In Trimeric G Proteins,GTP Binds To

Question

In trimeric G proteins,GTP binds to:
A)the α subunit.
B)the β subunit.
C)the γ subunit.
D)the activated trimer.

Accepted Answer

GTP binds to the alpha subunit of the trimeric G proteins and makes it active, leading to downstream signaling events. The beta and gamma subunits stay together as a complex and are involved in the activation of downstream effector proteins. The activated trimer is formed when GTP is bound to the alpha subunit, but this is not the primary binding site for GTP.