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Related Experiment Videos

Lipidic cubic phases as matrices for membrane protein crystallization.

Peter Nollert1

  • 1deCODE genetics, BioStructures Group, 7869 NE Day RdW, Bainbridge Island, WA 98110, USA. pnollert@decode.com

Methods (San Diego, Calif.)
|August 25, 2004
PubMed
Summary

This review details membrane protein crystallization using the lipidic cubic phase method. It offers specific protocols for bacteriorhodopsin preparation, incorporation into lipidic cubic phases, and subsequent crystal growth.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Membrane Protein Crystallization

Background:

  • Membrane proteins are crucial for cellular functions but challenging to crystallize.
  • The lipidic cubic phase (LCP) method offers a promising approach for membrane protein crystallization.
  • Bacteriorhodopsin serves as a model system for developing LCP crystallization protocols.

Purpose of the Study:

  • To provide detailed, hands-on protocols for the crystallization of bacteriorhodopsin using the LCP method.
  • To outline procedures for bacteriorhodopsin preparation and its incorporation into lipidic cubic phases.
  • To guide biochemists and crystallographers in successfully growing bacteriorhodopsin crystals.

Main Methods:

  • Monomerization of bacteriorhodopsin from purple membrane using octylglucoside and gel filtration chromatography.

Related Experiment Videos

  • Selective extraction of bacteriorhodopsin after pre-treatment with dodecyl-trimethylammonium bromide.
  • Incorporation of bacteriorhodopsin into lipidic cubic phases via vial mixing or coupled syringes.
  • Crystallization of bacteriorhodopsin in the lipidic matrix by salt addition or solution overlay.

    • Main Results:

    • Established specific protocols for each step of bacteriorhodopsin LCP crystallization.
    • Demonstrated successful incorporation of bacteriorhodopsin into lipidic cubic phases.
    • Provided methods for inducing crystal formation in the lipidic matrix.

    Conclusions:

    • The lipidic cubic phase method is a viable technique for bacteriorhodopsin crystallization.
    • Detailed protocols facilitate the successful crystallization of this important membrane protein.
    • This review serves as a comprehensive resource for researchers aiming to crystallize membrane proteins using LCP.