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Microfluidic Mixers for Studying Protein Folding
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Stochastic Resonance in Protein Folding Dynamics.

Aram Davtyan1, Max Platkov2, Martin Gruebele3

  • 1Department of Chemistry and Institute for Biophysical Dynamics, Computation Institute, James Franck Institute, University of Chicago, Chicago, Illinois, 60637, USA.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|March 19, 2016
PubMed
Summary
This summary is machine-generated.

Protein folding is accelerated by environmental fluctuations, mimicking cellular conditions. This study confirms stochastic resonance enhances protein folding kinetics, a phenomenon observed in condensed-matter physics.

Keywords:
Förster resonance energy transferbrownian dynamicsmolecular dynamicsprotein foldingstochastic resonance

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Area of Science:

  • Biophysics
  • Chemical Physics
  • Computational Biology

Background:

  • Proteins typically fold under static conditions in vitro, yet cellular environments fluctuate in vivo.
  • Understanding protein folding dynamics in fluctuating environments is crucial for biological function.

Purpose of the Study:

  • To investigate the effect of environmental fluctuations on protein folding kinetics.
  • To explore the phenomenon of stochastic resonance in protein folding.
  • To experimentally validate theoretical predictions using model proteins.

Main Methods:

  • Coarse-grained molecular simulations to model folding under modulated temperature.
  • Experimental probing of phosphoglycerate kinase folding using Förster resonance energy transfer (FRET).
  • Development of stochastic simulations and analytical mean-field kinetic theory for data analysis.

Main Results:

  • Both periodic and correlated environmental fluctuations accelerate protein folding kinetics.
  • Acceleration occurs when fluctuation frequencies match the protein's internal folding timescale.
  • Experimental results for phosphoglycerate kinase align with stochastic resonance predictions.

Conclusions:

  • Environmental fluctuations can enhance protein folding rates, supporting in vivo relevance.
  • Stochastic resonance is experimentally confirmed as a mechanism influencing protein folding dynamics.
  • This finding has implications for understanding protein behavior in complex cellular systems.