3fby is a 3 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
COMP_HUMAN Defects in COMP are the cause of multiple epiphyseal dysplasia type 1 (EDM1) [MIM:132400. EDM is a generalized skeletal dysplasia associated with significant morbidity. Joint pain, joint deformity, waddling gait, and short stature are the main clinical signs and symptoms. EDM is broadly categorized into the more severe Fairbank and the milder Ribbing types.[1][2][3][4][5][6][7][8][9] Defects in COMP are the cause of pseudoachondroplasia (PSACH) [MIM:177170. PSAC is a dominantly inherited chondrodysplasia characterized by short stature and early-onset osteoarthrosis. PSACH is more severe than EDM1 and is recognized in early childhood.[10][11][12][13][14][15][16][17][18][19][20][21]
Function
COMP_HUMAN May play a role in the structural integrity of cartilage via its interaction with other extracellular matrix proteins such as the collagens and fibronectin. Can mediate the interaction of chondrocytes with the cartilage extracellular matrix through interaction with cell surface integrin receptors. Could play a role in the pathogenesis of osteoarthritis. Potent suppressor of apoptosis in both primary chondrocytes and transformed cells. Suppresses apoptosis by blocking the activation of caspase-3 and by inducing the IAP family of survival proteins (BIRC3, BIRC2, BIRC5 and XIAP). Essential for maintaining a vascular smooth muscle cells (VSMCs) contractile/differentiated phenotype under physiological and pathological stimuli. Maintains this phenotype of VSMCs by interacting with ITGA7 (By similarity).[22][23][24]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Cartilage oligomeric matrix protein (COMP), or thrombospondin-5 (TSP-5), is a secreted glycoprotein that is important for growth plate organization and function. Mutations in COMP cause two skeletal dysplasias, pseudoachondroplasia (PSACH) and multiple epiphyseal dysplasia (EDM1). In this study, we determined the structure of a recombinant protein that contains the last epidermal growth factor repeat, the type 3 repeats and the C-terminal domain (CTD) of COMP to 3.15-A resolution limit by X-ray crystallography. The CTD is a beta-sandwich that is composed of 15 antiparallel beta-strands, and the type 3 repeats are a contiguous series of calcium binding sites that associate with the CTD at multiple points. The crystal packing reveals an exposed potential metal-ion-dependent adhesion site (MIDAS) on one edge of the beta-sandwich that is common to all TSPs and may serve as a binding site for collagens and other ligands. Disease-causing mutations in COMP disrupt calcium binding, disulfide bond formation, intramolecular interactions, or sites for potential ligand binding. The structure presented here and its unique molecular packing in the crystal identify potential interactive sites for glycosaminoglycans, integrins, and collagens, which are key to cartilage structure and function.
The crystal structure of the signature domain of cartilage oligomeric matrix protein: implications for collagen, glycosaminoglycan and integrin binding.,Tan K, Duquette M, Joachimiak A, Lawler J FASEB J. 2009 Aug;23(8):2490-501. Epub 2009 Mar 10. PMID:19276170[25]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑Thur J, Rosenberg K, Nitsche DP, Pihlajamaa T, Ala-Kokko L, Heinegard D, Paulsson M, Maurer P. Mutations in cartilage oligomeric matrix protein causing pseudoachondroplasia and multiple epiphyseal dysplasia affect binding of calcium and collagen I, II, and IX. J Biol Chem. 2001 Mar 2;276(9):6083-92. Epub 2000 Nov 17. PMID:11084047 doi:10.1074/jbc.M009512200
