PMID:8772185

Citation	Takeyasu, K, Omote, H, Nettikadan, S, Tokumasu, F, Iwamoto-Kihara, A and Futai, M (1996) Molecular imaging of Escherichia coli F0F1-ATPase in reconstituted membranes using atomic force microscopy. FEBS Lett. 392:110-3
Abstract	The structure of Escherichia coli F0F1-ATPase (ATP synthase), and its F0 sector reconstituted in lipid membranes was analyzed using atomic force microscopy (AFM) by tapping-mode operation. The majority of F0F1-ATPases were visualized as spheres with a calculated diameter of approximately 90 angstroms, and a height of approximately 100 angstroms from the membrane surface. F0 sectors were visualized as two different ring-like structures (one with a central mass and the other with a central hollow of greater than or equal to 18 angstroms depth) with a calculated outer diameter of approximately 130 angstroms. The two different images possibly represent the opposite orientations of the complex in the membranes. The ring-like projections of both images suggest inherently asymmetric assemblies of the subunits in the F0 sector. Considering the stoichiometry of F0 subunits, the area of the image observed is large enough to accommodate all three F0 subunits in an asymmetric manner.
Links	PubMed
Keywords	Cell Membrane/enzymology; Escherichia coli/enzymology; Membrane Proteins/chemistry; Microscopy, Atomic Force; Proton-Translocating ATPases/chemistry
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