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関連する概念動画

Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

4.3K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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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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Non-gated Ion Channels01:24

Non-gated Ion Channels

8.4K
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....
8.4K
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

6.0K
GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
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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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Ligand-gated Ion Channels01:19

Ligand-gated Ion Channels

14.6K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
14.6K

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Updated: Feb 25, 2026

One-channel Cell-attached Patch-clamp Recording
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スナップショット:チャネルゲーティングメカニズム

Marcel P Goldschen-Ohm1, Baron Chanda2

  • 1Department of Neuroscience, University of Wisconsin-Madison, Madison, WI 53706, USA.

Cell
|July 29, 2017
PubMed
まとめ
この要約は機械生成です。

この研究は,活性化メカニズムに基づいてイオンチャネルファミリーを分類する. この3つの主要なクラスの特徴とその規制戦略を詳細に説明しています.

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科学分野:

  • 分子生物学
  • バイオ物理学
  • 細胞生理学

背景:

  • イオンチャネルはイオン流を調節する重要な膜タンパク質です.
  • 細胞の機能において重要な役割を果たす 複数のイオンチャネルファミリーが存在します
  • イオンチャネルの分類と調節を理解することは,生理学において根本的なものです.

研究 の 目的:

  • アクティベーションメカニズムに基づくイオンチャネルファミリーの分類を提示する.
  • この3つの主要なイオンチャネルクラスを区別する重要な特徴を強調します.
  • 一般的なイオンチャネル調節モードの概要を提示する.

主な方法:

  • イオンチャネル分類に関する既存の知識の文献レビューと合成.
  • 活性化経路に基づいた異なるイオンチャネルファミリーの比較分析.
  • イオンチャネル機能に影響を与える共通の規制メカニズムに関する情報の収集.

主要な成果:

  • イオンチャネルは,活性化メカニズムによって,3つの主要なクラスに分類されます.
  • 3つのクラスにはそれぞれ 構造的・機能的な特徴がある.
  • イオンチャネルを制御する一般的原理が概説されている.

結論:

  • アクティベーションに基づくイオンチャネルの明確な分類枠組みは不可欠です.
  • 細胞のシグナル伝達を理解するのに役立ちます.
  • この概要は,イオンチャネル研究のための基本的なリソースとして機能します.