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Protein viscoelastic dynamics: a model system.

Craig Fogle1, Joseph Rudnick1, David Jasnow2

  • 1Department of Physics and Astronomy, UCLA, Box 951547, Los Angeles, California 90095-1547, USA.

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|October 15, 2015
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Summary
This summary is machine-generated.

A new model of folded protein dynamics under sinusoidal force was developed. This model exhibits rich behavior, including dynamical transitions analogous to thermodynamic phase transitions.

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Area of Science:

  • Biophysics
  • Computational Biology
  • Statistical Mechanics

Background:

  • Understanding the dynamics of folded proteins under external forces is crucial for molecular biology.
  • Recent experiments have provided new insights into protein responses to time-dependent forces.

Purpose of the Study:

  • To develop and investigate a simplified model system that captures the essential dynamics of folded proteins under sinusoidal force.
  • To explore the complex behaviors and potential phase transition analogies within this model.

Main Methods:

  • Investigated a model system based on a strongly overdamped oscillator with a force-dependent restoring force.
  • Analyzed the system's response characteristics to sinusoidal forcing.
  • Considered the influence of noise and inertia on the system's dynamics.

Main Results:

  • The model successfully replicated key response characteristics observed in experimental studies of protein dynamics.
  • The system exhibited a series of dynamical transitions.
  • Analogies between the model's transitions and equilibrium thermodynamic phase transitions were identified.

Conclusions:

  • The proposed simple dynamical model provides a valuable framework for understanding complex protein dynamics.
  • The model's ability to show phase transition-like behavior highlights the potential for rich collective phenomena in biological systems.
  • Further investigation into the effects of noise and inertia can refine the model's predictive power.