Rotation of Escherichia coli F(1)-ATPase.

By applying the same method used for F(1)-ATPase (TF(1)) from thermophilic Bacillus PS3 (Noji, H., Yasuda, R., Yoshida, M., and Kinosita, K., Jr. (1997) Nature 386, 299-302), we observed ATP-driven rotation of a fluorescent actin filament attached to the gamma subunit in Escherichia coli F(1)-ATPase. The torque value and the direction of the rotation were the same as those observed for TF(1). F(1)-ATPases seem to share common properties of rotation irrespective of the sources.

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