1. Hydrogen Bonding Penalty upon Ligand Binding
- Author
-
Danzhi Huang, Hongtao Zhao, University of Zurich, and Huang, D
- Subjects
Hydrogen ,Science ,Binding energy ,chemistry.chemical_element ,1100 General Agricultural and Biological Sciences ,Ligands ,01 natural sciences ,03 medical and health sciences ,Computational Chemistry ,1300 General Biochemistry, Genetics and Molecular Biology ,Chemical Biology ,10019 Department of Biochemistry ,Biochemical Simulations ,Molecule ,Biology ,030304 developmental biology ,1000 Multidisciplinary ,0303 health sciences ,Multidisciplinary ,Ligand efficiency ,010405 organic chemistry ,Hydrogen bond ,Solvation ,Computational Biology ,Proteins ,Hydrogen Bonding ,Ligand (biochemistry) ,0104 chemical sciences ,Chemistry ,Crystallography ,chemistry ,Docking (molecular) ,Molecular Mechanics ,570 Life sciences ,biology ,Thermodynamics ,Medicine ,Medicinal Chemistry ,Research Article ,Protein Binding - Abstract
Ligand binding involves breakage of hydrogen bonds with water molecules and formation of new hydrogen bonds between protein and ligand. In this work, the change of hydrogen bonding energy in the binding process, namely hydrogen bonding penalty, is evaluated with a new method. The hydrogen bonding penalty can not only be used to filter unrealistic poses in docking, but also improve the accuracy of binding energy calculation. A new model integrated with hydrogen bonding penalty for free energy calculation gives a root mean square error of 0.7 kcal/mol on 74 inhibitors in the training set and of 1.1 kcal/mol on 64 inhibitors in the test set. Moreover, an application of hydrogen bonding penalty into a high throughput docking campaign for EphB4 inhibitors is presented, and remarkably, three novel scaffolds are discovered out of seven tested. The binding affinity and ligand efficiency of the most potent compound is about 300 nM and 0.35 kcal/mol per non-hydrogen atom, respectively.
- Published
- 2011