Molecular orbital studies of reaction mechanism and transition state structures for GABA-transaminase

Peter R. Andrews, Magdy Iskander, Graham Jones, David A. Winkler

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The reaction catalyzed by the enzyme GABA-transaminase has been studied by means of semi-empirical molecular orbital calculations. The results elucidate the role of the active site general base and the cofactor in reducing the barrier to a 1,3-prototropic shift, the rate-determining step in the transamination reaction. The mechanistic inferences drawn are consistent with previous studies of pyridoxal phosphate-dependent transaminases. 

Original languageEnglish
Pages (from-to)125-132
Number of pages8
JournalEuropean Journal of Medicinal Chemistry
Issue number2
Publication statusPublished - 1988
Externally publishedYes


  • enzyme inhibitors
  • GABA-transaminase
  • molecular orbital study
  • pyridoxal phosphate
  • reaction mechanism
  • transition state

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