Antibiotics pp 159-174 | Cite as

Measurement of Cell Membrane Fluidity by Laurdan GP: Fluorescence Spectroscopy and Microscopy

  • Kathi Scheinpflug
  • Oxana Krylova
  • Henrik Strahl
Part of the Methods in Molecular Biology book series (MIMB, volume 1520)


Membrane fluidity is a critical parameter of cellular membranes which cells continuously strive to maintain within a viable range. An interference with the correct membrane fluidity state can strongly inhibit cell function. Triggered changes in membrane fluidity have been postulated to contribute to the mechanism of action of membrane targeting antimicrobials, but the corresponding analyses have been hampered by the absence of readily available analytical tools. Here, we provide detailed protocols that allow straightforward measurement of antibiotic compound-triggered changes in membrane fluidity both in vivo and in vitro.

Key words

Membrane fluidity Membrane viscosity Lipid domains Lipid packing Fatty acid disorder Laurdan Lipid adaptation Membrane targeting antimicrobials 



This work was supported by Wellcome Trust Institutional Strategic Support Funds (ISSF), and by Newcastle University.


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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Kathi Scheinpflug
    • 1
  • Oxana Krylova
    • 1
  • Henrik Strahl
    • 2
  1. 1.Department of Chemical BiologyLeibniz-Institut für Molekulare Pharmakologie (FMP)BerlinGermany
  2. 2.Centre for Bacterial Cell Biology, Institute for Cell and Molecular BiosciencesNewcastle UniversityNewcastle upon TyneUK

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