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• W2619205025 endingPage "1666" @default.
• W2619205025 startingPage "1652" @default.
• W2619205025 abstract "Water molecules play an essential role for mediating interactions between ligands and protein binding sites. Displacement of specific water molecules can favorably modulate the free energy of binding of protein–ligand complexes. Here, the nature of water interactions in protein binding sites is investigated by 3D RISM (three-dimensional reference interaction site model) integral equation theory to understand and exploit local thermodynamic features of water molecules by ranking their possible displacement in structure-based design. Unlike molecular dynamics-based approaches, 3D RISM theory allows for fast and noise-free calculations using the same detailed level of solute–solvent interaction description. Here we correlate molecular water entities instead of mere site density maxima with local contributions to the solvation free energy using novel algorithms. Distinct water molecules and hydration sites are investigated in multiple protein–ligand X-ray structures, namely streptavidin, factor Xa, and factor VIIa, based on 3D RISM-derived free energy density fields. Our approach allows the semiquantitative assessment of whether a given structural water molecule can potentially be targeted for replacement in structure-based design. Finally, PLS-based regression models from free energy density fields used within a 3D-QSAR approach (CARMa - comparative analysis of 3D RISM Maps) are shown to be able to extract relevant information for the interpretation of structure–activity relationship (SAR) trends, as demonstrated for a series of serine protease inhibitors." @default.
• W2619205025 created "2017-06-05" @default.
• W2619205025 creator A5007864658 @default.
• W2619205025 creator A5027225156 @default.
• W2619205025 creator A5045252920 @default.
• W2619205025 creator A5061787871 @default.
• W2619205025 creator A5067084150 @default.
• W2619205025 creator A5087682711 @default.
• W2619205025 date "2017-06-16" @default.
• W2619205025 modified "2023-09-23" @default.
• W2619205025 title "Thermodynamic Characterization of Hydration Sites from Integral Equation-Derived Free Energy Densities: Application to Protein Binding Sites and Ligand Series" @default.
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