An enzyme involved in the biosynthesis of isoleucine and valine. It converts 2-acetolactate into 3-hydroxy-2-oxo-isovalerate. Also acts on 2-hydroxy-2-acetobutyrate to form 2-hydroxy-2-oxo-3-methylvalerate. EC 5.4.99.3.
Synonyms: Acid Reductoisomerase, Acetohydroxy Acetohydroxy Acid Reductoisomerase Mutase, 2-Acetolactate 2-Acetolactate Mutase Isomeroreductase, 2-Acetohydroxy-3-Ketoacid 2-Acetohydroxy-3-Ketoacid Isomeroreductase 2 Acetolactate Mutase Reductoisomerase, Acetohydroxy Acid 2-Acetolactate methylmutase EC 5.4.99.3 2 Acetohydroxy 3 Ketoacid Isomeroreductase