Crystallization and X-ray diffraction of PrnA, a flavin dependent halogenase

C Dong, M Dorward, A Jotsch, J-H Van Pee, James Henderson Naismith

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Chlorination of natural products is often required for their biological activity; notable examples include vancomycin, the last-ditch antibiotic. It is now known that many chlorinated natural products are made not by haloperoxidases, but by FADH(2)-dependent halogenases. The mechanism of the flavin-containing enzymes is obscure and there are no structural data. Here, crystals of PrnA ( tryptophan 7-halogenase), an enzyme that regioselectively chlorinates tryptophan, cocrystallized with tryptophan and FAD are reported. The crystals belong to the tetragonal space group P4(3)2(1)2 or P4(1)2(1)2, with unit-cell parameters a = b = 67.8, c = 276.9 Angstrom. A data set to 1.8 Angstrom with 93% completeness and an R-merge of 7.1% has been collected from a single flash-cooled crystal. A method for incorporating selenomethionine in a Pseudomonas fluorescens expression system also is reported.

Original languageEnglish
Pages (from-to)1438-1440
Number of pages3
JournalActa Crystallographica. Section D, Biological crystallography
Volume60
DOIs
Publication statusPublished - Aug 2004

Keywords

  • BIOSYNTHESIS
  • PYRROLNITRIN
  • CHLOROPEROXIDASE
  • GENES
  • BACTERIA
  • STRAINS

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