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Substance Name: Acetolactate Synthase
RN: 9027-45-6


  • A flavoprotein enzyme that catalyzes the formation of acetolactate from 2 moles of PYRUVATE in the biosynthesis of VALINE and the formation of acetohydroxybutyrate from pyruvate and alpha-ketobutyrate in the biosynthesis of ISOLEUCINE. This enzyme was formerly listed as EC
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Names and Synonyms

Name of Substance

  • Acetolactate Synthase

MeSH Heading

  • Acetolactate Synthase


  • Acetohydroxy Acid Synthase
  • Acetohydroxy Acid Synthetase
  • Acetohydroxyacid Synthetase I
  • Acetolactate Synthetase
  • Acetoxyhydroxyacid Synthase III
  • Acid Synthase, Acetohydroxy
  • Acid Synthetase, Acetohydroxy
  • Synthase III, Acetoxyhydroxyacid
  • Synthase, Acetohydroxy Acid
  • Synthase, Acetolactate
  • Synthetase I, Acetohydroxyacid
  • Synthetase, Acetohydroxy Acid
  • Synthetase, Acetolactate

Systematic Name

  • Acetolactate pyruvate-lyase (carboxylating)

Registry Numbers

CAS Registry Number

  • 9027-45-6

System Generated Number

  • 0009027456