help button home button Biophys. J.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS

Biophysical Journal 52: 413-419 (1987)
© 1987 the Biophysical Society

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Meister, M
Right arrow Articles by Berg, H C
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Meister, M
Right arrow Articles by Berg, H C

The stall torque of the bacterial flagellar motor.

M Meister and H C Berg

Department of Cellular and Developmental Biology, Harvard University, Cambridge, Massachusetts 02138.

ABSTRACT

The bacterial flagellar motor couples the flow of protons across the cytoplasmic membrane to the rotation of a helical flagellar filament. Using tethered cells, we have measured the stall torque required to block this rotation and compared it with the torque of the running motor over a wide range of values of proton-motive force and pH. The stall torque and the running torque vary identically: both appear to saturate at large values of the proton-motive force and both decrease at low or high pH. This suggests that up to speeds of approximately 5 Hz the operation of the motor is not limited by the mobility of its internal components or the rates of proton transfer reactions coupled to flagellar rotation.




This article has been cited by other articles:


Home page
 Biophys. JHome page
C.-J. Lo, M. C. Leake, T. Pilizota, and R. M. Berry
Nonequivalence of Membrane Voltage and Ion-Gradient as Driving Forces for the Bacterial Flagellar Motor at Low Load
Biophys. J., July 1, 2007; 93(1): 294 - 302.
[Abstract] [Full Text] [PDF]

Home page
 J. Bacteriol.Home page
T. F. Braun, S. Poulson, J. B. Gully, J. C. Empey, S. Van Way, A. Putnam, and D. F. Blair
Function of Proline Residues of MotA in Torque Generation by the Flagellar Motor of Escherichia coli
J. Bacteriol., June 1, 1999; 181(11): 3542 - 3551.
[Abstract] [Full Text]

Home page
 ScienceHome page
D. Blair and H. Berg
Restoration of torque in defective flagellar motors
Science, December 23, 1988; 242(4886): 1678 - 1681.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1987 by the Biophysical Society.