Bacterial flagellar motor
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What does the bacterial flagellar motor turn?
Why does a bacterium need its flagellar motor to reverse?
The E. coli flagellar motor runs on an inward flow of protons; the Vibrio polar flagellar motor runs on an inward flow of blank.
What subunits make one stator unit of the flagellar motor, and how are they arranged?
In the flagellar motor stator unit, what two jobs does MotB do?
Phosphorylated CheY reverses the flagellar motor by binding the N-terminus of blank on the C-ring.
About how much torque does a fully induced E. coli flagellar motor give at high load?
The flagellar rotor takes 26 steps per turn at low driving force. Why can those steps no longer be read as one step per FliG?
What proposed (not yet done) way could build a stronger flagellar motor, copying how nature raises torque?
In the E. coli flagellar stator unit, which residue takes up the incoming proton?
In the proposed model of the flagellar stator, each ion turns the MotA ring about 36°, so blank ions turn MotA once.
In the Deme model of the flagellar stator, why do ions always push the MotA ring the same way?
Torque is force times lever. What force and lever radius give each enteric flagellar stator unit its torque of about 146 pN·nm?
In the flagellar motor, what part does the rod spin inside as it passes through the cell wall and outer membrane?
When CheY-P binds the flagellar C-ring, how do the FliG domains move, and what does that change for the stator units?
MotA keeps turning clockwise in both states of the flagellar motor. Why does moving its contact from the outer to the inner face of the FliG ring reverse the rotor?
Why do more stator units bind the flagellar motor when the load rises?
About how far does a swimming bacterium coast after its flagellar motors stop?
The flagellar motor is like a car with a reverse gear. Where does that analogy break?
About how many protons pass through the flagellar motor of Streptococcus per rotor turn?
Which part of the flagellar motor resembles the F1 α and β subunits of ATP synthase?
How did Reid and colleagues measure the torque of single E. coli flagellar motors?
In "resurrection" experiments on paralysed E. coli flagellar motors, how was the number of stator units counted?
Near zero load, how does the speed of the E. coli flagellar motor depend on the number of stator units?
At 23 °C the torque of the E. coli flagellar motor stays roughly constant up to a knee near blank, then falls to zero near 350 Hz.
What did the occasional backward steps of the slowed flagellar motor (Sowa et al. 2005) show about each step?
Cluzel et al. found a Hill coefficient of about 10 for the flagellar switch; Yuan and Berg found 16.5–20.7. Why the difference?
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