IUBMB Enzyme Nomenclature


Accepted name: 3-keto-5-aminohexanoate cleavage enzyme

Reaction: (5S)-5-amino-3-oxohexanoate + acetyl-CoA = L-3-aminobutanoyl-CoA + acetoacetate

For diagram of reaction click here.

Glossary: L-3-aminobutyryl-CoA = (3S)-3-aminobutanoyl-CoA

Other name(s): kce (gene name)

Systematic name: (5S)-5-amino-3-oxohexanoate:acetyl-CoA ethylamine transferase

Comments: Requires Zn2+. The enzyme, isolated from the bacteria Fusobacterium nucleatum and Cloacimonas acidaminovorans, is involved in the anaerobic fermentation of lysine.

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


1. Barker, H.A., Kahn, J.M. and Hedrick, L. Pathway of lysine degradation in Fusobacterium nucleatum. J. Bacteriol. 152 (1982) 201-207. [PMID: 6811551]

2. Kreimeyer, A., Perret, A., Lechaplais, C., Vallenet, D., Medigue, C., Salanoubat, M. and Weissenbach, J. Identification of the last unknown genes in the fermentation pathway of lysine. J. Biol. Chem. 282 (2007) 7191-7197. [PMID: 17166837]

3. Bellinzoni, M., Bastard, K., Perret, A., Zaparucha, A., Perchat, N., Vergne, C., Wagner, T., de Melo-Minardi, R.C., Artiguenave, F., Cohen, G.N., Weissenbach, J., Salanoubat, M. and Alzari, P.M. 3-Keto-5-aminohexanoate cleavage enzyme: a common fold for an uncommon Claisen-type condensation. J. Biol. Chem. 286 (2011) 27399-27405. [PMID: 21632536]

[EC created 2015]

Return to EC 2.3.1 home page
Return to EC 2.3 home page
Return to EC 2 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page