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Method for the Isolation of Francisella tularensis Outer Membranes
Published on: June 29, 2010
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Isolation of Outer Membrane Vesicles Including Their Quantitative and Qualitative Analyses
Paul Kohl1, Franz G Zingl1, Thomas O Eichmann1
1Institute of Molecular Biosciences, University of Graz, Graz, Austria.
Methods in Molecular Biology (Clifton, N.J.)
|July 27, 2018
Summary
This study details methods for isolating bacterial outer membrane vesicles (OMVs) and performing quality control analyses. These protocols enable comprehensive characterization of OMVs for research applications.
Area of Science:
- Microbiology
- Biochemistry
- Nanotechnology
Background:
- Outer membrane vesicles (OMVs) are naturally released from bacterial cell surfaces.
- OMVs are found in the cell-free supernatant of bacterial cultures.
- Characterizing OMVs is crucial for understanding bacterial communication and pathogenesis.
Purpose of the Study:
- To describe methods for isolating bacterial outer membrane vesicles (OMVs).
- To provide protocols for essential quality control analyses of isolated OMVs.
- To enable robust characterization of OMV composition and properties.
Main Methods:
- Crude and density gradient-purification methods for OMV isolation.
- Protein profiling via SDS-PAGE and immunoblot analysis for indicator proteins.
- Lipid profiling (LC-MS), size determination (NanoSight), biomass estimation (TrayCell™), and component quantification (Bradford, Purpald).
Main Results:
- Established protocols for both crude and purified OMV isolation.
- Detailed methods for comprehensive OMV quality control and characterization.
- Enabled accurate assessment of OMV protein, lipid, and LPS content, as well as size and biomass.
Conclusions:
- The described methods provide a robust framework for OMV isolation and analysis.
- These protocols facilitate standardized and reproducible OMV research.
- Comprehensive OMV characterization is essential for advancing studies in microbiology and related fields.
Keywords:
BradfordDensity gradient purificationImmunoblotLC-MSLipid extractionNanoSightOMVsPurpaldQuantificationSDS-PAGETrayCell™UltracentrifugationMore Related Videos
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