IUBMB Enzyme Nomenclature


Accepted name: 5-formyl-3-hydroxy-2-methylpyridine 4-carboxylic acid 5-dehydrogenase

Reaction: 5-formyl-3-hydroxy-2-methylpyridine-4-carboxylate + NAD+ + H2O = 3-hydroxy-2-methylpyridine-4,5-dicarboxylate + NADH + H+

For diagram of reaction click here.

Other name(s): mlr6793 (locus name)

Systematic name: 5-formyl-3-hydroxy-2-methylpyridine-4-carboxylate:NAD+ 5-oxidoreductase

Comments: The enzyme, characterized from the bacteria Pseudomonas sp. MA-1 and Mesorhizobium loti, participates in the degradation of pyridoxine (vitamin B6).

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


1. Lee, Y.C., Nelson, M.J. and Snell, E.E. Enzymes of vitamin B6 degradation. Purification and properties of isopyridoxal dehydrogenase and 5-formyl-3-hydroxy-2-methylpyridine-4-carboxylic-acid dehydrogenase. J. Biol. Chem 261 (1986) 15106-15111. [PMID: 3533936]

2. Yokochi, N., Yoshikane, Y., Matsumoto, S., Fujisawa, M., Ohnishi, K. and Yagi, T. Gene identification and characterization of 5-formyl-3-hydroxy-2-methylpyridine 4-carboxylic acid 5-dehydrogenase, an NAD+-dependent dismutase. J. Biochem. 145 (2009) 493-503. [PMID: 19218190]

3. Mugo, A.N., Kobayashi, J., Mikami, B., Yoshikane, Y., Yagi, T. and Ohnishi, K. Crystal structure of 5-formyl-3-hydroxy-2-methylpyridine 4-carboxylic acid 5-dehydrogenase, an NAD(+)-dependent dismutase from Mesorhizobium loti. Biochem. Biophys. Res. Commun. 456 (2015) 35-40. [PMID: 25446130]

[EC created 2018]

Return to EC 1.2.1 home page
Return to EC 1.2 home page
Return to EC 1 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page