The Bacterial Flagellar Hook: Difference between revisions

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	The bacterial flagellar hook described in this article is one part of the bacterial flagellum. Please see [[Flagella, bacterial]] for an overview of where the hook fits in the flagellum.		The '''bacterial flagellar hook''' described in this article is one part of the bacterial flagellum. Please see [[Flagella, bacterial]] for an overview of where the hook fits in the flagellum.

	The flagellar hook is a molecular [http://en.wikipedia.org/wiki/Universal_joint universal joint] that transmits [http://en.wikipedia.org/wiki/Torque torque] from the motor, anchored in the bacterial cell wall, to the [[Flagellar filament of bacteria\|flagellar filament]], the relatively rigid helical rod that propels the bacterial cell when rotated. The hook is flexible: it enables the filament to adopt a wide range of angles relative to the motor axis and cell wall, yet continue to be rotated by the motor at all these angles.		The flagellar hook is a molecular [http://en.wikipedia.org/wiki/Universal_joint universal joint] that transmits [http://en.wikipedia.org/wiki/Torque torque] from the motor, anchored in the bacterial cell wall, to the [[Flagellar filament of bacteria\|flagellar filament]], the relatively rigid helical rod that propels the bacterial cell when rotated. The hook is flexible: it enables the filament to adopt a wide range of angles relative to the motor axis and cell wall, yet continue to be rotated by the motor at all these angles.