The biosynthesis of phosphoribosyl pyrophosphate begins with a product of the pentose phosphate, D-ribose 5-phosphate interact with a phosphopentomutase resulting in a Ribose 1-phosphate or it can be phosphorylated through an ATP driven ribose-phosphate diphosphokinase resulting in a release of a hydrogen ion, an AMP and a phosphoribosyl pyrophosphate. The latter compound is then involved in the purine nucleotides de novo biosynthesis pathway. Ribose 1-phosphate can interact spontaneously with ATP resulting in a release of hydrogen ion, ADP and a ribose 1,5-biphosphate. The latter compound is then phosphorylated through a ribose 1,5-bisphosphokinase resulting in the release of ADP and phosphoribosyl pyrophosphate. The latter compound is then involved in the purine nucleotides de novo biosynthesis pathway.

PRPP Biosynthesis References