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Coupled Assays for Monitoring Protein Refolding in Saccharomyces cerevisiae
Published on: July 9, 2013
Switch from thermal to force-driven pathways of protein refolding
Maksim Kouza1, Pham Dang Lan2, Alexander M Gabovich3
1Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
The Journal of Chemical Physics
|April 10, 2017
Summary
Quenched force influences protein refolding pathways. A switch from thermal to force-driven pathways occurs in the middle force regime, aligning with atomic force microscopy experiments.
Area of Science:
- Biophysics
- Computational Biology
- Protein Dynamics
Background:
- Understanding protein folding is crucial for molecular biology.
- Quenched force effects on protein folding are not fully elucidated.
- Simulations offer insights into complex biophysical processes.
Purpose of the Study:
- To investigate the impact of quenched force on protein folding pathways.
- To analyze the free energy landscape under varying force regimes.
- To compare force-driven folding with thermal folding mechanisms.
Main Methods:
- Utilized a coarse-grain Go model for protein simulations.
- Simulated protein refolding under quenched force conditions.
- Identified distinct low, middle, and high force regimes.
Main Results:
- Low force regime folding pathways mirror thermal pathways.
- A transition from thermal to force-driven pathways observed in the middle force regime.
- The denatured to transition state distance (x_f) differs between temperature-driven and force-driven regimes.
Conclusions:
- Protein folding pathways are modulated by applied force.
- The middle force regime bridges thermal and force-dominated folding.
- Simulation results are consistent with atomic force microscopy experimental findings.
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