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Medical Definition of Guanine ribonucleotide
1. A major component of ribonucleic acids. Synonym: guanine ribonucleotide, guanosine 5'-monophosphate. Guanylic acid reductase (GMP reductase), an enzyme that catalyses the reaction of GMP with NADPH producing IMP, NH3, and NADP+; a part of the purine salvage pathway. Guanylic acid synthetase (GMP synthetase), an enzyme catalyzing the reaction of l-glutamine, XMP, and ATP to produce GMP, l-glutamate, AMP, and pyrophosphate; a key step in purine biosynthesis. Acronym: GMP (05 Mar 2000)