Reaction: 6-phospho-D-gluconate + NAD(P)+ = D-ribulose 5-phosphate + CO2 + NAD(P)H + H+
For diagram of reaction click here.
Systematic name: 6-phospho-D-gluconate:NAD(P)+ 2-oxidoreductase (decarboxylating)
Comments: The enzyme participates in the oxidative branch of the pentose phosphate pathway, whose main purpose is to produce reducing power and pentose for biosynthetic reactions. Unlike EC 126.96.36.199, phosphogluconate dehydrogenase (NADP+-dependent, decarboxylating), it is not specific for NADP+ and can accept both cofactors with similar efficiency. cf. EC 188.8.131.523, phosphogluconate dehydrogenase [NAD+-dependent, decarboxylating].
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:
1. Ben-Bassat, A. and Goldberg, I. Purification and properties of glucose-6-phosphate dehydrogenase (NADP+/NAD+) and 6-phosphogluconate dehydrogenase (NADP+/NAD+) from methanol-grown Pseudomonas C. Biochim. Biophys. Acta 611 (1980) 1-10. [PMID: 7350909]
2. Stournaras, C., Maurer, P. and Kurz, G. 6-phospho-D-gluconate dehydrogenase from Pseudomonas fluorescens. Properties and subunit structure. Eur. J. Biochem. 130 (1983) 391-396. [PMID: 6402366]
3. Levy, H.R., Vought, V.E., Yin, X. and Adams, M.J. Identification of an arginine residue in the dual coenzyme-specific glucose-6-phosphate dehydrogenase from Leuconostoc mesenteroides that plays a key role in binding NADP+ but not NAD+. Arch. Biochem. Biophys. 326 (1996) 145-151. [PMID: 8579362]