3U3W:
reference: Structural basis for the activation mechanism of the PlcR virulence regulator by the quorum-sensing signal peptide PapR., Grenha R, Slamti L, Nicaise M, Refes Y, Lereclus D, Nessler S, Proc Natl Acad Sci U S A. 2013 Jan 15;110(3):1047-52. doi:, 10.1073/pnas.1213770110. Epub 2012 Dec 31. PMID: 23277548

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