Journal article
The stability of a [beta]-hairpin is altered by surface-water interactions under confinement
The journal of physical chemistry. B, v 118(13), p3517
03 Apr 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Understanding protein folding and stability in in vivo confined environments is a challenging problem from both experimental and computational points of views. Despite recent insights, an appreciation and complete understanding of how the solvent influences the structure and stability of proteins under complex confined environments is still lacking. Here, using all-atom molecular dynamics simulations in explicit solvent, we report the effects of confinement on the lifetime of a metastable beta-hairpin structure in the A beta(21-30) decapeptide. Our results show that the values of these lifetimes depend on the nature of the confining surface, where smooth and rough hydrophobic confining walls have solvent-mediated stabilizing and destabilizing effects, respectively. The source of the destabilization found inside atomically rough confining walls lies in surface-peptide interactions that break the beta-hairpin in this peptide, whereas smooth confining walls stabilize it by forming well-ordered layers of water that keep the decapeptide solvated in the inner part of the pore and away from the surface. In addition, we show that the size of the confining pore can tune the value of the lifetimes where pore sizes comparable to the size of the decapeptide have the largest effects.
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Details
- Title
- The stability of a [beta]-hairpin is altered by surface-water interactions under confinement
- Creators
- J. Srinivasa Rao - Drexel UniversityMicholas Dean Smith - Drexel UniversityLuis Cruz - Drexel University
- Publication Details
- The journal of physical chemistry. B, v 118(13), p3517
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Pharmacology and Physiology
- Web of Science ID
- WOS:000333948200005
- Scopus ID
- 2-s2.0-84898068333
- Other Identifier
- 991019296915804721
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InCites Highlights
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- Web of Science research areas
- Chemistry, Physical