ANTICANCER DRUGS AS POTENTIAL INHIBITORS OF AcrAB-TolC OF MULTIDRUG RESISTANT E.coli: AN IN SILICO MOLECULAR MODELING AND DOCKING STUDY

Authors

  • Pranjali Gupta Department of Biotechnology, Graphic Era University, Dehradun
  • Nishant Rai Department of Biotechnology, Graphic Era University, Dehradun
  • Pankaj Gautam Graphic Era University

Abstract

 

Objective: Overexpression of AcrAB-TolC protein complex is often associated with the virulence of multidrug-resistant bacteria. Development of an
effective efflux pump inhibitors (EPI) can be a major strategy to enhance the effectivity of current antibiotics and to restrain the menace of antibiotic
resistance among bacteria. Molecular docking based assessment of anticancer drugs as EPI with comparable docking scores of known putative EPI.
Methods: Molecular docking of target proteins (AcrA, AcrB and TolC) of Escherichia coli was carried out with four putative and seven selected
anticancer drugs using iGEMDOCK software separately.
Results: All the four putative inhibitors (norepinephrine, reserpine, verapamil and trimethoprim) used in the present study binds to AcrA (−41.9
kcal/mol, −56.75 kcal/mol, −76.69 kcal/mol and −45.20 kcal/mol respectively), AcrB (−74.61 kcal/mol, −135.97 kcal/mol, −126.66 kcal/mol and
−87.57kcal/mol respectively) and TolC (−78.49 kcal/mol, −90.22 kcal/mol, −89.42 kcal/mol and −62.57 kcal/mol respectively) with high affinity and
seven drug ligands (etoposide, paclitaxel, tamoxifen, mitomycin and thalidomide, vinblastine methotrexate) showed comparable docking energies
(AcrA [−36.44 kcal/mol, −78.23 kcal/mol, −17.04 kcal/mol, −42.96 kcal/mol, −44.94 kcal/mol, −67.96 kcal/mol and −20.15 kcal/mol respectively],
AcrB [−128.11 kcal/mol, −132.86 kcal/mol, −104.85 kcal/mol, −98.91 kcal/mol, −96.47 kcal/mol, −108.79 and −106.36 kcal/mol respectively], TolC
[−68.42 kcal/mol, −88.29 kcal/mol, −64.69 kcal/mol, −68.28 kcal/mol, −59.36 kcal/mol, −77.28 kcal/mol and −74.52 respectively]) with putative
inhibitors.
Conclusion: Paclitaxel and vinblastine showed high affinity for all units of AcrAB-TolC of E. coli.
Keywords: AcrAB-TolC, Efflux pump, Efflux pump inhibitor, Multidrug resistance, Molecular modeling and docking, Escherichia coli.

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Author Biographies

Pranjali Gupta, Department of Biotechnology, Graphic Era University, Dehradun

Research Scholar

Nishant Rai, Department of Biotechnology, Graphic Era University, Dehradun

Associate Professor

Pankaj Gautam, Graphic Era University

Assistant Professor,

Department of Biotechnology

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Published

01-01-2015

How to Cite

Gupta, P., N. Rai, and P. Gautam. “ANTICANCER DRUGS AS POTENTIAL INHIBITORS OF AcrAB-TolC OF MULTIDRUG RESISTANT E.Coli: AN IN SILICO MOLECULAR MODELING AND DOCKING STUDY”. Asian Journal of Pharmaceutical and Clinical Research, vol. 8, no. 1, Jan. 2015, pp. 351-8, https://mail.innovareacademics.in/journals/index.php/ajpcr/article/view/3767.

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