Definition of "cyclase" []

• An enzyme that acts as a catalyst in the cyclization of a compound. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "When guanylyl cyclase is activated, it starts to produce cyclic GMP from GTP."
• "a specific isoform of cyclic GMP phosphodiesterase and allowing cyclic GMP to accumulate when guanylate cyclase is activated by nitric oxide released from the nerves innervating the erectile tissue."
• "Cyclic AMP is synthesised from ATP via the enzyme adenylyl cyclase, which is in turn activated by G-proteins coupled to the V2 receptors."