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- W2078668719 abstract "HIV-1 protease (PR) is a primary target for anti-HIV therapeutics. A well conserved water molecule, denoted as W301, is found in almost all the crystallographic structures of PR/inhibitor complexes and it plays an important role in PR/inhibitor binding. As the PR/inhibitor interaction depends on the ionization state of the cleavage site which contains an aspartyl dyad (Asp25/Asp25′), the determination of the protonation states of aspartyl dyad in PR may be essential for drug design. In this study, a linear scaling quantum mechanical method, molecular fragmentation with conjugate caps (MFCC), is used for interaction study of PR/ABT-538 and W301 at four different monoprotonation states of the Asp25/Asp25′. Combined method of MFCC and conductor-like polarizable continuum model (CPCM) is applied in binding affinity calculation for four minimum energy structures which are extracted from four different molecular dynamics trajectories corresponding to four different monoprotonation states of Asp25/Asp25′. Our result is in good agreement with previous result obtained by FEP/TI method, showing that the conserved W301 contributes significantly to the binding free energy of PR/ABT-538 complex and different protonation states of Asp25/Asp25′ have significant impact on the binding free energy contribution from W301." @default.
- W2078668719 created "2016-06-24" @default.
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- W2078668719 date "2009-12-01" @default.
- W2078668719 modified "2023-09-24" @default.
- W2078668719 title "QUANTUM CALCULATION OF PROTEIN SOLVATION AND PROTEIN–LIGAND BINDING FREE ENERGY FOR HIV-1 PROTEASE/WATER COMPLEX" @default.
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- W2078668719 doi "https://doi.org/10.1142/s0219633609005313" @default.
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