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Crotonyl-CoA reductase (EC1.3.1.86, butyryl-CoA dehydrogenase, butyryl dehydrogenase, unsaturated acyl-CoA reductase, ethylene reductase, enoyl-coenzyme A reductase, unsaturated acyl coenzyme A reductase, butyryl coenzyme A dehydrogenase, short-chain acyl CoA dehydrogenase, short-chain acyl-coenzyme A dehydrogenase, 3-hydroxyacyl CoA reductase, butanoyl-CoA:(acceptor) 2,3-oxidoreductase, CCR) is an enzyme with systematic namebutanoyl-CoA:NADP 2,3-oxidoreductase. This enzyme catalyses the following chemical reaction
butanoyl-CoA + NADP (E)-but-2-enoyl-CoA + NADPH + H
This enzyme catalyses the reaction in the reverse direction.