This enzyme, found in NAD supression mutants of?Escherichia coli, synthesizes 5-phospho-¦Á-D-ribose 1-diphosphate (PRPP) without the participation of EC?2.7.6.1, ribose-phosphate diphosphokinase. Ribose, ribose 1-phosphate and ribose 5-phosphate are not substrates, and GTP cannot act as a phosphate donor.
Cofactor
History
Reactions
Atp + alpha-D-ribose 1,5-bisphosphate = adp + 5-phospho-alpha-D-ribose 1-diphosphate.