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Related Concept Videos

Flagella and Motility in Bacteria01:18

Flagella and Motility in Bacteria

Flagella are specialized, thread-like structures that extend from a bacteria's cell envelope. They play a crucial role in motility and chemotaxis. Their structural organization and functioning exemplify sophisticated biological engineering, enabling bacterial survival and adaptability in diverse environments.Structure of the FlagellumA bacterial flagellum consists of three key components: the filament, the hook, and basal body. The filament, a long, helical structure composed of repeating...
Microtubules in Cell Motility01:24

Microtubules in Cell Motility

Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
Microtubules in Cell Motility01:24

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Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
Mechanism of Ciliary Motion01:05

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The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
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Mechanism of Ciliary Motion01:05

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The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
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Actin Polymerization and Cell Motility01:13

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate.

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Related Experiment Video

Updated: Jun 15, 2026

Biophysical Characterization of Flagellar Motor Functions
06:08

Biophysical Characterization of Flagellar Motor Functions

Published on: January 18, 2017

Tuning the flagellar motor.

Kai M Thormann1, Anja Paulick1

  • 1Department of Ecophysiology, Max-Planck-Institut für Terrestrische Mikrobiologie, Marburg, Germany.

Microbiology (Reading, England)
|March 6, 2010
PubMed
Summary
This summary is machine-generated.

Bacteria use flagellar motors for motility, powered by ion gradients. This review explores how dynamic stator systems allow motors to adapt to changing environments, enhancing bacterial survival.

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Area of Science:

  • Microbiology and Molecular Biology
  • Bacterial Motility and Biomechanics

Background:

  • Bacterial flagella are rotating helical filaments enabling motility, crucial for survival.
  • Flagellar motors function via proton or sodium-ion gradients, generating torque.
  • The motor comprises a rotating switch complex and cell-wall-associated stators.

Purpose of the Study:

  • To review recent findings on bacterial flagellar motor rotor-stator interactions.
  • To explore the differential roles of multiple stator systems in various bacterial species.
  • To understand the regulatory mechanisms governing stator selection and motor tuning.

Main Methods:

  • Literature review of recent studies on bacterial flagellar motors.
  • Analysis of experimental findings on rotor-stator dynamics and stator function.
  • Synthesis of emerging models for flagellar motor regulation.

Main Results:

  • Numerous bacteria possess multiple stator systems for a single flagellar motor.
  • Different stators contribute uniquely to flagellar rotation speed and torque.
  • Stator swapping is proposed as a mechanism for dynamic motor adaptation.

Conclusions:

  • Bacterial flagellar motors are not static but are dynamically tunable.
  • Stator selection and swapping allow adaptation to diverse environmental conditions.
  • This adaptability enhances bacterial survival and optimizes motility.