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Rigidity loss of protein macromolecule induced by force--effective field theory
E Z Meilikhov1, R M Farzetdinova
1Kurchatov Institute, 123182, Moscow, Russia; Department of General Physics, Moscow Institute of Physics and Technology (State University), 9, Institutsky lane, Dolgoprudny, 141707, Russia.
Proteins
|December 11, 2013
Summary
This study explores protein structure changes during mechanical stretching, revealing a transition from elastic to plastic states. Elastic properties depend on force, temperature, and the protein network
Area of Science:
- Biophysics
- Materials Science
- Protein Dynamics
Background:
- Protein structure is crucial for function.
- Mechanical forces can alter protein conformation.
- Understanding protein elasticity is key to biomaterials and disease research.
Purpose of the Study:
- To investigate the phase transition of protein macromolecules from elastic to plastic states under mechanical stretching.
- To analyze how elastic properties are influenced by external factors.
Main Methods:
- Utilizing an effective field theory for the order parameter.
- Modeling protein globule structure deviation from its native state.
- Studying elastic properties as a function of applied force, temperature, and mean coordination number.
Main Results:
- Identified a phase transition from elastic to plastic states in proteins under mechanical load.
- Quantified the influence of force, temperature, and network coordination on protein elasticity.
- Developed a theoretical framework to describe protein mechanical behavior.
Conclusions:
- Protein mechanical behavior, specifically the elastic-to-plastic transition, is controllable by external parameters.
- The effective field theory provides a robust model for protein mechanical responses.
- Findings have implications for protein engineering and understanding mechanobiology.
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