Guanylate cyclase is a lyase enzyme. Guanylate cyclase is part of the G protein signaling cascade that is activated by low intracellular calcium levels and inhibited by high intracellular calcium levels. In response to calcium levels guanylyl cyclase synthesizes cGMP from GTP. cGMP keeps cGMP-gated channels open, allowing for the entry of calcium into the cell. Like cAMP, cGMP is an important second messenger that internalizes the message carried by intercellular messengers such as peptide hormones and NO, and can also function as an autocrine signal. Depending on cell type, it can drive adaptive/developmental changes requiring protein synthesis. In smooth muscle, cGMP is the signal for relaxation, and is coupled to many homeostaic mechanisms including regulation of vascular and airway tone, insulin secretion, and peristalsis. Once formed, cGMP can be degraded by phosphodiesterases, which themselves are under different forms of regulation, depending on the tissue.
U.S. National Library of Medicine
An enzyme that catalyzes the conversion of GTP to 3',5'-cyclic GMP and pyrophosphate. It also acts on ITP and dGTP. (From Enzyme Nomenclature, 1992) EC 184.108.40.206.
The numerical value of guanylate cyclase in Chaldean Numerology is: 3
The numerical value of guanylate cyclase in Pythagorean Numerology is: 3
Images & Illustrations of guanylate cyclase
Find a translation for the guanylate cyclase definition in other languages:
Select another language:
Discuss these guanylate cyclase definitions with the community:
Word of the Day
Would you like us to send you a FREE new word definition delivered to your inbox daily?
Use the citation below to add this definition to your bibliography:
"guanylate cyclase." Definitions.net. STANDS4 LLC, 2017. Web. 27 Jul 2017. <http://www.definitions.net/definition/guanylate cyclase>.