IUBMB Enzyme Nomenclature


Accepted name: 4-hydroxy-tetrahydrodipicolinate synthase

Reaction: pyruvate + L-aspartate-4-semialdehyde = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate + H2O

For diagram of reaction click here.

Glossary: (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate = (2S,4S)-4-hydroxy-2,3,4,5-tetrahydropyridine-2,6-dicarboxylate

Other name(s): dihydrodipicolinate synthase (incorrect); dihydropicolinate synthetase (incorrect); dihydrodipicolinic acid synthase (incorrect); L-aspartate-4-semialdehyde hydro-lyase (adding pyruvate and cyclizing); dapA (gene name).

Systematic name: L-aspartate-4-semialdehyde hydro-lyase [adding pyruvate and cyclizing; (2S,4S)-4-hydroxy-2,3,4,5-tetrahydrodipicolinate-forming]

Comments: Studies of the enzyme from the bacterium Escherichia coli have shown that the reaction can be divided into three consecutive steps: Schiff base formation between pyruvate and an active-site lysine, the addition of L-aspartate-semialdehyde, and finally transimination leading to cyclization with simultaneous dissociation of the product.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 9055-59-8


1. Yugari, Y. and Gilvarg, C. The condensation step in diaminopimelate synthesis. J. Biol. Chem. 240 (1965) 4710-4716. [PMID: 5321309]

2. Blickling, S., Renner, C., Laber, B., Pohlenz, H.D., Holak, T.A. and Huber, R. Reaction mechanism of Escherichia coli dihydrodipicolinate synthase investigated by X-ray crystallography and NMR spectroscopy. Biochemistry 36 (1997) 24-33. [PMID: 8993314]

3. Devenish, S.R., Blunt, J.W. and Gerrard, J.A. NMR studies uncover alternate substrates for dihydrodipicolinate synthase and suggest that dihydrodipicolinate reductase is also a dehydratase. J Med Chem 53 (2010) 4808-4812. [PMID: 20503968]

4. Soares da Costa, T.P., Muscroft-Taylor, A.C., Dobson, R.C., Devenish, S.R., Jameson, G.B. and Gerrard, J.A. How essential is the 'essential' active-site lysine in dihydrodipicolinate synthase. Biochimie 92 (2010) 837-845. [PMID: 20353808]

[EC created 1972 as EC, transferred 2012 to EC]

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