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09:22
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
Chirality and equilibrium biopolymer bundles.
Gregory M Grason1, Robijn F Bruinsma
1Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90024, USA.
Physical Review Letters
|October 13, 2007
Summary
Chirality controls biopolymer aggregation, forming stable hexagonal bundles. This phenomenon arises from elastic stresses, not long-range forces, offering insights into F-actin organization.
Area of Science:
- Biophysics
- Polymer Physics
- Thermodynamics
Background:
- Biopolymer aggregation is crucial for cellular function.
- Chirality's role in self-assembly is not fully understood.
- Previous studies observed hexagonal bundles of F-actin.
Purpose of the Study:
- To elucidate the role of chirality in biopolymer aggregation.
- To explain the formation of hexagonal bundles.
- To identify the thermodynamic control parameters governing this process.
Main Methods:
- Application of continuum theory.
- Analysis of thermodynamic control parameters.
- Investigation of elastic stresses in ordered chains.
Main Results:
- Chirality acts as a key thermodynamic control parameter.
- Stable hexagonal bundles form under specific solvent conditions.
- Bundle radius is determined by shear elastic stresses, not long-range interactions.
Conclusions:
- Chirality drives the formation of stable, hexagonal biopolymer bundles.
- The observed bundle radius is a result of chiral torque and nonlinear gauge terms in the strain tensor.
- This provides a theoretical framework for understanding F-actin self-assembly.
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