Cyclase
# Cyclase

A cyclase is an enzyme, almost always a lyase, that catalyzes a chemical reaction to form a cyclic compound. Important cyclase enzymes include:

* Adenylyl cyclase, which forms cyclic AMP from adenosine triphosphate (EC 4.6.1.1)
   * ADCY1
   * ADCY2
   * ADCY3
   * ADCY4
   * ADCY5
   * ADCY6
   * ADCY7
   * ADCY8
   * ADCY9
   * ADCY10
* Guanylyl cyclase, which forms cyclic GMP from guanosine triphosphate (EC 4.6.1.2)
   * GUCY1A2
   * GUCY1A3
   * GUCY1B3
   * Guanylate cyclase 2C
   * Guanylate cyclase 2D
   * Guanylate cyclase 2F
   * NPR1
   * NPR2
* Protein cyclase, a ligase enzyme that produces backbone-cyclised proteins by intramolecular transpeptidation
