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Updated: May 1, 2026
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Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
Published on: January 16, 2016
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Heavy enzymes--experimental and computational insights in enzyme dynamics
Katarzyna Swiderek1, J Javier Ruiz-Pernía2, Vicent Moliner2
1Departamento de Química Física, Universitat de València, 46100 Burjassot, Spain; Institute of Applied Radiation Chemistry, Lodz University of Technology, 90-924 Lodz, Poland.
Current Opinion in Chemical Biology
|April 9, 2014
Summary
Protein motions influence enzyme catalysis. Isotopically substituted enzymes help quantify these motions, impacting reaction rates according to the Born-Oppenheimer approximation and Transition State Theory.
Area of Science:
- Biochemistry
- Chemical Kinetics
- Enzyme Catalysis
Background:
- The precise role of protein dynamics in the chemical step of enzyme catalysis remains debated.
- Understanding these dynamics is crucial for enzyme mechanism elucidation.
Purpose of the Study:
- To systematically review and discuss experimental and theoretical studies on protein motions in enzyme catalysis.
- To quantify the contribution of protein motions to the reaction rate constant.
Main Methods:
- Utilizing isotopically substituted enzymes to probe the effects of altered protein mass on reaction rates.
- Applying the principles of the Born-Oppenheimer approximation to theoretical analysis.
- Framing the discussion within Transition State Theory.
Main Results:
- Altering protein mass via isotopic substitution modifies vibrational frequencies without changing forces.
- These frequency changes can significantly affect the observed reaction rate constants.
- Experimental and theoretical data support the influence of protein motions.
Conclusions:
- Isotopically substituted enzymes are a powerful tool for dissecting the role of protein dynamics in enzymatic reactions.
- Protein motions demonstrably influence the chemical step of catalysis, impacting reaction rates.
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