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SNARE-mediated Fusion of Single Proteoliposomes with Tethered Supported Bilayers in a Microfluidic Flow Cell Monitored by Polarized TIRF Microscopy
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1Department of Cellular and Molecular Physiology,Yale University School of Medicine, 2Nanobiology Institute,Yale University, 3Department of Molecular Biophysics and Biochemistry,Yale University, 4Laboratoire de Neurophotonique, Université Paris Descartes, Faculté des Sciences Fondamentales et Biomédicales,Centre National de la Recherche Scientifique (CNRS)
Chapters
- 00:05Title
- 01:01Preparation of a PDMS Block to Form the Microfluidic Channel
- 03:17Formation of the Tethered Supported Bilayer
- 06:18Checking Bilayer Fluidity
- 07:06Introducing v-SUVs into the Microfluidic Channels
- 07:59Observing the Fusion of Single v-SUVs and the SBL
- 08:42Results: Docking and Fusion Events Described by Lipid and Content Release
- 10:26Conclusion
Here, we present a protocol to detect single, SNARE-mediated fusion events between liposomes and supported bilayers in microfluidic channels using polarized TIRFM, with single molecule sensitivity and ~15 msec time resolution. Lipid and soluble cargo release can be detected simultaneously. Liposome size, lipid diffusivity, and fusion pore properties are measured.
