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Title: Conformational variation of an extreme drug resistant mutant of HIV protease

Journal Article · · Journal of Molecular Graphics and Modelling

Molecular mechanisms leading to high level drug resistance have been analyzed for the clinical variant of HIV-1 protease bearing 20 mutations (PR20); which has several orders of magnitude worse affinity for tested drugs. Two crystal structures of ligand-free PR20 with the D25N mutation of the catalytic aspartate (PR20D25N) revealed three dimers with different flap conformations. The diverse conformations of PR20D25N included a dimer with one flap in a unique “tucked” conformation; directed into the active site. Analysis of molecular dynamics (MD) simulations of the ligand-free PR20 and wild-type enzymes showed that the mutations in PR20 alter the correlated interactions between two monomers in the dimer. The two flaps tend to fluctuate more independently in PR20 than in the wild type enzyme. Combining the results of structural analysis by X-ray crystallography and MD simulations; unusual flap conformations and weakly correlated inter-subunit motions may lead to the high level resistance of PR20.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
W-31-109-Eng-38
OSTI ID:
1222023
Alternate ID(s):
OSTI ID: 1250921
Journal Information:
Journal of Molecular Graphics and Modelling, Vol. 62, Issue C; ISSN 1093-3263
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (54)

Retroviral proteases and their roles in virion maturation journal May 2015
Structure-based design of AIDS drugs and the development of resistance journal August 2002
Enhancing Protein Backbone Binding-A Fruitful Concept for Combating Drug-Resistant HIV journal January 2012
Structure Based Drug Design for HIV Protease: From Molecular Modeling to Cheminformatics journal May 2007
Identification of HIV Inhibitors Guided by Free Energy Perturbation Calculations journal March 2012
Targeting structural flexibility in HIV-1 protease inhibitor binding journal February 2007
Protease inhibitors effectively block cell-to-cell spread of HIV-1 between T cells journal January 2013
Basic concepts in RNA virus evolution. journal June 1996
Predictors of HIV Drug‐Resistance Mutations in a Large Antiretroviral‐Naive Cohort Initiating Triple Antiretroviral Therapy journal February 2005
Higher Rates of Viral Suppression with Nonnucleoside Reverse Transcriptase Inhibitors Compared to Single Protease Inhibitors Are Not Explained by Better Adherence journal October 2004
Highly resistant HIV-1 proteases and strategies for their inhibition journal June 2015
Binding Kinetics of Darunavir to Human Immunodeficiency Virus Type 1 Protease Explain the Potent Antiviral Activity and High Genetic Barrier journal October 2007
Inhibition of autoprocessing of natural variants and multidrug resistant mutant precursors of HIV-1 protease by clinical inhibitors journal May 2011
Enhanced Stability of Monomer Fold Correlates with Extreme Drug Resistance of HIV-1 Protease journal October 2013
HIV-1 Protease with 20 Mutations Exhibits Extreme Resistance to Clinical Inhibitors through Coordinated Structural Rearrangements journal March 2012
Substituted Bis-THF Protease Inhibitors with Improved Potency against Highly Resistant Mature HIV-1 Protease PR20 journal March 2015
Design of gem -Difluoro- bis -Tetrahydrofuran as P2 Ligand for HIV-1 Protease Inhibitors to Improve Brain Penetration: Synthesis, X-ray Studies, and Biological Evaluation journal October 2014
Structure of the unbound form of HIV-1 subtype A protease: comparison with unbound forms of proteases from other HIV subtypes journal February 2010
Exploring the drug resistance of V32I and M46L mutant HIV-1 protease to inhibitor TMC114: Flap dynamics and binding mechanism journal March 2015
“Wide-Open” 1.3 Å Structure of a Multidrug-Resistant HIV-1 Protease as a Drug Target journal December 2005
Effect of the Active Site D25N Mutation on the Structure, Stability, and Ligand Binding of the Mature HIV-1 Protease journal May 2008
Molecular dynamics simulations of HIV-1 protease with peptide substrate journal January 1994
Stiffness and energy conservation in molecular dynamics: An improved integrator journal September 1993
