Curvature sorting of peripheral proteins on solid-supported wavy membranes |
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Authors: | Wan-Ting Hsieh Chih-Jung Hsu Benjamin R Capraro Tingting Wu Chi-Mon Chen Shu Yang Tobias Baumgart |
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Institution: | Department of Chemistry and ?Department of Materials Science and Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States. |
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Abstract: | Cellular membrane deformation and the associated redistribution of membrane-bound proteins are important aspects of membrane function. Current model membrane approaches for studying curvature sensing are limited to positive curvatures and often require complex and delicate experimental setups. To overcome these challenges, we fabricated a wavy substrate by imposing a range of curvatures onto an adhering lipid bilayer membrane. We examined the curvature sorting of several peripheral proteins binding to the wavy membrane and observed them to partition into distinct regions of curvature. Furthermore, single-molecule imaging experiments suggested that the curvature sensing of proteins on low-curvature substrates requires cooperative interactions. |
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