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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...
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...
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...
Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...

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Related Experiment Video

Updated: Jun 15, 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

Eukaryotic mechanosensitive channels.

Jóhanna Arnadóttir1, Martin Chalfie

  • 1Department of Biological Sciences, Columbia University, New York, New York 10027, USA. ja653@columbia.edu

Annual Review of Biophysics
|March 3, 2010
PubMed
Summary
This summary is machine-generated.

Mechanosensitive ion channels convert physical forces into electrical signals. While bacterial channels are well-characterized, confirming eukaryotic mechanosensitive channels requires rigorous standards, with several channel types now meeting these criteria.

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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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Area of Science:

  • Biophysics
  • Molecular Biology
  • Cell Physiology

Background:

  • Mechanosensitive ion channels are crucial for cellular responses to physical stimuli.
  • Defining and confirming mechanosensitive channels, especially in eukaryotes, has been challenging.
  • Bacterial mechanosensitive channels serve as a benchmark for gating criteria.

Purpose of the Study:

  • To review and consolidate evidence for mechanically gated ion channels in eukaryotic systems.
  • To highlight the diverse families of channels exhibiting mechanosensitivity.
  • To discuss the structural requirements for mechanosensitive channel function.

Main Methods:

  • Literature review of studies investigating ion channel gating mechanisms.
  • Analysis of experimental data supporting mechanical gating in various channel families.
  • Examination of structural and cellular components involved in mechanotransduction.

Main Results:

  • Several eukaryotic channel families, including TRP, K(2P), MscS-like, and DEG/ENaC, show strong evidence of being mechanosensitive.
  • Rigorous criteria for mechanical gating are being met by an increasing number of eukaryotic channels.
  • The plasma membrane plays a significant role, with potential contributions from intracellular and extracellular structures.

Conclusions:

  • The diversity of confirmed eukaryotic mechanosensitive ion channels is expanding.
  • Further research is needed to fully elucidate the gating mechanisms and structural basis.
  • Mechanosensitive channels are integral to cellular mechanotransduction pathways.