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