2-enoate reductase

In enzymology, 2-enoate reductase is an enzyme that catalyzes the chemical reaction of α,β-unsaturated carboxylic acids. Crotonic acid is a typical example:
The three substrates of this enzyme are crotonic acid, reduced nicotinamide adenine dinucleotide, and a proton. Its products are butyric acid and oxidised NAD⁺.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is butanoate:NAD+ Delta2-oxidoreductase. This enzyme is also called enoate reductase. This enzyme participates in phenylalanine metabolism. It has cofactors: flavin adenine dinucleotide and iron–sulfur protein.