8Q5L

PqsR coinducer binding domain of Pseudomonas aeruginosa with ligand 2f: 2-(4-(3-((6-chloro-1-isopropyl-1H-benzo[d]imidazol-2-yl)amino)-2-hydroxypropoxy)phenyl)acetonitrile

Summary for 8Q5L

• Entry DOI: 10.2210/pdb8q5l/pdb
• Related: 8Q5K
• Descriptor: Transcriptional regulator MvfR, 2-[4-[(2~{S})-3-[(6-chloranyl-1-propan-2-yl-benzimidazol-2-yl)amino]-2-oxidanyl-propoxy]phenyl]ethanenitrile (3 entities in total)
• Functional Keywords: transcriptional regulator, transcription
• Biological source: Pseudomonas aeruginosa UCBPP-PA14
• Total number of polymer chains: 1
• Total formula weight: 24687.36

Authors

Markham-Lee, Z.J.,Emsley, J. (deposition date: 2023-08-09, release date: 2024-01-17, Last modification date: 2024-02-07)

Primary citation

Soukarieh, F.,Mashabi, A.,Richardson, W.,Oton, E.V.,Romero, M.,Dubern, J.F.,Robertson, S.N.,Lucanto, S.,Markham-Lee, Z.,Sou, T.,Kukavica-Ibrulj, I.,Levesque, R.C.,Bergstrom, C.A.S.,Halliday, N.,Kellam, B.,Emsley, J.,Heeb, S.,Williams, P.,Stocks, M.J.,Camara, M.
Design, Synthesis, and Evaluation of New 1 H -Benzo[ d ]imidazole Based PqsR Inhibitors as Adjuvant Therapy for Pseudomonas aeruginosa Infections.
J.Med.Chem., 67:1008-1023, 2024

PubMed Abstract: is one of the top priority pathogens that requires immediate attention according to the World Health Organisation (WHO). Due to the alarming shortage of novel antimicrobials, targeting quorum sensing (QS), a bacterial cell to cell signaling system controlling virulence, has emerged as a promising approach as an antibiotic adjuvant therapy. Interference with the system, one of three QS systems in , results in reduction of bacterial virulence gene expression and biofilm maturation. Herein, we report a hit to lead process to fine-tune the potency of our previously reported inhibitor (IC 3.2 μM in PAO1-L), which led to the discovery of 2-(4-(3-((6-chloro-1-isopropyl-1-benzo[]imidazol-2-yl)amino)-2-hydroxypropoxy)phenyl)acetonitrile () as a potent PqsR antagonist. Compound inhibited the PqsR-controlled P- transcriptional reporter fusion in at low submicromolar concentrations. Moreover, showed improved efficacy against CF isolates with significant inhibition of pyocyanin, 2-alkyl-4(1)-quinolones production.

PubMed: 38170170
DOI: 10.1021/acs.jmedchem.3c00973

Experimental method

X-RAY DIFFRACTION (2.9 Å)