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Related Experiment Videos

Trapping reaction intermediates in macromolecular crystals for structural analyses.

B L Stoddard1

  • 1Division of Basic Sciences, Program in Structural Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, A3-023, Seattle, Washington 98109, USA. bstoddar@fhcrc.org

Methods (San Diego, Calif.)
|June 1, 2001
PubMed
Summary

Time-resolved crystallography enables studying transient molecular states during reactions like enzymatic catalysis. This review covers methods for initiating reactions and trapping short-lived intermediates for structural analysis.

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Area of Science:

  • Biophysics
  • Structural Biology
  • Biochemistry

Background:

  • Macromolecular reactions involve transient intermediates crucial for function.
  • Studying these intermediates structurally provides insights into reaction mechanisms.
  • Traditional methods struggle to capture short-lived species.

Purpose of the Study:

  • To review time-resolved crystallographic techniques for studying reaction intermediates.
  • To discuss methods for initiating reactions and trapping transient species within crystals.
  • To highlight the technical considerations for X-ray data collection on these species.

Main Methods:

  • Time-resolved X-ray crystallography.
  • Reaction initiation techniques: substrate diffusion, photolysis.

Related Experiment Videos

  • Trapping of reaction intermediates within protein or ribozyme crystals.
  • Rapid X-ray diffraction data collection.

    • Main Results:

    • Enables visualization of discrete structural species during macromolecular reactions.
    • Accommodates a range of intermediate lifetimes, from nanoseconds to longer.
    • Provides a framework for understanding enzymatic catalysis, ribozyme cleavage, and photocyles.

    Conclusions:

    • Time-resolved crystallography is a powerful tool for elucidating reaction mechanisms.
    • Advances in reaction initiation and data collection are key to success.
    • This approach bridges the gap between static structures and dynamic biological processes.