Torque and rotation rate of the bacterial flagellar motor.

Abstract:

:This paper describes an analysis of microscopic models for the coupling between ion flow and rotation of bacterial flagella. In model I it is assumed that intersecting half-channels exist on the rotor and the stator and that the driving ion is constrained to move together with the intersection site. Model II is based on the assumption that ion flow drives a cycle of conformational transitions in a channel-like stator subunit that are coupled to the motion of the rotor. Analysis of both mechanisms yields closed expressions relating the torque M generated by the flagellar motor to the rotation rate v. Model I (and also, under certain assumptions, model II) accounts for the experimentally observed linear relationship between M and v. The theoretical equations lead to predictions on the relationship between rotation rate and driving force which can be tested experimentally.

journal_name

Biophys J

journal_title

Biophysical journal

authors

Läuger P

doi

10.1016/S0006-3495(88)83065-0

subject

Has Abstract

pub_date

1988-01-01 00:00:00

pages

53-65

issue

1

eissn

0006-3495

issn

1542-0086

pii

S0006-3495(88)83065-0

journal_volume

53

pub_type

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