Final answer:
Collagen is the main protein in connective tissue, providing structural framework and flexibility. It can form triple helical structures known as fibrils. Malfunctions of collagen can result in disorders like Ehlers-Danlos syndrome.
Step-by-step explanation:
Characteristics of collagen include its role as the main protein of connective tissue in animals and being the most abundant protein in mammals. Collagen serves several functions: it provides a structural framework, malfunctions can lead to disorders, and not all collagen forms fibrils. The organic matrix material of connective tissue is strengthened and given flexibility by the collagen fibers.
In terms of structure, most collagens are triple helical, forming a thread-like structure known as a fibril. These fibrils are made of three polypeptide chains, rich in glycine and proline amino acids, which allow for the structure's strength and rigidity. Furthermore, the synthesis and structure of collagen involve enzymes and cofactors for posttranslational modifications that can affect the integrity and function of collagen tissue.
Some common disorders associated with collagen malfunction include Ehlers-Danlos syndrome, which can lead to progressive deterioration of collagens in various sites such as joints and arterial walls.