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Hydrogen bonding in human p450-substrate interactions: a major contribution to binding affinity.
1School of Biomedical and Molecular Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, UK. d.lewis@surrey.ac.uk
Thescientificworldjournal
|January 6, 2005
Summary
Hydrogen bonding significantly impacts drug metabolism by influencing P450 enzyme-substrate affinity. Simple calculations accurately predict these interactions, aiding in drug development.
Area of Science:
- Biochemistry
- Pharmacology
- Computational Chemistry
Background:
- Hydrogen bonding is a crucial intermolecular force in biological systems.
- Cytochrome P450 enzymes are vital for drug and xenobiotic metabolism.
- Understanding enzyme-substrate interactions is key to predicting drug efficacy and toxicity.
Purpose of the Study:
- To investigate the role of hydrogen bonding in P450 enzyme-substrate affinity.
- To evaluate the accuracy of empirical calculations for hydrogen bond parameters.
- To develop methods for estimating the contribution of hydrogen bonding to binding affinity.
Main Methods:
- Calculation of hydrogen bond distances and energies using empirical relationships.
- Modeling P450 enzyme-substrate interactions.
- Comparison of calculated values with experimental findings.
Main Results:
- Empirical calculations of hydrogen bond distances and energies closely match experimental data.
- Hydrogen bonding significantly contributes to P450 substrate binding affinity.
- The study demonstrates the utility of simple formulae for estimating this contribution.
Conclusions:
- Hydrogen bonding is a key determinant of P450 enzyme-substrate affinity.
- Empirical calculation methods provide reliable estimates of hydrogen bonding contributions.
- These findings can inform drug design and metabolism prediction, especially when combined with lipophilicity data.