The chemical reactions and pathways involving collagen, any of a group of fibrous proteins of very high tensile strength that form the main component of connective tissue in animals. Collagen is highly enriched in glycine (some regions are 33% glycine) and proline, occurring predominantly as 3-hydroxyproline (about 20%).
demethylation +
futile creatine cycle
glycosylation +
hormone metabolic process +
hydrogen metabolic process +
iron-sulfur-molybdenum cofactor metabolic process +