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Improving 2D and 3D Skin In Vitro Models Using Macromolecular Crowding
Published on: August 22, 2016
Macromolecular crowding induces polypeptide compaction and decreases folding cooperativity.
Douglas Tsao1, Nikolay V Dokholyan
1Department of Chemistry, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.
Physical Chemistry Chemical Physics : PCCP
|April 2, 2010
Summary
Cellular crowding significantly impacts protein folding. Simulations show that macromolecules increase protein compaction but hinder cooperative folding, potentially trapping proteins in non-native states.
Area of Science:
- Biochemistry
- Molecular Biology
- Computational Biology
Background:
- The intracellular environment is highly crowded, with macromolecules occupying up to 40% of cellular volume.
- This macromolecular crowding can significantly influence protein stability, dynamics, and reaction rates.
Purpose of the Study:
- To investigate the effects of crowding reagents on protein thermodynamic and folding properties.
- To understand how crowder size and number influence protein behavior in a crowded cellular milieu.
Main Methods:
- Utilizing discrete molecular dynamics (DMD) simulations.
- Analyzing the impact of varying crowder sizes and numbers on protein structure and folding thermodynamics.
Main Results:
- Crowding induces increased protein compaction.
- Protein folding becomes less cooperative in the presence of crowders.
- Crowders can promote alternative non-native protein conformations.
Conclusions:
- Macromolecular crowding alters protein folding landscapes.
- Crowding can create kinetic barriers, impeding efficient protein folding in cells.
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