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Protein function in the crystal

A Mozzarelli1, G L Rossi

  • 1Institute of Biochemical Sciences, University of Parma, Italy.

Annual Review of Biophysics and Biomolecular Structure
|January 1, 1996
PubMed
Summary
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Protein crystals, with their solvent channels, enable metabolite transport and movement. Lattice constraints allow studying rare protein states, advancing time-resolved macromolecular crystallography.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Crystallography

Background:

  • Protein crystals possess solvent channels facilitating metabolite transport and molecular motion.
  • Intermolecular forces within crystals can impede protein dynamics and alter enzymatic activity compared to solution states.
  • Crystal lattices offer unique opportunities to stabilize and analyze transient protein conformations.

Purpose of the Study:

  • To explore the implications of crystalline environments on protein function and dynamics.
  • To investigate the potential of lattice constraints in characterizing low-abundance conformational states.
  • To highlight the need for kinetic models in interpreting time-resolved crystallographic data.

Main Methods:

  • Utilizing macromolecular crystallography to study proteins in a crystalline state.

Related Experiment Videos

  • Developing novel techniques for rapid, synchronized initiation of reactions within protein crystals.
  • Employing time-resolved methods to monitor reaction kinetics in situ.
  • Analyzing intermolecular interactions and lattice constraints affecting protein behavior.

    • Main Results:

    • Demonstrated that protein crystals allow for metabolite traffic and intramolecular motility via solvent channels.
    • Identified that while crystal packing can hinder some functional transitions, it also enables the isolation of transient conformational states.
    • Highlighted the development of new methods for initiating and monitoring reactions within crystals.

    Conclusions:

    • Protein crystals provide a unique environment to study protein dynamics and conformational landscapes.
    • Time-resolved macromolecular crystallography, coupled with appropriate kinetic models, is crucial for understanding protein function in crystalline states.
    • Lattice constraints can be leveraged to study functionally relevant, yet solution-unstable, protein conformations.