Application of fragment-based screening to the design of inhibitors of Escherichia coli DsbA

Luke Anthony Adams, Pooja Sharma, Biswaranjan Mohanty, Olga Ilyichova, Mark Mulcair, Martin Williams, Ellen Gleeson, Makrina Torsika, Bradley Croy Doak, Sofia Maria Dias de Gouveia Caria, Kieran Rimmer, Henry James Horne, Stephen R Shouldice, Mansha Vazirani, Stephen James Headey, Brent Raymond Plumb, Jennifer Martin, Begona Heras, Jamie Scott Simpson, Martin Scanlon

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27 Citations (Scopus)


The thiol-disulfide oxidoreductase enzyme DsbA catalyzes the formation of disulfide bonds in the periplasm of Gram-negative bacteria. DsbA substrates include proteins involved in bacterial virulence. In the absence of DsbA, many of these proteins do not fold correctly, which renders the bacteria avirulent. Thus DsbA is a critical mediator of virulence and inhibitors may act as antivirulence agents. Biophysical screening has been employed to identify fragments that bind to DsbA from Escherichia coli. Elaboration of one of these fragments produced compounds that inhibit DsbA activity in vitro. In cell-based assays, the compounds inhibit bacterial motility, but have no effect on growth in liquid culture, which is consistent with selective inhibition of DsbA. Crystal structures of inhibitors bound to DsbA indicate that they bind adjacent to the active site. Together, the data suggest that DsbA may be amenable to the development of novel antibacterial compounds that act by inhibiting bacterial bacterial virulence,drug design, EcDsbA,fragment-based drugdiscovery,medicinal chemistry.
Original languageEnglish
Pages (from-to)2179-2184
Number of pages6
JournalAngewandte Chemie - International Edition
Issue number7
Publication statusPublished - 2015


  • Bacterial virulence
  • Drug design
  • EcDsbA
  • Fragment-based drug discovery
  • Medicinal chemistry

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