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. 1985 Sep;61:191–202. doi: 10.1289/ehp.8561191

Molecular electrostatic potentials: an effective tool for the elucidation of biochemical phenomena.

P Politzer, P R Laurence, K Jayasuriya
PMCID: PMC1568763  PMID: 2866089

Abstract

The electrostatic potential V(r) that is created in the space around a molecule by its nuclei and electrons (treated as static distributions of charge) is a very useful property for analyzing and predicting molecular reactive behavior. It is rigorously defined and can be determined experimentally as well as computationally. The potential has been particularly useful as an indicator of the sites or regions of a molecule to which an approaching electrophile is initially attracted, and it has also been applied successfully to the study of interactions that involve a certain optimum relative orientation of the reactants, such as between a drug and its cellular receptor. A variety of methods for calculating V(r) is available, at different levels of rigor. For large biologically active molecules, multipole expansions and superposition of potentials computed for subunits have been found to be effective. A large number of chemical and biochemical systems and processes have now been studied in terms of electrostatic potentials. Three examples of such applications are surveyed in this paper. These deal with: (a) reactive properties of nucleic acids, including their component bases; (b) biological recognition processes, including drug-receptors and enzyme-substrate interactions; and (c) chemical carcinogenesis, referring specifically to the polycyclic aromatic hydrocarbons and halogenated olefins and their epoxides. For each of these areas, examples of the use of electrostatic potentials in elucidating structure-activity patterns are given.

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Selected References

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