Gene

COL9A1

Species
Homo sapiens
Symbol
COL9A1
Name
collagen type IX alpha 1 chain
Synonyms
  • alpha-1(IX) collagen chain
  • cartilage-specific short collagen
Biotype
protein coding gene
Automated Description
Enables carbohydrate binding activity and protein homodimerization activity. Predicted to be involved in extracellular matrix organization. Predicted to act upstream of or within chondrocyte proliferation; growth plate cartilage development; and tissue homeostasis. Located in collagen-containing extracellular matrix. Part of collagen type IX trimer. Implicated in Stickler syndrome; multiple epiphyseal dysplasia 6; and osteochondrodysplasia.
RGD Description
This gene encodes one of the three alpha chains of type IX collagen, which is a minor (5-20%) collagen component of hyaline cartilage. Type IX collagen is usually found in tissues containing type II collagen, a fibrillar collagen. Studies in knockout mice have shown that synthesis of the alpha 1 chain is essential for assembly of type IX collagen molecules, a heterotrimeric molecule, and that lack of type IX collagen is associated with early onset osteoarthritis. Mutations in this gene are associated with osteoarthritis in humans, with multiple epiphyseal dysplasia, 6, a form of chondrodysplasia, and with Stickler syndrome, a disease characterized by ophthalmic, orofacial, articular, and auditory defects. Two transcript variants that encode different isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]
Cross References
Additional Information
Literature

Orthology

Gene tree
PANTHER:PTHR24023
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Paralogy

Function - GO Annotations

Pathways

No data available

Phenotypes

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    Disease Associations

    Cases where the expected disease association was NOT found
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    Alleles and Variants

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      Transgenic Alleles

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      (carrying the transgene)
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        Models

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          Sequence Feature Viewer

          Genome location
          Assembly version
          GRCh38
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          Sequence Details

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          Expression

          Primary Sources
          None
          Other Sources
          Cell color indicative of annotation volume; red slash indicates species lacks structure or developmental stage.

          Molecular Interactions

          COL9A1 molecule type
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            Genetic Interactions

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