Cyclic-guanylate-specific phosphodiesterase (EC 3.1.4.52, cyclic bis(3â²âÂÂ5')diguanylate phosphodiesterase, c-di-GMP-specific phosphodiesterase, c-di-GMP phosphodiesterase, phosphodiesterase, phosphodiesterase A1, PDEA1, VieA) is an enzyme with systematic name cyclic bis(3â²âÂÂ5â²)diguanylate 3-guanylylhydrolase. This enzyme catalyses the following reaction:
This enzyme requires Mg<sup>2+</sup> or Mn<sup>2+</sup> for activity. It is inhibited by Ca<sup>2+</sup> and Zn<sup>2+</sup>.