Why is bound GTP considered a "clock"? A) It is always produced and degraded in specific time intervals. B) It is regulated by energy. C) The G _$\alpha$ receptors have intrinsic GTPase activity, hydrolyzing GTP to GDP and P_i. D) It spontaneously hydrolyzes in the binding site of G proteins. E) None of the answers is correct.

Question

Quizplus · Accepted Answer

The intrinsic GTPase activity of G protein-coupled receptors (GPCRs) acts as a "clock" by hydrolyzing bound GTP to GDP, which regulates the timing of signal transduction processes. This hydrolysis effectively turns off the signal transduction pathway, making the duration of the signal dependent on the rate of GTP hydrolysis.

Why Is Bound GTP Considered a "Clock"? A) It Is α\alphaα

Why Is Bound GTP Considered a "Clock"?
A) It Is $\alpha$