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Related Concept Videos

Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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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...
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Ion Channels01:19

Ion Channels

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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...
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Non-gated Ion Channels01:24

Non-gated Ion Channels

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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.
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Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

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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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Electrochemical Gradient and Channel Proteins: An Overview01:21

Electrochemical Gradient and Channel Proteins: An Overview

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An electrochemical gradient is a fundamental concept in biology and chemistry. It regulates the movement of ions across cell membranes. This movement is influenced by two factors:
The electrical gradient: The electrical gradient across cell membranes refers to the difference in electric charge between the inside and outside of a cell.  This difference drives the movement of ions towards or away from the cells. For instance, if the inside of the cell is more negatively charged relative to...
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Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

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The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
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Related Experiment Video

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Recapitulation of an Ion Channel IV Curve Using Frequency Components
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Progress in ciliary ion channel physiology.

Juan Lorenzo Pablo1,2,3, Paul G DeCaen4, David E Clapham5,2,3

  • 1Howard Hughes Medical Institute, Boston Children's Hospital, Boston, MA 02115.

The Journal of General Physiology
|December 22, 2016
PubMed
Summary
This summary is machine-generated.

Mammalian cilia, essential cell appendages, differ in structure and function. This review explores ion channels in primary and motile cilia, crucial for cell signaling and fluid movement.

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Last Updated: Mar 9, 2026

Recapitulation of an Ion Channel IV Curve Using Frequency Components
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Determination of the Relative Cell Surface and Total Expression of Recombinant Ion Channels Using Flow Cytometry
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Area of Science:

  • Cell Biology
  • Biophysics

Background:

  • Mammalian cells possess cilia, apical appendages critical for cellular functions.
  • Two main types exist: immotile primary cilia (9+0 structure) and motile cilia (9+2 structure).
  • Primary cilia act as signaling hubs, sequestering transcription factors, while motile cilia drive fluid movement.

Purpose of the Study:

  • To review the composition of ion channels in primary and motile cilia.
  • To discuss the proposed functions of these ion channels and associated periciliary membrane proteins.
  • To differentiate ion channel roles in general cilia from specialized sensory cilia.

Main Methods:

  • Literature review focusing on ion channels in mammalian cilia.
  • Analysis of structural and functional distinctions between primary and motile cilia.
  • Synthesis of current research on ion channel localization and function within cilia.

Main Results:

  • Ion channels are integral components of both primary and motile cilia.
  • Specific ion channels are implicated in the signaling and transport functions of cilia.
  • The periciliary membrane also harbors key ion-channel-related proteins.

Conclusions:

  • Ion channels play diverse and vital roles in mammalian cilia.
  • Understanding ciliary ion channel composition is key to deciphering cellular processes.
  • Further research into ciliary ion channels can reveal therapeutic targets.