IUBMB Enzyme Nomenclature


Accepted name: ribulose-1,5-bisphosphate 5-phosphatase

Reaction: D-ribulose-1,5-bisphosphate + H2O = D-ribulose 1-phosphate + phosphate

Other name(s): RuBP 5-phosphatase

Systematic name: D-ribulose-1,5-bisphosphate 5-phosphohydrolase

Comments: The enzyme, characterized from the halophilic archaeon Halopiger xanaduensis, participates in a non-carboxylating pentose bisphosphate pathway for nucleoside degradation, which is found in some halophilic archaea. The enzyme requires both monovalent and divalent ions for optimal activity.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Sato, T., Utashima, S.H., Yoshii, Y., Hirata, K., Kanda, S., Onoda, Y., Jin, J.Q., Xiao, S., Minami, R., Fukushima, H., Noguchi, A., Manabe, Y., Fukase, K. and Atomi, H. A non-carboxylating pentose bisphosphate pathway in halophilic archaea. Commun Biol 5 (2022) 1290. [PMID: 36434094]

[EC created 2022]

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