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Mechanically-gated Ion Channels

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 Channels

Mechanically-gated Ion Channels

Ion Channels

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...

Non-gated Ion Channels

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....

Non-gated Ion Channels

Non-gated Ion Channels

Voltage-gated Ion Channels

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: Mar 21, 2026

One-channel Cell-attached Patch-clamp Recording

One-channel Cell-attached Patch-clamp Recording

Published on: June 9, 2014

Demystifying Mechanosensitive Piezo Ion Channels.

¹Life Sciences Institute and Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, 48109, USA. shawnxu@umich.edu.

Neuroscience Bulletin

|May 12, 2016

Summary

This summary is machine-generated.

New research reveals the atomic structure of Piezo1 channels, offering crucial insights into how these mechanosensitive ion channels function in touch and hearing. This discovery advances our understanding of cellular mechanotransduction.

Keywords:

Cryo-EM Mechanical Mechanosensation Mechanosensory Mechanotransduction Piezo

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Last Updated: Mar 21, 2026

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Published on: June 9, 2014

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Published on: September 28, 2022

Area of Science:

Molecular and Cellular Biology
Biophysics
Structural Biology

Background:

Mechanosensitive ion channels are vital for physiological processes like touch, hearing, and blood pressure regulation.
Piezo proteins (Piezo1 and Piezo2) are a recently identified class of mechanosensitive channels implicated in numerous sensory modalities.
The precise structural basis and gating mechanisms of Piezo channels have remained largely unknown.

Purpose of the Study:

To elucidate the atomic structure of the Piezo1 mechanosensitive channel.
To understand the molecular mechanisms underlying ion permeation through Piezo1.
To investigate the basis of mechano-gating in Piezo1 channels.

Main Methods:

High-resolution cryo-electron microscopy (cryo-EM) was employed to determine the atomic structure of Piezo1.
Biophysical techniques were utilized to assess ion flow and channel gating properties.
Computational modeling may have been used to interpret structural and functional data.

Main Results:

The atomic structure of the Piezo1 channel has been resolved, revealing its unique architecture.
Key structural features related to ion permeation pathways have been identified.
Insights into the conformational changes associated with Piezo1 mechano-gating have been gained.

Conclusions:

The determined structure provides a molecular framework for understanding Piezo1 channel function.
This work sheds light on how mechanical stimuli are converted into electrical signals by Piezo1.
These findings are foundational for future research into Piezo channel physiology and disease.