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Updated: Jun 29, 2026
09:42
Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
Published on: January 16, 2016
Protein and solvent dynamics: how strongly are they coupled?
G Caliskan1, D Mechtani, J H Roh
1Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, USA.
The Journal of Chemical Physics
|July 21, 2004
Summary
Protein dynamics, including fluctuations and vibrations, closely mirror solvent dynamics across a wide temperature range. This finding explains why glycerol is an effective biological cryopreservant.
Area of Science:
- Biophysics
- Protein Dynamics
- Spectroscopy
Background:
- Protein dynamics are crucial for biological function.
- Solvent properties significantly influence protein behavior.
- Understanding protein-solvent interactions is key for cryopreservation.
Purpose of the Study:
- To investigate the relationship between protein and solvent dynamics.
- To elucidate the role of solvents in protein conformational fluctuations and vibrations.
- To explain observations regarding protein relaxation in different solvent states.
Main Methods:
- Raman spectroscopy analysis.
- Neutron scattering spectra analysis.
- Temperature-dependent measurements from 100-350 K.
Main Results:
- Lysozyme protein dynamics were found to follow solvent dynamics (glycerol and trehalose) across the entire temperature range.
- Protein's fast conformational fluctuations and low-frequency vibrations are highly sensitive to solvent behavior.
- Protein relaxation is more pronounced in solid trehalose than in liquid glycerol.
Conclusions:
- Protein dynamics are intrinsically linked to the dynamics of surrounding solvents.
- The observed protein-solvent coupling provides insight into cryoprotectant effectiveness.
- Glycerol's efficacy as a biological cryopreservant is supported by these findings.
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