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- W2791301631 abstract "Abstract Quorum sensing is a cell-cell communication process that bacteria use to orchestrate group behaviors. Quorum sensing is mediated by extracellular signal molecules called autoinducers. Autoinducers are often structurally similar, raising questions concerning how bacteria distinguish among them. Here, we use the Pseudomonas aeruginosa LasR quorum-sensing receptor to explore receptor sensitivity and selectivity. Alteration of LasR amino acid S129 increases ligand selectivity and decreases ligand sensitivity. Conversely, the L130F mutation enhances LasR sensitivity while reducing selectivity. We solve crystal structures of LasR ligand binding domains complexed with non-cognate autoinducers. Comparison to existing structures reveals that ligand selectivity/sensitivity is mediated by a flexible loop adjacent to the ligand binding site. We show that P. aeruginosa harboring LasR variants with modified selectivity or sensitivity exhibit altered quorum-sensing responses. We suggest that an evolutionary trade-off between ligand selectivity and sensitivity enables LasR to optimally regulate quorum-sensing traits." @default.
- W2791301631 created "2018-03-29" @default.
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- W2791301631 date "2018-02-21" @default.
- W2791301631 modified "2023-09-28" @default.
- W2791301631 title "ThePseudomonas aeruginosaLasR quorum-sensing receptor balances ligand selectivity and sensitivity" @default.
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- W2791301631 doi "https://doi.org/10.1101/269001" @default.
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