@article{2345,
  keywords = {Quorum Sensing, Vibrio, Molecular Sequence Data, Bacterial Proteins, 4-Butyrolactone, Protein Kinases, Transcription Factors, Protein Structure, Tertiary, Mutagenesis, Site-Directed, Acyl-Butyrolactones, Amino Acid Sequence},
  author = {Lee Swem and Danielle Swem and Ned Wingreen and Bonnie Bassler},
  title = {Deducing receptor signaling parameters from in vivo analysis: LuxN/AI-1 quorum sensing in Vibrio harveyi.},
  abstract = { <p>Quorum sensing, a process of bacterial cell-cell communication, relies on production, detection, and response to autoinducer signaling molecules. LuxN, a nine-transmembrane domain protein from Vibrio harveyi, is the founding example of membrane-bound receptors for acyl-homoserine lactone (AHL) autoinducers. We used mutagenesis and suppressor analyses to identify the AHL-binding domain of LuxN and discovered LuxN mutants that confer both decreased and increased AHL sensitivity. Our analysis of dose-response curves of multiple LuxN mutants pins these inverse phenotypes on quantifiable opposing shifts in the free-energy bias of LuxN for occupying its kinase and phosphatase states. To understand receptor activation and to characterize the pathway signaling parameters, we exploited a strong LuxN antagonist, one of fifteen small-molecule antagonists we identified. We find that quorum-sensing-mediated communication can be manipulated positively and negatively to control bacterial behavior and, more broadly, that signaling parameters can be deduced from in vivo data.</p> },
  year = {2008},
  journal = {Cell},
  volume = {134},
  pages = {461-73},
  month = {2008 Aug 08},
  issn = {1097-4172},
  doi = {10.1016/j.cell.2008.06.023},
  language = {eng},
}