Volume 100, Issue 6 pp. 1136-1152

Ensemble-averaged variational transition state theory with optimized multidimensional tunneling for enzyme kinetics and other condensed-phase reactions

Donald G. Truhlar

Corresponding Author

Donald G. Truhlar

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USASearch for more papers by this author
Jiali Gao

Jiali Gao

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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Mireia Garcia-Viloca

Mireia Garcia-Viloca

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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Cristobal Alhambra

Cristobal Alhambra

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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Jose Corchado

Jose Corchado

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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Maria Luz Sanchez

Maria Luz Sanchez

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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Tina D. Poulsen

Tina D. Poulsen

Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St., S.E., Minneapolis, Minnesota 55455-0431, USA

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First published: 30 August 2004
Citations: 118

Abstract

This paper provides an overview of a new method developed to include quantum mechanical effects and free energy sampling in calculations of reaction rates in enzymes. The paper includes an overview of variational transition state theory with optimized multidimensional tunneling for simple gas-phase reactions and then shows how this is extended to incorporate free energy effects and to include protein motions in the reaction coordinate by ensemble averaging. Finally we summarize recent comparisons to experiment for primary and secondary kinetic isotope effects for proton and hydride transfer reactions catalyzed by enzymes. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004

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