IUBMB Enzyme Nomenclature


Accepted name: long-chain acyl-CoA dehydrogenase

Reaction: a long-chain acyl-CoA + electron-transfer flavoprotein = a long-chain trans-2,3-dehydroacyl-CoA + reduced electron-transfer flavoprotein

Glossary: a long-chain acyl-CoA = an acyl-CoA thioester where the acyl chain contains 13 to 22 carbon atoms.

Other name(s): palmitoyl-CoA dehydrogenase; palmitoyl-coenzyme A dehydrogenase; long-chain acyl-coenzyme A dehydrogenase; long-chain-acyl-CoA:(acceptor) 2,3-oxidoreductase; ACADL (gene name).

Systematic name: long-chain acyl-CoA:electron-transfer flavoprotein 2,3-oxidoreductase

Comments: Contains FAD as prosthetic group. One of several enzymes that catalyse the first step in fatty acids β-oxidation. The enzyme from pig liver can accept substrates with acyl chain lengths of 6 to at least 16 carbon atoms. The highest activity was found with C12, and the rates with C8 and C16 were 80 and 70%, respectively [2]. The enzyme from rat can accept substrates with C8-C22. It is most active with C14 and C16, and has no activity with C4, C6 or C24 [4]. cf. EC, short-chain acyl-CoA dehydrogenase, EC, medium-chain acyl-CoA dehydrogenase, and EC, very-long-chain acyl-CoA dehydrogenase.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 59536-74-2


1. Crane, F.L., Hauge, J.G. and Beinert, H. Flavoproteins involved in the first oxidative step of the fatty acid cycle. Biochim. Biophys. Acta 17 (1955) 292-294. [PMID: 13239683]

2. Hauge, J.G., Crane, F.L. and Beinert, H. On the mechanism of dehydrogenation of fatty acyl derivatives of coenzyme A. III. Palmityl CoA dehydrogenase. J. Biol. Chem. 219 (1956) 727-733. [PMID: 13319294]

3. Hall, C.L., Heijkenkjold, L., Bartfai, T., Ernster, L. and Kamin, H. Acyl coenzyme A dehydrogenases and electron-transferring flavoprotein from beef heart mitochondria. Arch. Biochem. Biophys. 177 (1976) 402-414. [PMID: 1015826]

4. Ikeda, Y., Ikeda, K.O. and Tanaka, K. Purification and characterization of short-chain, medium-chain, and long-chain acyl-CoA dehydrogenases from rat liver mitochondria. Isolation of the holo- and apoenzymes and conversion of the apoenzyme to the holoenzyme. J. Biol. Chem. 260 (1985) 1311-1325. [PMID: 3968063]

5. Djordjevic, S., Dong, Y., Paschke, R., Frerman, F.E., Strauss, A.W. and Kim, J.J. Identification of the catalytic base in long chain acyl-CoA dehydrogenase. Biochemistry 33 (1994) 4258-4264. [PMID: 8155643]

[EC created 1989 as EC, part transferred 2012 to EC]

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