Collagen can be considerable in corneas, blood vessels, the intestine, intervertebral discs, and the dentin in enamel.[3] In muscle tissue, it serves as a serious part of the endomysium. Collagen constitutes one to 2 p.c of muscle tissue and accounts for six% of the load of robust, tendinous muscular tissues.[4] The fibroblast is the most typical cell that creates collagen. Relying upon the diploma of mineralization, collagen tissues could also be inflexible (bone) or compliant (tendon) or have a gradient from inflexible to compliant (cartilage).
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Etymology[edit]
The identify collagen comes from the Greek κόλλα (kólla), which means “glue”, and suffix -γέν, -gen, denoting “producing”.[6][7]
Human sorts[edit]
The 5 commonest sorts are:[11]
Medical makes use of[edit]
All through the 4 phases of wound therapeutic, collagen performs the next capabilities in wound therapeutic:
Fundamental analysis[edit]
Collagen is utilized in laboratory research for cell tradition, finding out cell habits and mobile interactions with the extracellular setting.[25]
Biology[edit]
The most typical motifs within the amino acid sequence of collagen are glycine-proline-X and glycine-X-hydroxyproline, the place X is any amino acid aside from glycine, proline or hydroxyproline. The collagen protein consists of a triple helix, which typically consists of two similar chains (α1) and an extra chain that differs barely in its chemical composition (α2).[26] The amino acid composition of collagen is atypical for proteins, notably with respect to its excessive hydroxyproline content material. The typical amino acid composition for fish and mammal pores and skin is given.[27]
Synthesis[edit]
Many micro organism and viruses secrete virulence elements, such because the enzyme collagenase, which destroys collagen or interferes with its manufacturing.