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Related Concept Videos

Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
Ion Channels01:19

Ion Channels

The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
Mechanical Protein Functions01:58

Mechanical Protein Functions

Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
Regulation of Bacterial Virulence01:28

Regulation of Bacterial Virulence

Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...

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Related Experiment Video

Updated: Jul 11, 2026

Multifunctional, Micropipette-based Method for Incorporation And Stimulation of Bacterial Mechanosensitive Ion Channels in Droplet Interface Bilayers
09:54

Multifunctional, Micropipette-based Method for Incorporation And Stimulation of Bacterial Mechanosensitive Ion Channels in Droplet Interface Bilayers

Published on: November 19, 2015

Physiological analysis of bacterial mechanosensitive channels.

Ian R Booth1, Michelle D Edwards, Susan Black

  • 1School of Medical Sciences, University of Aberdeen, Institute of Medical Sciences, Foresterhill, Aberdeen, United Kingdom.

Methods in Enzymology
|September 19, 2007
PubMed
Summary

Bacterial mechanosensitive (MS) channels protect cells from osmotic shock by rapidly ejecting solutes. This prevents cell damage when bacteria are moved to dilute solutions, ensuring survival.

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Multifunctional, Micropipette-based Method for Incorporation And Stimulation of Bacterial Mechanosensitive Ion Channels in Droplet Interface Bilayers
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Published on: November 19, 2015

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Published on: February 10, 2014

Area of Science:

  • Microbiology
  • Cell Biology
  • Biophysics

Background:

  • Bacteria face hypoosmotic shock when diluted into low-solute environments.
  • Sudden water influx can reach osmotic imbalances of 10-14 atm.
  • Bacterial cell walls and membranes have limited expansion capacity.

Purpose of the Study:

  • To describe cellular assays for measuring mechanosensitive (MS) channel function.
  • To provide guidance on interpreting the results of these assays.

Main Methods:

  • Cellular assays are used to assess MS channel activity.
  • Interpretation of assay results is crucial for understanding channel function.

Main Results:

  • Mechanosensitive channels are essential for bacterial survival under hypoosmotic stress.
  • Rapid solute ejection via MS channels is a key protective mechanism.
  • Cellular assays provide a means to study these protective functions.

Conclusions:

  • Mechanosensitive channels are critical for bacterial osmoregulation.
  • Understanding MS channel function through cellular assays aids in comprehending cell survival strategies.
  • These channels represent a vital defense against osmotic challenges.