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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...
Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin homology) domains...
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. 
Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...

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Related Experiment Video

Updated: Jul 13, 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

Bacterial mechanosensitive channels: experiment and theory.

Ben Corry1, Boris Martinac

  • 1School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, Crawley, WA 6008, Australia.

Biochimica Et Biophysica Acta
|July 31, 2007
PubMed
Summary

Bacterial mechanosensitive (MS) ion channels, like MscL and MscS, are crucial for cell survival. Research advancements, including structural determination and computational modeling, have deepened our understanding of their function in mechanosensory transduction.

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Related Experiment Videos

Last Updated: Jul 13, 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

Ex Vivo Analysis of Mechanically Activated Ca2+ Transients in Urothelial Cells
05:35

Ex Vivo Analysis of Mechanically Activated Ca2+ Transients in Urothelial Cells

Published on: September 28, 2022

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
07:17

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress

Published on: August 2, 2019

Area of Science:

  • Biophysics
  • Molecular Biology
  • Cell Physiology

Background:

  • Mechanosensitive (MS) ion channels in bacteria, particularly in Escherichia coli, have been extensively studied for two decades.
  • The cloning of MscL (MS channel of Large conductance) and MscS (MS channel of Small conductance) and the determination of their 3D crystal structures were pivotal advancements.

Purpose of the Study:

  • To review the significant progress in understanding bacterial MS ion channels.
  • To highlight the integration of experimental and computational approaches in elucidating channel structure and function.

Main Methods:

  • Patch clamp electrophysiology
  • Molecular biology techniques
  • Electron Paramagnetic Resonance (EPR) spectroscopy
  • Förster Resonance Energy Transfer (FRET) spectroscopy
  • Computational modeling

Main Results:

  • Characterization of bacterial MS channel structure and function.
  • Elucidation of the molecular dynamics of MscL and MscS.
  • Significant contributions to understanding mechanosensory transduction.

Conclusions:

  • The combined experimental and computational studies have greatly advanced the field of bacterial MS channel research.
  • These studies provide fundamental insights into the physical principles governing mechanosensation in biological systems.