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Related Experiment Videos

Modelling protein unfolding: hen egg-white lysozyme

M A Williams1, J M Thornton, J M Goodfellow

  • 1Department of Crystallography, Birkbeck College, London, UK.

Protein Engineering
|August 1, 1997
PubMed
Summary

Researchers used a novel modeling method to study hen egg-white lysozyme unfolding. This protein unfolding process reveals domain decoupling and a molten globule-like state, offering insights into complex folding pathways.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • Protein unfolding is crucial for understanding protein function and misfolding diseases.
  • Hen egg-white lysozyme is a well-characterized model protein for studying folding dynamics.

Purpose of the Study:

  • To investigate the unfolding pathway of hen egg-white lysozyme using a novel computational approach.
  • To elucidate the structural changes and intermediate states during protein unfolding.

Main Methods:

  • A novel modeling procedure was employed to simulate protein unfolding by enhancing solvent penetration.
  • The method allowed for rapid unfolding and detailed observation of structural transitions.

Main Results:

  • The study identified early disruption of tertiary contacts, leading to domain decoupling.
  • A molten globule-like state was observed, retaining intact native beta-sheets.
  • Modelled structures showed similarities to experimentally characterized partially folded states of lysozyme.

Conclusions:

  • The novel modeling procedure provides insights into the complex unfolding process of hen egg-white lysozyme.
  • The unfolding pathway of multidomain proteins can resemble their fastest folding pathways.

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