3 Biotech

, 9:40 | Cite as

Designing quorum sensing inhibitors of Pseudomonas aeruginosa utilizing FabI: an enzymic drug target from fatty acid synthesis pathway

  • Manmohit Kalia
  • Vivek Kumar Yadav
  • Pradeep Kumar Singh
  • Suhaga Dohare
  • Deepmala Sharma
  • Shahid Suhail Narvi
  • Vishnu AgarwalEmail author
Original Article


Pseudomonas aeruginosa infections are a leading cause of death in patients suffering from respiratory diseases. The multidrug-resistant nature of Pseudomonas is potentiated by a process known as quorum sensing. The aim of this study was to reveal new inhibitors of a well-validated but quite unexplored target, enoyl-ACP reductase, which contributes acyl chain lengths of N-acyl homoserine lactones that are major signaling molecules in gram-negative bacteria. In the present study, the crystal structure of FabI (PDB, ID 4NR0) was used for the structure-based identification of quorum sensing inhibitors of Pseudomonas aeruginosa. Active site residues of FabI were identified from the complex of FabI with triclosan and these active site residues were further used to screen for potential inhibitors from natural database. Three-dimensional structures of the 75 natural compounds were retrieved from the ZINC database and screened using PyRX software against FabI. Thirty-eight molecules from the initial screening were sorted on the basis of binding energy, using the known inhibitor triclosan as a standard. These molecules were subjected to various secondary filters, such as Lipinski’s Rule of Five, ADME, and toxicity. Finally, eight lead-like molecules were obtained after their evaluation for drug-like characteristics. The present study will open a new window for designing QS inhibitors against P. aeruginosa.


Microbial drug resistance Quorum sensing Enoyl-ACP reductase Pseudomonas aeruginosa 



Authors are thankful to the Department of Science and Technology (DST), Department of Biotechnology, Government of India for facilitation and support.

Compliance with ethical standards

Conflict of interest

The authors have no conflicts of interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  • Manmohit Kalia
    • 1
  • Vivek Kumar Yadav
    • 1
  • Pradeep Kumar Singh
    • 1
  • Suhaga Dohare
    • 1
  • Deepmala Sharma
    • 2
  • Shahid Suhail Narvi
    • 3
  • Vishnu Agarwal
    • 1
    Email author
  1. 1.Department of BiotechnologyMotilal Nehru National Institute of Technology AllahabadAllahabadIndia
  2. 2.Department of MathematicsNational Institute of Technology RaipurRaipurIndia
  3. 3.Department of ChemistryMotilal Nehru National Institute of Technology AllahabadAllahabadIndia

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