↑Briggs MD, Hoffman SM, King LM, Olsen AS, Mohrenweiser H, Leroy JG, Mortier GR, Rimoin DL, Lachman RS, Gaines ES, et al.. Pseudoachondroplasia and multiple epiphyseal dysplasia due to mutations in the cartilage oligomeric matrix protein gene. Nat Genet. 1995 Jul;10(3):330-6. PMID:7670472 doi:https://dx.doi.org/10.1038/ng0795-330
↑Ballo R, Briggs MD, Cohn DH, Knowlton RG, Beighton PH, Ramesar RS. Multiple epiphyseal dysplasia, ribbing type: a novel point mutation in the COMP gene in a South African family. Am J Med Genet. 1997 Feb 11;68(4):396-400. PMID:9021009
↑Susic S, McGrory J, Ahier J, Cole WG. Multiple epiphyseal dysplasia and pseudoachondroplasia due to novel mutations in the calmodulin-like repeats of cartilage oligomeric matrix protein. Clin Genet. 1997 Apr;51(4):219-24. PMID:9184241
↑Briggs MD, Mortier GR, Cole WG, King LM, Golik SS, Bonaventure J, Nuytinck L, De Paepe A, Leroy JG, Biesecker L, Lipson M, Wilcox WR, Lachman RS, Rimoin DL, Knowlton RG, Cohn DH. Diverse mutations in the gene for cartilage oligomeric matrix protein in the pseudoachondroplasia-multiple epiphyseal dysplasia disease spectrum. Am J Hum Genet. 1998 Feb;62(2):311-9. PMID:9463320 doi:10.1086/301713
↑Ikegawa S, Ohashi H, Nishimura G, Kim KC, Sannohe A, Kimizuka M, Fukushima Y, Nagai T, Nakamura Y. Novel and recurrent COMP (cartilage oligomeric matrix protein) mutations in pseudoachondroplasia and multiple epiphyseal dysplasia. Hum Genet. 1998 Dec;103(6):633-8. PMID:9921895
↑Loughlin J, Irven C, Mustafa Z, Briggs MD, Carr A, Lynch SA, Knowlton RG, Cohn DH, Sykes B. Identification of five novel mutations in cartilage oligomeric matrix protein gene in pseudoachondroplasia and multiple epiphyseal dysplasia. Hum Mutat. 1998;Suppl 1:S10-7. PMID:9452026
↑Czarny-Ratajczak M, Lohiniva J, Rogala P, Kozlowski K, Perala M, Carter L, Spector TD, Kolodziej L, Seppanen U, Glazar R, Krolewski J, Latos-Bielenska A, Ala-Kokko L. A mutation in COL9A1 causes multiple epiphyseal dysplasia: further evidence for locus heterogeneity. Am J Hum Genet. 2001 Nov;69(5):969-80. Epub 2001 Sep 14. PMID:11565064 doi:10.1086/324023
↑Jackson GC, Mittaz-Crettol L, Taylor JA, Mortier GR, Spranger J, Zabel B, Le Merrer M, Cormier-Daire V, Hall CM, Offiah A, Wright MJ, Savarirayan R, Nishimura G, Ramsden SC, Elles R, Bonafe L, Superti-Furga A, Unger S, Zankl A, Briggs MD. Pseudoachondroplasia and multiple epiphyseal dysplasia: a 7-year comprehensive analysis of the known disease genes identify novel and recurrent mutations and provides an accurate assessment of their relative contribution. Hum Mutat. 2012 Jan;33(1):144-57. doi: 10.1002/humu.21611. Epub 2011 Oct 31. PMID:21922596 doi:10.1002/humu.21611
↑Chen H, Deere M, Hecht JT, Lawler J. Cartilage oligomeric matrix protein is a calcium-binding protein, and a mutation in its type 3 repeats causes conformational changes. J Biol Chem. 2000 Aug 25;275(34):26538-44. PMID:10852928 doi:10.1074/jbc.M909780199
↑Thur J, Rosenberg K, Nitsche DP, Pihlajamaa T, Ala-Kokko L, Heinegard D, Paulsson M, Maurer P. Mutations in cartilage oligomeric matrix protein causing pseudoachondroplasia and multiple epiphyseal dysplasia affect binding of calcium and collagen I, II, and IX. J Biol Chem. 2001 Mar 2;276(9):6083-92. Epub 2000 Nov 17. PMID:11084047 doi:10.1074/jbc.M009512200
↑Briggs MD, Hoffman SM, King LM, Olsen AS, Mohrenweiser H, Leroy JG, Mortier GR, Rimoin DL, Lachman RS, Gaines ES, et al.. Pseudoachondroplasia and multiple epiphyseal dysplasia due to mutations in the cartilage oligomeric matrix protein gene. Nat Genet. 1995 Jul;10(3):330-6. PMID:7670472 doi:https://dx.doi.org/10.1038/ng0795-330
↑Susic S, McGrory J, Ahier J, Cole WG. Multiple epiphyseal dysplasia and pseudoachondroplasia due to novel mutations in the calmodulin-like repeats of cartilage oligomeric matrix protein. Clin Genet. 1997 Apr;51(4):219-24. PMID:9184241
