Isolation of Outer Membrane Vesicles Including Their Quantitative and Qualitative Analyses

  • Paul Kohl
  • Franz G. Zingl
  • Thomas O. Eichmann
  • Stefan SchildEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1839)


Outer membrane vesicles (OMVs) are naturally secreted from the bacterial cell surface and therefore localized in the cell-free supernatant of bacterial cultures. Here we describe methods for crude and density gradient-purified OMV isolation and protocols for control analyses for protein profiling (SDS-PAGE), detection of indicator proteins (immunoblot analysis), lipid profiling (lipid extraction and LC-MS analysis), vesicle size determination (NanoSight), rough estimation of biomass (TrayCell™), as well as quantifications of defined OMV components, e.g., proteins (Bradford) and LPS (Purpald).

Key words

OMVs Ultracentrifugation Density gradient purification Quantification NanoSight TrayCell™ Bradford Purpald SDS-PAGE Immunoblot Lipid extraction LC-MS 



This work was supported by the Austrian FWF grants P25691 to S.S. and W901-B12 (DK Molecular Enzymology) to P.K., F.Z., and S.S. as well as BioTechMed Graz (Flagship project “Secretome”).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Paul Kohl
    • 1
  • Franz G. Zingl
    • 1
  • Thomas O. Eichmann
    • 1
  • Stefan Schild
    • 1
    • 2
    Email author
  1. 1.Institute of Molecular BiosciencesUniversity of GrazGrazAustria
  2. 2.BioTechMedGrazAustria

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