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Symbol COMP contributors: mct/npt/pgu - updated : 22-06-2015
HGNC name cartilage oligomeric matrix protein
HGNC id 2227
Corresponding disease
EDM1 epiphyseal dysplasia multiple 1
PSACH pseudoachondroplasia
Location 19p13.11      Physical location : 18.893.583 - 18.902.114
Synonym name
  • thrombospondin 5
  • cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia 1, multiple)
  • Synonym symbol(s) THBS5, MED, EPD1, MGC131819, MGC149768, TSP5
    TYPE functioning gene
    STRUCTURE 8.53 kb     19 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Promoter
    motif repetitive sequence   triplet
    text structure
  • a minimal negative regulatory element (NRE) that is both necessary and sufficient to repress its promoter
  • elements required for chondrocyte-specific expression lie within 375 bp of the translational start site, while DNA enhancer elements are located between 1.0 to 1.7 kb
  • MAPPING cloned Y linked N status confirmed
    Physical map
    LOC388516 19 LOC388516 KIAA1683 19p13.1 KIAA1683 JUND 19p13.1 jun D proto-oncogene LSM4 19p13.1 LSM4 homolog, U6 small nuclear RNA associated (S. cerevisiae) PGPEP1 19p13.11 pyroglutamyl-peptidase I PLAB MGC10812 19p13.11 hypothetical protein MGC10812 LOC388517 19 similar to MOST-1 protein MAPA 19p13.11 monocyte and plasmacytoid activated molecule SSBP4 19p13.1 single stranded DNA binding protein 4 ISYNA1 19p13.11 myo-inositol 1-phosphate synthase A1 DKFZp434I1916 ELL 19p13.1 elongation factor RNA polymerase II FKBP8 19p12 FK506 binding protein 8, 38kDa MGC2749 19p13.11 hypothetical protein MGC2749 UBA52 19p13.1-p12 ubiquitin A-52 residue ribosomal protein fusion product 1 FLJ20850 19p13.11 hypothetical protein FLJ20850 CRLF1 19p12 cytokine receptor-like factor 1 C19orf4 19p12 chromosome 19 open reading frame 4 FLJ11078 19p13.11 hypothetical protein FLJ11078 MECT1 19p13 mucoepidermoid carcinoma translocated 1 COMP 19p13.1 cartilage oligomeric matrix protein (pseudoachondroplasia, epiphyseal dysplasia 1, multiple) RENT1 19p13.2-p13.11 regulator of nonsense transcripts 1 GDF1 19p13.1-p12 growth differentiation factor 1 LASS1-GDF1 19p12 LAG1 longevity assurance homolog 1 (S. cerevisiae), growth differentiation factor 1 transcription unit LASS1 19p13.1-p12 LAG1 longevity assurance homolog 1 (S. cerevisiae) LOC388518 19 LOC388518 COPE 19p13.1 coatomer protein complex, subunit epsilon DDX49 19p12 DEAD (Asp-Glu-Ala-Asp) box polypeptide 49 HOMER3 19p13.11 homer homolog 3 (Drosophila) SFRS14 19p12-p11 splicing factor, arginine/serine-rich 14 MGC19595 19p13.11 hypothetical gene MGC19595 MGC26694 19p13.11 hypothetical protein MGC26694 FLJ20422 19p13.11 hypothetical protein FLJ20422 MEF2B 19p12 MADS box transcription enhancer factor 2, polypeptide B (myocyte enhancer factor 2B) RFXANK 19p12 regulatory factor X-associated ankyrin-containing protein TRA16 19p13.11 TR4 orphan receptor associated protein TRA16 CSPG3 19p12 chondroitin sulfate proteoglycan 3 (neurocan)
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    19 - 2471 - 757 - 2007 17588949
    Type widely
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Cardiovascularvessel     Homo sapiensAdult
    Skeletonappendicular skeletonjointsynovia highly
    Visualeyeanterior segmentcornea  
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Connectivecartilage    Homo sapiensAdult
    Connectivedensetendon highly
    Connectivedenseligament highly
    SystemCellPubmedSpeciesStageRna symbol
    cell lineage
    cell lines
    at STAGE
  • N-terminal aliphatic residues dictate the structure, stability, assembly, and small molecule binding of the coiled-coil region
  • a signal peptide
