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Related Experiment Videos

Drying-induced hydrophobic polymer collapse.

Pieter Rein ten Wolde1, David Chandler

  • 1Department of Chemistry, University of California, Berkeley, CA 94720, USA.

Proceedings of the National Academy of Sciences of the United States of America
|May 2, 2002
PubMed
Summary
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Hydrophobic chain collapse in water resembles a first-order phase transition. Water evaporation drives collapse, with vapor bubble nucleation being the rate-limiting step in this simulation study.

Area of Science:

  • Computational chemistry
  • Biophysics
  • Polymer science

Background:

  • Understanding polymer behavior in aqueous solutions is crucial for various scientific fields.
  • Hydrophobic interactions play a significant role in the folding and assembly of biomolecules like proteins.

Purpose of the Study:

  • To investigate the mechanism of hydrophobic chain collapse in water using computer simulations.
  • To elucidate the driving forces and rate-limiting steps involved in this process.

Main Methods:

  • Application of transition path sampling techniques.
  • Utilizing a coarse-grained model for liquid water.
  • Performing extensive computer simulations.

Main Results:

Related Experiment Videos

  • The collapse mechanism closely mimics a first-order phase transition.
  • Water evaporation near the polymer acts as the primary driving force.
  • The nucleation of a critical-sized vapor bubble is identified as the rate-limiting step.

    • Conclusions:

    • The findings provide insights into the fundamental processes governing hydrophobic interactions.
    • This study enhances our understanding of protein folding and assembly mechanisms.
    • The simulation methodology offers a powerful tool for studying complex molecular phenomena.