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cAMP is 3’5’-cyclic adenosine monophosphate, cGMP is 3’5’-cyclic guanosine monophosphate, cCMP is cytidine 3',5'-monophosphate, and cUMP is uridine 3',5'-cyclic phosphate. [4] [5] Each cyclic nucleotide has three components. It contains a nitrogenous base (meaning it contains nitrogen): for example, adenine in cAMP and guanine in cGMP.
cAMP represented in three ways Adenosine triphosphate. Cyclic adenosine monophosphate (cAMP, cyclic AMP, or 3',5'-cyclic adenosine monophosphate) is a second messenger, or cellular signal occurring within cells, that is important in many biological processes. cAMP is a derivative of adenosine triphosphate (ATP) and used for intracellular signal transduction in many different organisms ...
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]
A stimulant, atrial natriuretic factor (ANF) increases cGMP production in the kidneys, which increases function of the glomerulus by a combination of relaxing and contracting arterioles. [14] Differences between retinal and renal cDNA have been implicated in the functional differences between CNG channels in these two tissues. [3]
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]
Inhibitors of PDE can prolong or enhance the effects of physiological processes mediated by cAMP or cGMP by inhibition of their degradation by PDE. [13] Sildenafil (Viagra) is an inhibitor of cGMP-specific phosphodiesterase type 5, which enhances the vasodilatory effects of cGMP in the corpus cavernosum and is used to treat erectile dysfunction.
cAMP and cAMP-inhibited cGMP 3',5'-cyclic phosphodiesterase 10A is an enzyme that in humans is encoded by the PDE10A gene. [ 5 ] [ 6 ] Various cellular responses are regulated by the second messengers cAMP and cGMP .
Examples include ribonucleoside 2',3'-cyclic monophosphates which are isolatable intermediates, and ribonucleoside 3'-monophosphates which are end products of the hydrolysis of RNA by certain ribonucleases. Other variations include adenosine 3',5'-cyclic monophosphate (cAMP) and guanosine 3',5'-cyclic monophosphate (cGMP). [4]