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Substance Name: Threonine Dehydratase
RN: 9024-34-4


  • A pyridoxal-phosphate protein that catalyzes the deamination of THREONINE to 2-ketobutyrate and AMMONIA. The role of this enzyme can be biosynthetic or biodegradative. In the former role it supplies 2-ketobutyrate required for ISOLEUCINE biosynthesis, while in the latter it is only involved in the breakdown of threonine to supply energy. This enzyme was formerly listed as EC
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Names and Synonyms

Name of Substance

  • Threonine Dehydratase

MeSH Heading

  • Threonine Dehydratase


  • Ammonia-Lyase, threonine
  • Deaminase, threonine
  • Dehydrase, threonine
  • Dehydratase, threonine
  • Threonine ammonia lyase
  • Threonine ammonia-lyase
  • Threonine deaminase
  • Threonine dehydrase

Systematic Name

  • L-Threonine hydro-lyase (deaminating)

Registry Numbers

CAS Registry Number

  • 9024-34-4

System Generated Number

  • 0009024344