Which amino acid is often referred to as a "helix-breaker" due to its absence from $\alpha$-helices but is often found in structures such as $\beta$-turns?
A)Val
B)Met
C)Pro
D)Phe
E)Leu

Question

Quizplus · Accepted Answer

Proline is often referred to as a "helix-breaker" due to its rigid structure and inability to participate in regular alpha-helical structure. It is often found in turns and bends in proteins, such as beta turns. Valine, methionine, phenylalanine, and leucine do not have this characteristic.

Which Amino Acid Is Often Referred to as a "Helix-Breaker α\alphaα

Which Amino Acid Is Often Referred to as a "Helix-Breaker $\alpha$