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Cyclic guanosine monophosphate (cGMP) is a cyclic nucleotide derived from guanosine triphosphate (GTP). cGMP acts as a second messenger much like cyclic AMP. Its most likely mechanism of action is activation of intracellular protein kinases in response to the binding of membrane-impermeable peptide hormones to the external cell surface. [1]
In mammalian cells, cGAMP is synthesized by cyclic GMP-AMP synthase from ATP and GTP upon cytosolic DNA stimulation. [2] cGAMP produced by cGAS contains mixed phosphodiester linkages, with one between 2'-OH of GMP and 5'-phosphate of AMP and the other between 3'-OH of AMP and 5'-phosphate of GMP. [3] [4] [5] [6]
Guanosine monophosphate (GMP), also known as 5′-guanidylic acid or guanylic acid (conjugate base guanylate), is a nucleotide that is used as a monomer in RNA. It is an ester of phosphoric acid with the nucleoside guanosine. GMP consists of the phosphate group, the pentose sugar ribose, and the nucleobase guanine; hence it is a ribonucleotide ...
8-Bromoguanosine 3′,5′-cyclic monophosphate is a brominated derivative of cyclic guanosine monophosphate (cGMP). [1] It acts as an activator of cGMP-dependent protein kinases . [ 2 ]
Cyclic GMP-AMP (cGAMP) is a cyclic dinucleotide (CDN) and the first to be found in metazoans. Other CDNs (c-di-GMP and c-di-AMP) are commonly found in bacteria, archaea, and protozoa. As the name suggests, cGAMP is cyclic molecule composed of one Adenine monophosphate (AMP) and one Guanine monophosphate (GMP) connected by two phosphodiester bonds.
The enzyme 3′,5′-cyclic-GMP phosphodiesterase (EC 3.1.4.35) catalyzes the reaction guanosine 3′,5′-cyclic phosphate + H 2 O ⇌ {\displaystyle \rightleftharpoons } guanosine 5′-phosphate This enzyme belongs to the family of hydrolases , specifically those acting on phosphoric diester bonds.
Guanylate cyclase (EC 4.6.1.2, also known as guanyl cyclase, guanylyl cyclase, or GC; systematic name GTP diphosphate-lyase (cyclizing; 3′,5′-cyclic-GMP-forming)) is a lyase enzyme that converts guanosine triphosphate (GTP) to cyclic guanosine monophosphate (cGMP) and pyrophosphate: [1]
Cyclic adenosine monophosphate.The cyclic portion refers to the two single bonds between the phosphate group and the ribose. A cyclic nucleotide (cNMP) is a single-phosphate nucleotide with a cyclic bond arrangement between the sugar and phosphate groups.