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Mechanism-based inactivation of benzoylformate decarboxylase, a thiamin diphosphate-dependent enzyme

  • Asim K. Bera
  • , Lena S. Polovnikova
  • , Juliatek Roestamadji
  • , Theodore S. Widlanski
  • , George L. Kenyon
  • , Michael J. McLeish
  • , Miriam S. Hasson

Research output: Contribution to journalArticlepeer-review

Abstract

Benzoylformate decarboxylase (BFD) from Pseudomonas putida is a thiamin diphosphate-dependent enzyme that catalyzes the non-oxidative decarboxylation of benzoylformate. Here we report the discovery of a mechanism-based inhibitor of BFD that is unusual in that it covalently modifies the enzyme via active site phosphorylation. Incubation of BFD with benzoylphosphonate results in time- and concentration-dependent inactivation of the enzyme. X-ray crystallography reveals that the inactivation is due to the phosphorylation of an active site serine residue.

Original languageEnglish (US)
Pages (from-to)4120-4121
Number of pages2
JournalJournal of the American Chemical Society
Volume129
Issue number14
DOIs
StatePublished - Apr 11 2007

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