IUBMB Enzyme Nomenclature


Accepted name: short-chain-enoyl-CoA hydratase

Reaction: a short-chain (3S)-3-hydroxyacyl-CoA = a short-chain trans-2-enoyl-CoA + H2O

Other name(s): 3-hydroxybutyryl-CoA dehydratase; crotonase; crt (gene name)

Systematic name: short-chain-(3S)-3-hydroxyacyl-CoA hydro-lyase

Comments: The enzyme from the bacterium Clostridium acetobutylicum is part of the central fermentation pathway and plays a key role in the production of both acids and solvents. It is specific for short, C4-C6, chain length substrates and exhibits an extremely high turnover number for crotonyl-CoA. cf. EC, enoyl-CoA hydratase and EC, long-chain-enoyl-CoA hydratase.

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


1. Waterson, R.M., Castellino, F.J., Hass, G.M. and Hill, R.L. Purification and characterization of crotonase from Clostridium acetobutylicum. J. Biol. Chem. 247 (1972) 5266-5271. [PMID: 5057466]

2. Waterson, R.M. and Conway, R.S. Enoyl-CoA hydratases from Clostridium acetobutylicum and Escherichia coli. Methods Enzymol. 71 Pt C (1981) 421-430. [PMID: 7024731]

3. Boynton, Z.L., Bennet, G.N. and Rudolph, F.B. Cloning, sequencing, and expression of clustered genes encoding β-hydroxybutyryl-coenzyme A (CoA) dehydrogenase, crotonase, and butyryl-CoA dehydrogenase from Clostridium acetobutylicum ATCC 824. J. Bacteriol. 178 (1996) 3015-3024. [PMID: 8655474]

[EC created 2014]

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