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Effect of Biomolecular Conformation on Docking Simulation: A Case Study on a Potent Hiv-1 Protease Inhibitor



Razzaghiasl N1, 2 ; Sepehri S3 ; Ebadi A4 ; Miri R5, 6 ; Shahabipoura S1
Authors
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Authors Affiliations
  1. 1. Department of Medicinal Chemistry, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
  2. 2. Drug and Advanced Sciences Research Center, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
  3. 3. Department of Medicinal Chemistry, Isfahan University of Medical Sciences, Iran
  4. 4. Department of Medicinal Chemistry, School of Pharmacy, Hamadan University of Medical Sciences, Hamadan, Iran
  5. 5. Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
  6. 6. Department of Medicinal Chemistry, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran

Source: Iranian Journal of Pharmaceutical Research Published:2015

Abstract

Human immunodeficiency virus infection/acquired immunodeficiency syndrome (HIV/ AIDS) is a disease pertained to the human immune system. Given its crucial role in viral replication, HIV-1 protease (HIV-1 PR) is a prime therapeutic target in AIDS therapy. In this regard, the dynamic aspects of ligand-enzyme interactions may indicate an important role of conformational variability in HIV-1 PR inhibitor/drug design. In the present contribution, the effect of HIV-1 PR flexibility (within multiple crystallographic structures of HIV-1 PR) on binding to the Amprenavir was elucidated via an ensemble docking approach. Molecular docking studies were performed via advanced AutoDock4.2 software. Ensemble docking of Amprenavir into the active site of various conformations of HIV-1 PR predicted different interaction modes/ energies. Analysis of binding factors in terms of docking false negatives/positives revealed a determinant role of enzyme conformational variation in prediction of optimum induced fit (PDB ID: 1HPV). The outcomes of this study demonstrated that conformation of receptor may significantly affect the accuracy of docking/binding results in structure-based rational design of anti HIV-1 PR agents. Furthermore; some strategies to re-score the docking results in HIV-1 PR targeted docking studies were proposed. © 2015 by School of Pharmacy Shaheed Beheshti University of Medical Sciences and Health Services.
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