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Microfluidic Mixers for Studying Protein Folding
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Protein folding as a jamming transition.

Alex T Grigas1,2, Zhuoyi Liu3,2, Jack A Logan3

  • 1Graduate Program in Computational Biology and Bioinformatics, Yale University, New Haven, Connecticut, 06520, USA.

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|May 27, 2024
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Summary
This summary is machine-generated.

Scientists developed a new geometric model explaining protein core packing and stability. This model reveals a jamming transition at high hydrophobic interactions, accurately predicting protein structures.

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Area of Science:

  • Protein biophysics and structural biology.
  • Computational modeling and simulation.

Background:

  • Protein stability is governed by the densely packed hydrophobic core.
  • Experimental measurements show a universal core packing fraction.

Purpose of the Study:

  • To develop a geometric, all-atom model explaining protein core packing fraction.
  • To investigate the relationship between hydrophobic interactions, temperature, and protein stability.
  • To assess the model's ability to predict native-like protein structures.

Main Methods:

  • Development of a geometric, all-atom protein model.
  • Analysis of core packing fraction and its relation to hydrophobic interactions and temperature.
  • Simulations to refold proteins from partially unfolded states.

Main Results:

  • The model explains the experimentally observed universal protein core packing fraction.
  • A novel jamming transition is identified when core packing fraction exceeds a critical value due to increased hydrophobic interactions relative to temperature.
  • The model accurately recapitulates global protein structures, refolding native-like conformations from unfolded states.

Conclusions:

  • Geometric principles govern protein core packing and stability.
  • Hydrophobic interactions and temperature drive a jamming transition in protein folding.
  • The developed model provides insights into protein structure and folding dynamics.