995). "Mutations in three subdomains of the carboxy-terminal region of collagen type X account for most of the Schmid metaphyseal dysplasias". Hum. Genet. 96 (1): 58–64. doi:10.1007/BF00214187. PMID7607655. S2CID20888881.
McIntosh I, Abbott MH, Francomano CA (1995). "Concentration of mutations causing Schmid metaphyseal chondrodysplasia in the C-terminal noncollagenous domain of type X collagen". Hum. Mutat. 5 (2): 121–5. doi:10.1002/humu.1380050204. PMID7749409. S2CID26291298.
McIntosh I, Abbott MH, Warman ML, et al. (1994). "Additional mutations of type X collagen confirm COL10A1 as the Schmid metaphyseal chondrodysplasia locus". Hum. Mol. Genet. 3 (2): 303–7. doi:10.1093/hmg/3.2.303. PMID8004099.
Dharmavaram RM, Elberson MA, Peng M, et al. (1994). "Identification of a mutation in type X collagen in a family with Schmid metaphyseal chondrodysplasia". Hum. Mol. Genet. 3 (3): 507–9. doi:10.1093/hmg/3.3.507. PMID8012364.
Warman ML, Abbott M, Apte SS, et al. (1993). "A type X collagen mutation causes Schmid metaphyseal chondrodysplasia". Nat. Genet. 5 (1): 79–82. doi:10.1038/ng0993-79. PMID8220429. S2CID196834.
Pokharel RK, Alimsardjono H, Uno K, et al. (1996). "A novel mutation substituting tryptophan with arginine in the carboxyl-terminal, non-collagenous domain of collagen X in a case of Schmid metaphyseal chondrodysplasia". Biochem. Biophys. Res. Commun. 217 (3): 1157–62. doi:10.1006/bbrc.1995.2890. hdl:20.500.14094/D1001967. PMID8554571.
Beier F, Eerola I, Vuorio E, et al. (1997). "Variability in the upstream promoter and intron sequences of the human, mouse and chick type X collagen genes". Matrix Biol. 15 (6): 415–22. doi:10.1016/S0945-053X(96)90160-2. PMID9049979.