Ste5 binds to MAPKKK,MAPKK,and MAPK to organize the kinase cascade.What type of signaling molecule is Ste5?
A)Scaffold
B)Adapter protein
C)Second messenger
D)Enzyme

Question

Quizplus · Accepted Answer

Ste5 is a scaffold protein as it plays a structural role in organizing the kinase cascade by bringing together MAPKKK, MAPKK, and MAPK. Scaffold proteins do not have enzymatic activity and do not directly participate in signaling, but rather facilitate and enhance signaling processes by promoting the formation of signaling complexes.

Ste5 Binds to MAPKKK,MAPKK,and MAPK to Organize the Kinase Cascade