Q. 16.19 - An Introduction to General, Organic, and Biological Chemistry

Question

What is the difference in hydrogen bonding between an $\alpha$ helix and a $\beta$-pleated sheet?

Step-by-Step Solution

Answer

In the a-helix structure the hydrogen bond is formed between the oxygen atom of the carbonyl group $(\mathrm{C}=\mathrm{O})$ and the hydrogen of the amine group $(\mathrm{N}-\mathrm{H})$in the next turn of the helical chain.

 In $\beta$-plated sheet the hydrogen bond is formed between the oxygen atom of the carbonyl group $(C=O)$ and the hydrogen of the amine group$(N-H)$ in the parallel section of polypeptide chain.

Step 1: Introduction

Amino acids have amine$\left(-{\mathrm{NH}}_2\right)$and carboxylic acid $(-\mathrm{COOH})$ functional groups. The a-carbon is covalently bonded to both functional groups.

Step 2: Explanation

Amino acids comprise an amine$\left(-{\mathrm{NH}}_2\right)$and carboxylic acid $(-\mathrm{COOH})$ functional organization. Both the useful agencies are covalently bonded to the $\alpha -$-carbon. Amino acids are the constructing blocks for all proteins.

 A dipeptide identityentification fashioned while  amino acids go through a response wherein an amide bond is fashioned among the amine organization of 1 amino acid and to the carboxylic organization of different amino acids and that joins the 2 amino acids.

 Proteins are macromolecules made from repeating subunits called amino acids, which decide form and characteristics of protein. 

Step 3: Given information

 In hydrogen bonding between an $\alpha$ helix and a $\beta$-pleated sheet

Step 4: Explanation

In the a-helix structure the hydrogen bond is formed between the oxygen atom of the carbonyl group$(\mathrm{C}=\mathrm{O})$and the hydrogen of the amine group $(\mathrm{N}-\mathrm{H})$ in the next turn of the helical chain.

 In $\beta$-plated sheet the hydrogen bond is formed between the oxygen atom of the carbonyl group $(\mathrm{C}=\mathrm{O})$ and the hydrogen of the amine group $(\mathrm{N}-\mathrm{H})$ in the parallel section of polypeptide chain.