Give an example of both fibrous and globular proteins and explain how their structure relates to their unique functions

Question

What will be an ideal response?

Answer 1

Answer: Fibrous proteins such as (silk, collagen, elastin, or keratin) have extensive secondary structure (either helix or b sheet) throughout the molecule that gives them a highly ordered, repetitive structure. Fibrous proteins usually have an extended, filamentous structure. Often multiple proto-filaments will interact to create thicker, stronger filaments. Small hydrophobic amino acids that pack tightly are common in fibrous proteins. In contrast, globular proteins, such as (enzymes, transport proteins, or transmembrane proteins) have extensive tertiary structure wherein β sheets and/or α helices are connected by loops that fold into a compact structure. Globular proteins often have multiple regions, or domains, that have different functions. The diverse shapes of globular proteins create binding pockets for substrates, regions of hydrophobicity that interact with membranes, and other domains that allow globular proteins to act as enzymes, receptors, and a diversity of other functions in the cell.