What is the primary function of fibrous proteins?

Fibrous proteins primarily serve as structural components within various biological systems. These proteins are characterized by their elongated, fibrous shape, which allows them to provide strength, support, and structure to cells and tissues. For example, collagen, a well-known fibrous protein, is crucial for providing structural integrity in connective tissues like tendons and ligaments. Similarly, keratin, another fibrous protein, is important in the formation of hair, nails, and the outer layer of skin.

Their structural role is essential for maintaining the overall architecture of organisms, making them fundamental to the integrity of tissues and organs. Unlike enzymes, which catalyze biochemical reactions, or proteins involved in transport and metabolism, fibrous proteins are primarily involved in providing mechanical support rather than facilitating biological processes directly. This distinction highlights the unique and critical role that fibrous proteins play in the structural framework of living organisms.