Reaction: D-apionate + NAD+ = 3-oxo-D-isoapionate + NADH + H+
Glossary: 3-oxo-D-isoapionate = 2,4-dihydroxy-2-(hydroxymethyl)-3-oxobutanoate
Other name(s): apnO (gene name)
Systematic name: D-apionate:NAD+ oxidoreductase (isomerizing)
Comments: The enzyme, characterized from several bacterial species, participates in the degradation of D-apionate. The reaction involves migration of a hydroxymethyl group from position 3 to position 2 and oxidation of the 3-hydroxyl group.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
1. Carter, M.S., Zhang, X., Huang, H., Bouvier, J.T., Francisco, B.S., Vetting, M.W., Al-Obaidi, N., Bonanno, J.B., Ghosh, A., Zallot, R.G., Andersen, H.M., Almo, S.C. and Gerlt, J.A. Functional assignment of multiple catabolic pathways for D-apiose. Nat. Chem. Biol. 14 (2018) 696-705. [PMID: 29867142]