Collagen The major structural protein in the human body. Collagen forms the long fibers that are the underlying structure in connective tissue, such as cartilage, skin and bone. There are many types of collagen in the human body. Defects of type 1 collagen are known to cause OI.


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Collagen: A polypeptide substance comprising about one third of the total protein in mammalian organisms. It is the main constituent of Skin; Connective Tissue; and the organic substance of bones (Bone And Bones) and teeth (Tooth).2

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Collagen: A family of large fibrous proteins that are the main components of connective tissue and are responsible for maintaining tissue structure.3


Types may include:4

Types of Collagen:

  • Beta Isomer of C-Terminal Telopeptide of Type I Collagen
  • COL18A1 Gene Product
  • Collagen Alpha-1 II Chain
  • Collagen Alpha-1 VII Chain
  • Collagen Alpha-1 XI Chain
  • Collagen I Alpha-1
  • Collagen I Alpha-2
  • Collagen-IV
  • Collagen IV Alpha-3
  • Collagen IV Alpha-5 Chain
  • Collagen IV Alpha-6
  • C-Terminal Telopeptide Type I Collagen
  • CTX
  • N-Telopeptide
  • Procollagen Type I C-Terminal Peptide
  • Procollagen Type I N-Terminal Peptide
  • Tumstatin
  • Type I Collagen
  • Type III Procollagen N-Terminal Peptide

Categories for Collagen

Category of Collagen:

  • Extracellular Matrix Protein

Anatomy Articles

Read about these related anatomy topics:

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  1. Source: RDCRN (NCATS/NIH): cms/ bbd/ Learn-More/ Glossary
  2. Source: MeSH (U.S. National Library of Medicine)
  3. Source: NCI Thesaurus
  4. ibid.
  5. ibid.

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