Abstract:
:The directional properties of hydrogen bonds play a major role in determining the specificity of intermolecular interactions. An energy function which takes explicit account of these properties has been developed for use in the determination of energetically favorable ligand binding sites on molecules of known structure by the GRID method (Goodford, P.J.J. Med. Chem. 1985, 28, 849. Boobbyer, D.N.A.; Goodford, P.J.; McWhinnie, P.M.; Wade, R.C.J. Med. Chem. 1989, 32, 1083). In this method, the interaction energy between a target molecule and a small chemical group (a probe), which may be part of a larger ligand, was calculated using an energy function consisting of Lennard-Jones, electrostatic, and hydrogen bond terms. The latter term was a function of the length of the hydrogen bond, its orientation at the hydrogen-bonding atoms, and their chemical nature. We now describe hydrogen bond energy functions which take account of the spatial distribution of the hydrogen bonds made by probes with the ability to form two hydrogen bonds. These functions were designed so as to model the experimentally observed angular dependence of the hydrogen bonds. We also describe the procedure to locate the position and orientation of the probe at which the interaction energy is optimized. The use of this procedure is demonstrated by examples of biological and pharmacological interest which show that it can produce results that are consistent with other theoretical approaches and with experimental observations.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Wade RC,Clark KJ,Goodford PJdoi
10.1021/jm00053a018subject
Has Abstractpub_date
1993-01-08 00:00:00pages
140-7issue
1eissn
0022-2623issn
1520-4804journal_volume
36pub_type
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