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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...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...
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...
Somatosensation01:33

Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
Transducer Mechanism: G Protein–Coupled Receptors01:30

Transducer Mechanism: G Protein–Coupled Receptors

G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
GPCRs are also called heptahelical, 7TM, or...

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Related Experiment Video

Updated: Jun 6, 2026

A Simplified System for Evaluating Cell Mechanosensing and Durotaxis In Vitro
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A Simplified System for Evaluating Cell Mechanosensing and Durotaxis In Vitro

Published on: August 27, 2015

Toward understanding protocell mechanosensation.

Daniel Balleza1

  • 1Unidad de Biofísica, CSIC-UPV/EHU, Universidad del País Vasco, Barrio Sarriena s/n, Leioa, Spain. dballeza.uwisc@gmail.com

Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life
|November 17, 2010
PubMed
Summary

Mechanosensitive channels protect bacteria from bursting by sensing membrane tension. This review explores the evolution of these channels, proposing early mechanisms for osmotic regulation in protocells.

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Area of Science:

  • Biophysics
  • Evolutionary Biology
  • Cell Biology

Background:

  • Mechanosensitive (MS) channels are crucial for bacterial survival during osmotic stress.
  • These channels open in response to increased membrane tension, preventing cell lysis.
  • Understanding their evolutionary origins may shed light on early cellular life and membrane transport.

Purpose of the Study:

  • To investigate the potential evolutionary path of mechanosensitive channels.
  • To identify key factors in the emergence of the first osmotic valves in a prebiotic context.
  • To explore the characteristics of primordial mechanosensitive proteins.

Main Methods:

  • Review of existing literature on lipid bilayer mechanics, peptide aggregation, and protein sequence motifs.
  • Analysis of conserved features in known mechanosensitive channel homologs (MscL, MscS).
  • Hypothetical reconstruction of early osmotic regulatory mechanisms.

Main Results:

  • Lipid bilayer mechanical properties are fundamental to mechanosensation.
  • Peptide aggregation in membranes likely played a role in early channel formation.
  • Conserved sequence motifs suggest evolutionary constraints and functional importance.

Conclusions:

  • The evolution of mechanosensitive proteins likely involved simple lipid-membrane interactions and peptide self-assembly.
  • Primordial osmotic valves may have been less complex than modern MS channels.
  • These findings offer insights into the biophysical basis of early life and membrane integrity.