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Journal Article

Two-dimensional crystallization of a bacterial surface protein on lipid vesicles under controlled conditions

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Paul, A., Engelhardt, H., Jakubowski, U., & Baumeister, W. (1992). Two-dimensional crystallization of a bacterial surface protein on lipid vesicles under controlled conditions. Biophysical Journal, 61(1), 172-188.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-7423-D
Abstract
The solubilized surface protein of the Gram-negative bacterium Comamonas acidovorans was reconstituted on lipid vesicles by means of controlled dialysis. To this end, a multichamber dialysis apparatus was built which allows one to control the temperature and the dialysis rate, to apply various temperatures or buffer systems and sample conditions in a single experiment, and to monitor the turbidity of the sample by means of light scattering. The reconstitution conditions were optimized such that the surface protein formed two-dimensional crystals suitable for electron crystallography. The recrystallized surface protein arrays gave a resolution of approximately 1.3 nm in projection after correlation averaging of negatively stained preparations. The surface protein assembled into partially self-contained two-dimensional crystals which possess a strong shape-determining effect and formed cylinders and various cone-shaped vesicles. The development of the various vesicle forms is described in a model. (54 References).