  • thrombospondin type 2 and 3 repeats, lacking the procollagen homology domain and seven type III repeats (TSP) of THBS1
  • four coiled-coil type II (EGF-like)
  • type III calmodulin-like (Ca++ binding) repeats, including a very short triplet repeat, encoding five Asp (GAC5) slightly expanded in some patients
  • conjugated GlycoP
    mono polymer homomer , pentamer
    interspecies homolog to murine Comp
  • thrombospondin family
  • noncollagenous extracellular matrix family
  • CATEGORY adhesion , structural protein
    intracellular,cytoplasm,organelle,endoplasmic reticulum
  • in the extracellular matrix (ECM) of developing and mature cartilage, within and around the tendon, in ligament, synovium and the vitreous of the eye
  • COMP and ECM1 colocalize in the growth plates
  • basic FUNCTION
  • structural protein with modified conformation when calcium is removed
  • playing with MATN3 an important role in matrix assembly
  • may function to stabilize the articular cartilage extracellular matrix by specific cation-dependent interactions with matrix components, including collagen types II and IX, fibronectin, aggrecan, and matrilin-1, -3, and -4
  • may act as the co-factor of the GRN cell surface receptor and may present GRN to its receptor, followed by the activations of GRN-mediated signal transduction and gene regulation pathways
  • playing a role in catalyzing the assembly of collagen, promoting formation of well defined fibrils
  • promotes cell attachment via two independent mechanisms involving cell surface CD47 and alphaVbeta3 integrin (and consequence of cell attachment to COMP is the specific induction of fascin-stabilized actin microspikes) (Rock 2010)
  • pivotal for maintaining the homeostasis of vascular smooth muscle cells (VSMCs)
  • potential novel inhibitor of vascular calcificationand the imbalance between the effects of COMP and BMP2 may provide new insights into the pathophysiology of vascular calcification
  • functions as an adapter protein in human skin, similar to its function in cartilage ECM, by organizing collagen I fibrils into a suprastructure, mainly in the vicinity of anchoring plaques that stabilize the cohesion between the upper dermis and the basement membrane zone
    text human limb development
    a component
  • pentameric approximately 524 kDa multidomain extracellular matrix protein (R
    small molecule metal binding,
  • Ca2+
  • protein
  • interacting with GRN (required for GRN-mediated chondrocyte proliferation, since chondrocyte proliferation induced by GRN is dramatically inhibited by an anti-COMP antibody)
  • ADAMTS12 is a new COMP-interacting and -degrading enzyme and thus may play an important role in the COMP degradation in the initiation and progression of arthritis
  • binding to collagens I and II is enhanced in the presence of Zn2+
  • ADAMTS7 facilitated intimal hyperplasia through degradation of inhibitory matrix protein COMP
  • ECM1 novel COMP-associated partner (EGF domain of COMP and the C-terminus of ECM1 mediate the interaction between them)
  • bound directly to BMP2 through the C-terminus, inhibited BMP2 receptor binding, and blocked BMP2 osteogenic signaling
  • COMP binds to COL12A1 and COL14A1 via their C-terminal collagenous domains, and three proteins codistribute in a characteristic narrow zone in the superficial papillary dermis of healthy human skin
  • ADAMTS7 facilitated vascular smooth muscle cell (VSMC) migration by degrading the extracellular matrix protein COMP and thereby promoted neointima formation following vascular mechanical injury
  • cell & other
    corresponding disease(s) EDM1 , PSACH
    Susceptibility putative susceptibility gene for rheumatoid arthritis
    Variant & Polymorphism
    Candidate gene
    Therapy target