↑Briggs MD, Mortier GR, Cole WG, King LM, Golik SS, Bonaventure J, Nuytinck L, De Paepe A, Leroy JG, Biesecker L, Lipson M, Wilcox WR, Lachman RS, Rimoin DL, Knowlton RG, Cohn DH. Diverse mutations in the gene for cartilage oligomeric matrix protein in the pseudoachondroplasia-multiple epiphyseal dysplasia disease spectrum. Am J Hum Genet. 1998 Feb;62(2):311-9. PMID:9463320 doi:10.1086/301713
↑Ikegawa S, Ohashi H, Nishimura G, Kim KC, Sannohe A, Kimizuka M, Fukushima Y, Nagai T, Nakamura Y. Novel and recurrent COMP (cartilage oligomeric matrix protein) mutations in pseudoachondroplasia and multiple epiphyseal dysplasia. Hum Genet. 1998 Dec;103(6):633-8. PMID:9921895
↑Loughlin J, Irven C, Mustafa Z, Briggs MD, Carr A, Lynch SA, Knowlton RG, Cohn DH, Sykes B. Identification of five novel mutations in cartilage oligomeric matrix protein gene in pseudoachondroplasia and multiple epiphyseal dysplasia. Hum Mutat. 1998;Suppl 1:S10-7. PMID:9452026
↑Jackson GC, Mittaz-Crettol L, Taylor JA, Mortier GR, Spranger J, Zabel B, Le Merrer M, Cormier-Daire V, Hall CM, Offiah A, Wright MJ, Savarirayan R, Nishimura G, Ramsden SC, Elles R, Bonafe L, Superti-Furga A, Unger S, Zankl A, Briggs MD. Pseudoachondroplasia and multiple epiphyseal dysplasia: a 7-year comprehensive analysis of the known disease genes identify novel and recurrent mutations and provides an accurate assessment of their relative contribution. Hum Mutat. 2012 Jan;33(1):144-57. doi: 10.1002/humu.21611. Epub 2011 Oct 31. PMID:21922596 doi:10.1002/humu.21611
↑Hecht JT, Nelson LD, Crowder E, Wang Y, Elder FF, Harrison WR, Francomano CA, Prange CK, Lennon GG, Deere M, et al.. Mutations in exon 17B of cartilage oligomeric matrix protein (COMP) cause pseudoachondroplasia. Nat Genet. 1995 Jul;10(3):325-9. PMID:7670471 doi:https://dx.doi.org/10.1038/ng0795-325
↑Susic S, Ahier J, Cole WG. Pseudoachondroplasia due to the substitution of the highly conserved Asp482 by Gly in the seventh calmodulin-like repeat of cartilage oligomeric matrix protein. Hum Mutat. 1998;Suppl 1:S125-7. PMID:9452063
↑Unger S, Korkko J, Krakow D, Lachman RS, Rimoin DL, Cohn DH. Double heterozygosity for pseudoachondroplasia and spondyloepiphyseal dysplasia congenita. Am J Med Genet. 2001 Nov 22;104(2):140-6. PMID:11746045
↑Mabuchi A, Haga N, Ikeda T, Manabe N, Ohashi H, Takatori Y, Nakamura K, Ikegawa S. Novel mutation in exon 18 of the cartilage oligomeric matrix protein gene causes a severe pseudoachondroplasia. Am J Med Genet. 2001 Nov 22;104(2):135-9. PMID:11746044
↑Chen FH, Thomas AO, Hecht JT, Goldring MB, Lawler J. Cartilage oligomeric matrix protein/thrombospondin 5 supports chondrocyte attachment through interaction with integrins. J Biol Chem. 2005 Sep 23;280(38):32655-61. Epub 2005 Jul 28. PMID:16051604 doi:10.1074/jbc.M504778200
↑Koelling S, Clauditz TS, Kaste M, Miosge N. Cartilage oligomeric matrix protein is involved in human limb development and in the pathogenesis of osteoarthritis. Arthritis Res Ther. 2006;8(3):R56. Epub 2006 Mar 15. PMID:16542502 doi:10.1186/ar1922
↑Gagarina V, Carlberg AL, Pereira-Mouries L, Hall DJ. Cartilage oligomeric matrix protein protects cells against death by elevating members of the IAP family of survival proteins. J Biol Chem. 2008 Jan 4;283(1):648-59. Epub 2007 Nov 8. PMID:17993464 doi:10.1074/jbc.M704035200
↑Tan K, Duquette M, Joachimiak A, Lawler J. The crystal structure of the signature domain of cartilage oligomeric matrix protein: implications for collagen, glycosaminoglycan and integrin binding. FASEB J. 2009 Aug;23(8):2490-501. Epub 2009 Mar 10. PMID:19276170 doi:10.1096/fj.08-128090
