Purine → [(2R,3S,4R)-5-[(2,5-diamino-4-oxo-1H-pyrimidin-6-yl)amino]-3,4-dihydroxyoxolan-2-yl]methyl dihydrogen phosphate

Participants

Reaction Steps

As noted above, in bacteria and fungi, GTP cyclohydrolase II (EC 3.5.4.25) catalyzes the reaction of GTP with a purine to produce 2,5-Diamino-6-hydroxy-4-(5′phosphoribosylamino)-pyrimidine; diaminohydroxyphosphoribosylaminopyrimidine deaminase (EC 3.5.4.26) catalyzes the reaction of 2,5-Diamino-6-hydroxy-4-(5′phosphoribosylamino)-pyrimidine to produce 5-amino-6-(5-phosphoribosylamino)uracil; 5-amino-6-(5-phosphoribosylamino)uracil reductase (EC 1.1.1.193) catalyzes the reaction of 5-amino-6-(5-phosphoribosylamino)uracil to produce 5-Amino-6-(5′phosphoribitylamino)uracil; lumazine synthase catalyzes the reaction of 5-Amino-6-(5′phosphoribitylamino)uracil to produce 6,7-Dimethyl-8-ribityl lumazine; and riboflavin synthase (EC 2.5.1.9) catalyzes the reaction of 6,7-Dimethyl-8-ribityl lumazine to produce riboflavin

Provenance & Evidence