II. The fibrous vertebrate bodies, so the a-collagen helix, the basic secondary
ID: 147206 • Letter: I
Question
II. The fibrous vertebrate bodies, so the a-collagen helix, the basic secondary st polypeptide chain, is arguably the most plentiful protein helix structure in the body. The a-collagen helix, connective tissue protein collagen makes up about one-third of the dry protein weight of ructure assumed by an a-collagen which is left-handed, is composed of a repeating sequence of gly-X-pro or gly-X-4-hyp, and has an axial translation of 0.29 nm and an angular rotation of 109° I. How many residues are in one complete turn of the -collagen helix? 2. What is the pitch (rise) of one complete turn of the a-collagen helix?Explanation / Answer
Answer- (I) total of 3.3 amino acid residues are in one complete turn of alpha helix of collagen.
(II)pitch of each rasidue is 0.29nm so pitch of one complete turn of alpha helix of collagen equal to 0.29×3.3=0.97nm so about 10A°