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. 2022 Dec 1;13:7402. doi: 10.1038/s41467-022-35030-w

Fig. 4. A stability-optimized variant of RhlR overcomes PqsE- and C4-HSL-dependent RhlR-signaling.

Fig. 4

a Protein melting point analysis of the stability-optimized RhlR-P75 vs. wildtype RhlR in the presence or absence of C4-HSL or mBTL. b Crystal structure of RhlR-P75 in complex with mBTL. Positions that have been altered with respect to the wildtype protein are shown in white. The magnified insert shows a cross-eyed stereo plot of mBTL in the ligand binding site. c Stability-optimized RhlR-P61 (RhlR-P75 with WT-DBD) stimulates pyocyanin production in a P. aeruginosa PA14 ΔrhlR/rhlI/pqsE triple mutant without requiring C4-HSL or mBTL. Mean values with error bars indicating the standard deviation of three independent measurements are shown. Source data are provided as a Source Data file.