Purification and Properties of a Carbonyl Reductase Useful for Production of Ethyl (S)-4-Chloro-3-hydroxybutanoate from Kluyveromyces lactis

Abstract

  A novel carbonyl reductase (KLCR1) that reduced ethyl 4-chloroacetoacetate (ECAA) to synthesize ethyl (S)-4-chloro-3-hydroxybutanoate ((S)-ECHB) was purified from Kluyveromyces lactis. KLCR1 catalyzed the NADPH-dependent reduction of ECAA enantioselectively but not the oxidation of (S)-ECHB. From partial amino acid sequences, KLCR1 was suggested to be an α subunit of fatty acid synthase (FAS) but did not have FAS activity.