D-Ribose 1,5-diphosphate (R15P) is a pentaglucose, it plays an important role in the Calvin cycle of photosynthesis[1].
ChEBI: D-ribose 1,5-bisphosphate is a ribose bisphosphate that consists of D-ribose having two monophosphate groups at the 1- and 5-positions. It is functionally related to a D-ribose. It is a conjugate acid of a D-ribose 1,5-bisphosphate(4-).
Ribulose-1,5-bisphosphate (RuBP) is a component of the Calvin cycle th at is metabolized into glycerate 3-phosphate (G3P) by the enzyme ribulose bisphosphate carboxylase/oxygenase (RuBisCO). RuBP is used to identify, differentiate and characterized ribulose bisphosphate carboxylase(s)/oxygenase(s) (RuBisCO).
[1] Nakamura A, et al. Dynamic, ligand-dependent conformational change triggers reaction of ribose-1,5-bisphosphate isomerase from Thermococcus kodakarensis KOD1. J Biol Chem. 2012 Jun 15;287(25):20784-96. DOI:
10.1074/jbc.M112.349423