Cross-docking study on InhA inhibitors: a combination of Autodock Vina and PM6-DH2 simulations to retrieve bio-active conformations journal January 2012
Improved Parameters for Generating Partial Charges: Correlation with Observed Dipole Moments journal September 1999
Molecular mechanics calculations on HIV-1 protease with peptide substrates correlate with experimental data journal January 1996
Molecular mechanics analysis of drug-resistant mutants of HIV protease journal June 1999
Molecular dynamics simulations of 14 HIV protease mutants in complexes with indinavir journal September 2004
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Phaser crystallographic software journal July 2007
Macromolecular TLS Refinement in REFMAC at Moderate Resolutions book January 2003
Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Version 1.2 of the Crystallography and NMR system journal October 2007
Secondary-structure matching (SSM), a new tool for fast protein structure alignment in three dimensions journal November 2004
High Resolution Crystal Structures of HIV-1 Protease with a Potent Non-peptide Inhibitor (UIC-94017) Active Against Multi-drug-resistant Clinical Strains journal April 2004
Caspase-3 binds diverse P4 residues in peptides as revealed by crystallography and structural modeling journal May 2009
Insights into the functional role of protonation states in the HIV-1 protease-BEA369 complex: molecular dynamics simulations and free energy calculations journal March 2009
Amprenavir complexes with HIV-1 protease and its drug-resistant mutants altering hydrophobic clusters: HIV protease mutants altering hydrophobic clusters journal August 2010
Energetic basis for drug resistance of HIV-1 protease mutants against amprenavir journal February 2012
Domain communication in the dynamical structure of human immunodeficiency virus 1 protease. journal November 1990
How does a symmetric dimer recognize an asymmetric substrate? a substrate complex of HIV-1 protease journal September 2000
Conformational flexibility in the flap domains of ligand-free HIV protease journal July 2007
HIV-1 protease molecular dynamics of a wild-type and of the V82F/I84V mutant: Possible contributions to drug resistance and a potential new target site for drugs journal April 2004
Efficiency of a second-generation HIV-1 protease inhibitor studied by molecular dynamics and absolute binding free energy calculations journal June 2004
Bio3d: an R package for the comparative analysis of protein structures journal August 2006
Molecular dynamics and protein function journal May 2005
Protein Flexibility and Enzymatic Catalysis book May 2012
HIV-1 Protease Substrate Binding and Product Release Pathways Explored with Coarse-Grained Molecular Dynamics journal June 2007
Role of Conformational Fluctuations in the Enzymatic Reaction of HIV-1 Protease journal May 2002
Cooperative fluctuations of unliganded and substrate-bound HIV-1 protease: A structure-based analysis on a variety of conformations from crystallography and molecular dynamics simulations journal May 2003
Structures of Darunavir-Resistant HIV-1 Protease Mutant Reveal Atypical Binding of Darunavir to Wide Open Flaps journal April 2014
Ligand modifications to reduce the relative resistance of multi-drug resistant HIV-1 protease journal December 2013
Global Dynamics of Proteins: Bridging Between Structure and Function journal April 2010
Correlated motions are a fundamental property of β-sheets journal June 2014

Cited By (5)

Structural analyses of 2015-updated drug-resistant mutations in HIV-1 protease: an implication of protease inhibitor cross-resistance journal December 2016
Reviewing HIV-1 Gag Mutations in Protease Inhibitors Resistance: Insights for Possible Novel Gag Inhibitor Designs journal September 2019
Highly drug‐resistant HIV‐1 protease reveals decreased intra‐subunit interactions due to clusters of mutations journal January 2020
Flap Dynamics in Aspartic Proteases: A Computational Perspective journal March 2016
Evolution under Drug Pressure Remodels the Folding Free-Energy Landscape of Mature HIV-1 Protease journal July 2016

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