Cartilage oligomeric matrix protein

Last updated
COMP
Protein COMP PDB 1fbm.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases COMP , EDM1, EPD1, MED, PSACH, THBS5, cartilage oligomeric matrix protein, TSP5, CTS2
External IDs OMIM: 600310; MGI: 88469; HomoloGene: 74; GeneCards: COMP; OMA:COMP - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_000095

NM_016685

RefSeq (protein)

NP_000086

NP_057894

Location (UCSC) Chr 19: 18.78 – 18.79 Mb Chr 8: 70.83 – 70.83 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Cartilage oligomeric matrix protein (COMP), also known as thrombospondin-5, is an extracellular matrix (ECM) protein primarily present in cartilage. In humans it is encoded by the COMP gene. [5] [6] [7]

Contents

Function

The protein encoded by this gene is a noncollagenous extracellular matrix (ECM) protein. [8] It consists of five identical glycoprotein subunits, each with EGF-like and calcium-binding (thrombospondin-like) domains. Oligomerization results from formation of a five-stranded coiled coil and disulfide bonds. Binding to other ECM proteins such as collagen appears to depend on divalent cations. Mutations can cause the osteochondrodysplasias pseudoachondroplasia (PSACH) and multiple epiphyseal dysplasia (MED). [7]

COMP is a marker of cartilage turnover. [9] It is present in high quantities in fibrotic scars and systemic sclerosis, and it appears to have a role in vascular wall remodeling. [10]

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000105664 Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000031849 Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Newton G, Weremowicz S, Morton CC, Copeland NG, Gilbert DJ, Jenkins NA, Lawler J (Dec 1994). "Characterization of human and mouse cartilage oligomeric matrix protein". Genomics. 24 (3): 435–9. doi:10.1006/geno.1994.1649. PMID   7713493.
  6. Briggs MD, Rasmussen IM, Weber JL, Yuen J, Reinker K, Garber AP, Rimoin DL, Cohn DH (Dec 1993). "Genetic linkage of mild pseudoachondroplasia (PSACH) to markers in the pericentromeric region of chromosome 19". Genomics. 18 (3): 656–60. doi:10.1016/S0888-7543(05)80369-6. PMID   8307576.
  7. 1 2 "Entrez Gene: COMP cartilage oligomeric matrix protein".
  8. Paulsson M, Heinegård D (Aug 1981). "Purification and structural characterization of a cartilage matrix protein". The Biochemical Journal. 197 (2): 367–75. doi:10.1042/bj1970367. PMC   1163135 . PMID   7325960.
  9. Petersen SG, Saxne T, Heinegard D, Hansen M, Holm L, Koskinen S, Stordal C, Christensen H, Aagaard P, Kjaer M (Jan 2010). "Glucosamine but not ibuprofen alters cartilage turnover in osteoarthritis patients in response to physical training". Osteoarthritis and Cartilage. 18 (1): 34–40. doi: 10.1016/j.joca.2009.07.004 . PMID   19679221.
  10. Halper J, Kjaer M (2014). "Basic Components of Connective Tissues and Extracellular Matrix: Elastin, Fibrillin, Fibulins, Fibrinogen, Fibronectin, Laminin, Tenascins and Thrombospondins". Progress in Heritable Soft Connective Tissue Diseases. Advances in Experimental Medicine and Biology. Vol. 802. pp. 31–47. doi:10.1007/978-94-007-7893-1_3. ISBN   978-94-007-7892-4. PMID   24443019.

Further reading