Journal
BIOCHEMISTRY
Volume 41, Issue 45, Pages 13335-13343Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bi0267137
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- NIGMS NIH HHS [GM56207] Funding Source: Medline
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Experimental and theoretical data imply that enzyme motion plays an important role in enzymatic reactions. Enzyme motion can influence both the activation free energy barrier and the degree of barrier recrossing. A hybrid theoretical approach has been developed for the investigation of the relation between enzyme motion and activity. This approach includes both electronic and nuclear quantum effects. It distinguishes between thermally averaged promoting motions that influence the activation free energy barrier and dynamical motions that influence the barrier recrossings. Applications to hydride transfer in liver alcohol dehydrogenase and dihydrofolate reductase resulted in the identification and characterization of important enzyme motions. These applications have also led to the proposal of a network of coupled promoting motions in enzymatic reactions. These concepts have important implications for protein engineering and drug design.
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