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• W2005204865 endingPage "2586" @default.
• W2005204865 startingPage "2571" @default.
• W2005204865 abstract "Intermolecular interactions in the aqueous phase must compete with the interactions between the two binding partners and their solvating water molecules. In biological systems, water molecules in protein binding sites cluster at well-defined hydration sites and can form strong hydrogen-bonding interactions with backbone and side-chain atoms. Displacement of such water molecules is only favorable when the ligand can form strong compensating hydrogen bonds. Conversely, water molecules in hydrophobic regions of protein binding sites make only weak interactions, and the requirements for favorable displacement are less stringent. The propensity of water molecules for displacement can be identified using inhomogeneous fluid solvation theory (IFST), a statistical mechanical method that decomposes the solvation free energy of a solute into the contributions from different spatial regions and identifies potential binding hotspots. In this study, we employed IFST to study the displacement of water molecules from the ATP binding site of Hsp90, using a test set of 103 ligands. The predicted contribution of a hydration site to the hydration free energy was found to correlate well with the observed displacement. Additionally, we investigated if this correlation could be improved by using the energetic scores of favorable probe groups binding at the location of hydration sites, derived from a multiple copy simultaneous search (MCSS) method. The probe binding scores were not highly predictive of the observed displacement and did not improve the predictivity when used in combination with IFST-based hydration free energies. The results show that IFST alone can be used to reliably predict the observed displacement of water molecules in Hsp90. However, MCSS can augment IFST calculations by suggesting which functional groups should be used to replace highly displaceable water molecules. Such an approach could be very useful in improving the hit-to-lead process for new drug targets." @default.
• W2005204865 created "2016-06-24" @default.
• W2005204865 creator A5000950100 @default.
• W2005204865 creator A5085683300 @default.
• W2005204865 date "2013-10-15" @default.
• W2005204865 modified "2023-09-26" @default.
• W2005204865 title "Combining Solvent Thermodynamic Profiles with Functionality Maps of the Hsp90 Binding Site to Predict the Displacement of Water Molecules" @default.
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• W2005204865 doi "https://doi.org/10.1021/ci4003409" @default.
• W2005204865 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3840717" @default.
• W2005204865 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24070451" @default.
• W2005204865 hasPublicationYear "2013" @default.
• W2005204865 type Work @default.
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• W2005204865 citedByCount "40" @default.

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