Figure 5.

Comparison of the ligand-binding sites of prototypes of QS LuxRs and PAB LuxR solos subfamily (Top view). Mapping of the three Clusters of residues in (a) and (c) on the X-ray crystal structure of TraR, in complex with OC8-HSL (PDB_ID 1H0M [24]), showing the C_α trace and stereo view of the side chains, respectively; in (b) and (d) on the homology model of OryR, the C_α trace and stereo view of the side chains orientations can be seen. Residues have been labeled according to the TraR numbering scheme. The carbon, nitrogen and oxygen atoms of OC8-HSL, are colored in yellow, blue and red respectively. Figures produced by Pymol [33].