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FLASH GENE
Symbol COL2A1 contributors: shn/npt - updated : 23-11-2014
HGNC name collagen, type II, alpha 1
HGNC id 2200
Corresponding disease
ACG2 achondrogenesis type II
ANFH avascular necrosis of femoral head, primary
CDMT Czech dysplasia metatarsal type
KND Kniest spondyloepiphyseal dysplasia
NSED spondyloepiphyseal dysplasia, mild, Namaqualand type
OAP osteoarthrosis, precocious
PLSDT platyspondylic lethal skeletal dysplasia
RGRD rhegmatogenous retinal detachment
SEDC spondyloepiphyseal dysplasia, congenital
SEMD1 spondyloepimetaphyseal dysplasia congenita, Strudwick type
SPPD spondyloperipheral dysplasia
STL1 Stickler syndrome type I
Location 12q13.11      Physical location : 48.366.748 - 48.398.285
Synonym name
  • collagen, type II, alpha 1 (primary osteoarthritis, spondyloepiphyseal dysplasia, congenital)
  • collagen, type II, alpha 1, chondrocalcin
  • collagen alpha-1
  • cartilage collagen
  • chondrocalcin
  • Synonym symbol(s) AOM, COL11A3, MGC131516
    DNA
    TYPE functioning gene
    STRUCTURE 31.54 kb     54 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Promoter
    Binding site   enhancer   transcription factor
    text structure
  • SP1 and SP3 sites
  • 3prime UTR has a potent enhancer function which recruits LEF1, upregulating COL2A1 expression in primary chondrocytes
  • an enhancer domain that is responsible for the regulation of its expression level
  • promoter of the type II collagen (COL2A1) gene, encoding the extracellular matrix protein type II collagen, is specifically regulated by TFAP2E
  • MAPPING cloned Y linked Y status confirmed
    Map cen - D12S85 - D12S1701 - COL2A1 - D12S1661 - D12S2196 - qter
    RNA
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    53 splicing 4880 134.4 1418 cartilage and the vitreous humor of the eye - 18023161
  • type IIB procollagen synthesized by differentiated chondrocytes
  • 54 splicing 5087 141.8 1487 cartilage and the vitreous humor of the eye - 18023161
  • type IIA procollagen synthesized by chondroprogenitor cells
  • - splicing - - - during chondrocyte differentiation of bone marrow-derived mesenchymal stem cells (MSCs) - 18023161
  • contains only the first 34 nucleotides of exon 2 by the use of an alternative 5prime splice site, resulting in a premature termination codon and possible nonsense-mediated decay of IIC mRNA
  • - splicing - - - co-expressed with the IIA isoform during chondrogenesis - 18023161
  • use of another 5prime alternative splice site in intron 2
  • contains exon 2 plus 3 nucleotides, resulting in the insertion of an additional amino acid
  • EXPRESSION
    Type
    constitutive of
       expressed in (based on citations)
    organ(s)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Hearing/Equilibriumearinner   
    Visualeye    
    tissue
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Connectivebone   
    Connectivecartilagehyaline  
    cell lineage
    cell lines
    fluid/secretion
    at STAGE
    physiological period fetal
    Text cochlea
    PROTEIN
    PHYSICAL PROPERTIES
    STRUCTURE
    motifs/domains
  • globular N and C termini
  • a large triple helical domain
  • a VWF type C domain
  • conjugated GlycoP
    mono polymer homomer , trimer
    isoforms Precursor preproprotein
    HOMOLOGY
    interspecies ortholog to Col2a1, Rattus norvegicus
    ortholog to Col2a1, Mus musculus
    ortholog to COL2A1, Pan troglodytes
    Homologene
    FAMILY
  • fibrillar collagen family
  • CATEGORY structural protein
    SUBCELLULAR LOCALIZATION extracellular
    text extracellular matrix component, ocular vitreous body
    basic FUNCTION
  • involved in the stucture of cartilage collagen
  • SOX8 expression is regulated by SOX9, and both together with SOX5 and SOX6 are required as a SOX quartet for transcription of COL2A1 and a large number of other chondrogenic molecules
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS development
    text cartilage eye
    PATHWAY
    metabolism
    signaling sensory transduction/hearing
    a component
  • constituent of fibril forming collagen COL2 (homotrimeric)
  • INTERACTION
    DNA
    RNA
    small molecule
  • HLA-DR molecules
  • protein
  • fibronectin, FN1 (Glant et al, 1985)
  • decorin, DCN (Fleischmajer et al, 1991)
  • annexin A5, ANXA5 (Kirsch et al, 1992)
  • RGD-containing collagen-associated protein, RGD-CAP (Hashimoto et al, 1997)
  • Cartilage oligomeric matrix protein, COMP (Rosenberg et al, 1998)
  • TGF-beta1 and BMP-2 (Zhu et al, 1999)
  • Cartilage matrix protein, CMP (Makihira et al, 1999)
  • chondroadherin, CHAD (Mansson et al, 2001)
  • collagen IX, COL9A1 (Fertala et al, 2001)
  • proline arginine-rich end leucine-rich repeat protein, PRELP (Bengtsson et al, 2002)
  • keratinocyte growth factor, KGF (Ruehl et al, 2002)
  • SCX and TCF3 might modulate the primary chondrogenesis by associating with the SOX9-related transcriptional complex, and by binding to the conserved E-box on COL2A1 promoter
  • MYOCD suppresses SOX9-mediated chondrogenic gene COL2A1 expression
  • cell & other
    REGULATION
    activated by SP1
    Other SP3 repressing the SP1 mediated transactivation of COL2A1
    ASSOCIATED DISORDERS
    corresponding disease(s) ACG2 , STL1 , KND , NSED , OAP , SEDC , SEMD1 , SPPD , PLSDT , ANFH , RGRD , CDMT
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral somatic mutation      
    in chondrosarcoma
    Susceptibility
  • risk factor for radiological osteoarthritis
  • to myopia
  • Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS
  • mice expressing the minigene COL2A1 partially deleted developed a phenotype of a chondrodysplasia with dwarfism, short and thick limbs, a short snout, a cranial bulge, a cleft palate, and delayed mineralization of bone (Vandenberg et al, 1991)
  • transgenic mice with an inactivated Col2a1 exhibit highly disorganized chondrocytes with a complete lack of extracellular fibrils ans they have no endochondrial bone or epiphyseal growth plate in long bones (Li et al, 1995)
  • mouse harbouring Arg789Cys mutation has very short limbs, short trunk, short snout, and cleft palate, growth plates are disorganized, collagen fibrils are sparse in cartilage matrix and it die at birth (Gaiser et al, 2002)
  • mutation in the mouse Col2a1 gene leads to spondyloepiphyseal dysplasia congenita, hearing loss, and retinoschisis (Donahue et al, 2003)
  • ENU mouse model with a Ser1386Pro mutation of the Col2a1 C-propeptide domain resulting in abnormal collagen processing and phenotypic features consistent with SEDC and secondary osteoarthritis