Abstract
Structural analysis of transmembrane proteins remains a challenge in biology, mainly due to their difficulty in being overexpressed and the required use of detergents that impair different steps of biochemistry classically used to obtain 3D crystals. In this context, we have developed a new technique for protein incorporation within supported lipid bilayers that only requires a few picomoles of protein per assay. Proteins are directly inserted into a detergent-destabilized bilayer that can be imaged in buffer with atomic force microscopy (AFM) allowing structural analysis down to sub-nanometer lateral resolution. In this chapter, we describe the main guidelines for this technique, from the choice of detergent to the requirements for AFM high-resolution imaging.
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Acknowledgments
The research has been supported by Institut Curie (DL), CNRS (DL and PEM), and INSERM (P.E.M.) and granted by the ANR grant “ANR-06-PCVI-0021-01, AFM -MB-PROT.” We are grateful to our collaborators involved in the project: Drs. A. Berquand, J. Hernández-Borrell, C. le Grimellec, F. Gubellini, P. Dosset, L. Picas, and B. Seantier.
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Levy, D., Milhiet, PE. (2013). Imaging of Transmembrane Proteins Directly Incorporated Within Supported Lipid Bilayers Using Atomic Force Microscopy. In: Sousa, A., Kruhlak, M. (eds) Nanoimaging. Methods in Molecular Biology, vol 950. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-137-0_19
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DOI: https://doi.org/10.1007/978-1-62703-137-0_19
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