Variable symmetry in Salmonella typhimurium flagellar motors From: Biophysical Journal | Date: January 1, 2003| Author: Dang, Hongyue; DeRosier, David J; Khan, Shahid; Lai, Yimin; Young, Howard S | Copyright Biophysical Society Jan 2003. Provided by ProQuest LLC.Copyright information

ABSTRACT Electron cryomicroscopy of rotor complexes of the Salmonella typhimurium flagellar motor, overproduced in a nonmotile Escherichia coli host, has revealed a variation in subunit symmetry of the cytoplasmic ring (C ring) module. C rings with subunit symmetries ranging from 31 to 38 were found. They formed a Gaussian distribution around a mean between 34 and 35, a similar number to that determined for native C rings. C-ring diameter scaled with the number of subunits, indicating that th...

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