Adenylyl cyclase converts ATP to the second messenger cAMP at the inner face of the plasma membrane.
A drug that inhibits cAMP phosphodiesterase would most directly cause:
- Acheck_circle
Prolonged activation of protein kinase A
- B
Loss of receptor binding
- C
Decreased cAMP levels
- D
Inhibition of adenylyl cyclase
Explanation
Phosphodiesterase degrades cAMP to AMP, ending the signal. Inhibiting it allows cAMP levels to remain elevated, prolonging PKA activity.