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Substance Name: Cysteine Synthase
RN: 37290-89-4


  • An enzyme that catalyzes the biosynthesis of cysteine in microorganisms and plants from O-acetyl-L-serine and hydrogen sulfide. This enzyme was formerly listed as EC
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Names and Synonyms

Name of Substance

  • Cysteine Synthase

MeSH Heading

  • Cysteine Synthase


  • Cysteine Synthase
  • Cysteine Synthase A
  • Cysteine synthetase
  • EC
  • O-Acetylserine (Thiol)-Lyase
  • O-Acetylserine Sulfhydrylase

Systematic Names

  • O(3)-Acetyl-L-serine acetate-lyase (adding hydrogen sulfide)
  • Synthase, cysteine

Registry Numbers

CAS Registry Number

  • 37290-89-4

System Generated Number

  • 0037290894