Growth of Protein 2-D Crystals on Supported Planar Lipid Bilayers Imagedin Situby AFM |
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Authors: | Ilya Reviakine Wilma Bergsma-Schutter Alain Brisson |
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Affiliation: | Department of Biophysical Chemistry, GBB, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands |
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Abstract: | Theories of crystallization, both in 3-D and 2-D, are still very limited, mainly due to the scarcity of experimental approaches providing pertinent data on elementary phenomena. We present here a novel experimental approach for following, in real time andin situ, the process of 2-D crystallization of proteins on solid supports. Using annexin V as a model of a protein binding by affinity to a lipid matrix, we show that 2-D crystals of proteins can be formed on supported planar lipid bilayers (SPBs). Atomic Force Microscopy (AFM) enables the process of 2-D crystal growth to be visualized. The submolecular organization of the crystals was characterized at a resolution of ≈ 2 nanometers, and defects, hitherto not observed in protein crystals, were resolved. These results have potential applications in basic and applied sciences. |
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Keywords: | protein 2-D crystallization atomic force microscopy supported planar lipid bilayers annexin V crystal growth. |
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