Quartz crystal microbalance with dissipation monitoring of supported lipid bilayers on various substrates

Nat Protoc. 2010 Jun;5(6):1096-106. doi: 10.1038/nprot.2010.65. Epub 2010 May 20.

Abstract

Supported lipid bilayers (SLBs) mimic biological membranes and are a versatile platform for a wide range of biophysical research fields including lipid-protein interactions, protein-protein interactions and membrane-based biosensors. The quartz crystal microbalance with dissipation monitoring (QCM-D) has had a pivotal role in understanding SLB formation on various substrates. As shown by its real-time kinetic monitoring of SLB formation, QCM-D can probe the dynamics of biomacromolecular interactions. We present a protocol for constructing zwitterionic SLBs supported on silicon oxide and titanium oxide, and discuss technical issues that need to be considered when working with charged lipid compositions. Furthermore, we explain a recently developed strategy that uses an amphipathic, alpha-helical (AH) peptide to form SLBs on gold and titanium oxide substrates. The protocols can be completed in less than 3 h.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biophysical Phenomena
  • Biosensing Techniques / methods*
  • Gold
  • Lipid Bilayers / chemistry*
  • Membrane Fusion
  • Oxides
  • Peptides / chemistry
  • Protein Structure, Secondary
  • Quartz
  • Silicon Compounds
  • Surface Plasmon Resonance / methods
  • Titanium

Substances

  • Lipid Bilayers
  • Oxides
  • Peptides
  • Silicon Compounds
  • Quartz
  • titanium dioxide
  • silicon monoxide
  • Gold
  • Titanium