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Submillisecond kinetics of protein folding
W A Eaton1, V Muñoz, P A Thompson
1Laboratory of Chemical Physics, Building 5, National Institute of Diabetes, Digestive, and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520, USA. eaton@helix.nih.gov
Current Opinion in Structural Biology
|February 1, 1997
Summary
New experimental methods allow scientists to observe protein folding and unfolding dynamics on the nanosecond-microsecond timescale. These advances help establish the fundamental times for protein folding motions, estimating a minimum folding time of approximately one microsecond.
Area of Science:
- Biochemistry
- Molecular Biology
- Physical Chemistry
Background:
- Protein folding is crucial for biological function.
- Understanding the kinetics of protein folding is a long-standing challenge.
- Previous experimental methods were limited in temporal resolution.
Purpose of the Study:
- To investigate protein folding and unfolding dynamics.
- To establish the timescale of elementary motions in protein folding.
- To estimate the minimum possible time for protein folding.
Main Methods:
- Utilizing novel experimental techniques.
- Observing protein dynamics on the nanosecond-microsecond timescale.
- Analyzing elementary motions like secondary structure formation, loop formation, and hydrophobic collapse.
Main Results:
- Enabled observation of protein folding/unfolding on previously inaccessible timescales.
- Began establishing kinetic parameters for key folding events.
- Provided an estimate for the shortest possible protein folding time.
Conclusions:
- Nanosecond-microsecond timescale observations are feasible.
- These methods provide insights into the fundamental steps of protein folding.
- The shortest protein folding time is estimated to be around one microsecond.