A common amino acid motif found in many of the polypeptides that function as repressors is

Question

Quizplus · Accepted Answer

The helix-turn-helix motif is a common amino acid motif found in many of the polypeptides that function as repressors. This motif consists of two alpha helices connected by a short turn, with the second helix interacting with the DNA to bind the repressor to its target site. The leucine zipper motif and the helix-loop-helix motif are also involved in protein-protein interactions and DNA binding, but they are more commonly found in transcription factors and activators. The zinc finger motif is a common DNA-binding domain found in a wide variety of proteins, including transcription factors and repressors, but it is not specifically associated with repressor function.

A Common Amino Acid Motif Found in Many of the Polypeptides