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Diffusion-collision model for the folding kinetics of the lambda-repressor operator-binding domain.

D Bashford1, D L Weaver, M Karplus

  • 1Department of Physics Tufts University, Medford, MA 02155.

Journal of Biomolecular Structure & Dynamics
|March 1, 1984
PubMed
Summary
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This study applies the diffusion-collision model to analyze the folding pathways and kinetics of the lambda-repressor

Area of Science:

  • Protein folding dynamics
  • Biophysics
  • Structural biology

Background:

  • The lambda-repressor's operator-binding domain features five alpha-helices and an N-terminal arm.
  • Its structure, characterized by a hydrophobic core and interacting helices, is suitable for folding studies.

Purpose of the Study:

  • To formulate and apply the diffusion-collision model for proteins with multiple microdomains.
  • To analyze folding pathways and kinetics of the lambda-repressor's operator-binding domain.

Main Methods:

  • Utilized the diffusion-collision model.
  • Formulated basic model elements for multi-microdomain proteins.
  • Applied the model to folding pathways consistent with crystal structure data.

Related Experiment Videos

Main Results:

  • Determined overall folding kinetics.
  • Characterized the time-dependence of intermediate folding states.
  • Investigated the influence of microdomain stability on folding kinetics.

Conclusions:

  • The diffusion-collision model provides a framework for understanding the folding of multi-microdomain proteins like the lambda-repressor.
  • Microdomain stability is a key parameter influencing protein folding pathways and kinetics.