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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

2.1K
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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G Protein-coupled Receptors01:15

G Protein-coupled Receptors

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G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
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GPCR Desensitization01:12

GPCR Desensitization

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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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G-protein Coupled Receptors01:21

G-protein Coupled Receptors

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G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
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関連する実験動画

Updated: May 31, 2025

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
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Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors

Published on: November 14, 2014

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人間の脳からのネイティブGABAA受容体構造の解消

Jia Zhou1, Colleen M Noviello1, Jinfeng Teng1

  • 1Department of Neurobiology, University of California San Diego, La Jolla, CA, USA.

Nature
|January 22, 2025
PubMed
まとめ

研究者は,ヒトの患者からのネイティブGABAA受容体 (γ-アミノバター酸受容体) の構造を特定した. これは新しい薬の標的と 阻害シナプスの相互作用を明らかにします

さらに関連する動画

Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission
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Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking
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Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking

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関連する実験動画

Last Updated: May 31, 2025

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
07:51

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors

Published on: November 14, 2014

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Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission
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Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission

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Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking
11:57

Using an α-Bungarotoxin Binding Site Tag to Study GABA A Receptor Membrane Localization and Trafficking

Published on: March 28, 2014

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科学分野:

  • 神経科学
  • 分子生物学
  • 薬理学について

背景:

  • A型GABA (γ-アミノバター酸) 受容体 (GABAA受容体) は,脳内の急速な阻害信号伝達に不可欠である.
  • 19つの関連サブユニットからなる複合ペンタメリックリガンドゲートイオンチャネルである.
  • ヒトの天然のGABAA受容体の組成と構造に関する以前の理解は,間接的な方法に依存していた.

研究 の 目的:

  • 人間の脳内のネイティブGABAA受容体のサブユニット配置と3D構造を決定する.
  • 以前のネイティブとリコンビネント受容体研究における不一致を解決する.
  • 原生GABAA受容体との薬物相互作用と補助サブユニットの関連性を調査する.

主な方法:

  • ヒトの患者からα1サブユニットを含むGABAA受容体の分離.
  • 高解像度3D構造の決定のための冷凍電子顕微鏡
  • 相互作用するタンパク質を特定するためのプロテオミクスと構造分析

主要な成果:

  • 人間のGABAA受容体に対する12のネイティブサブユニットアセンブリとその3D構造を定義した.
  • 以前未定義のサブユニットインターフェースと薬物結合部位を特定した.
  • 予期せぬ抗薬の活性が 発見され ベンゾジアゼピン結合部位に 局所化された
  • 補助サブユニットであるニューロリジン2およびGARLH4との相互作用が示唆される.

結論:

  • ヒトのネイティブGABAA受容体の最初の構造的基礎を提供する.
  • 抗薬の作用メカニズムを 分子レベルで説明します
  • 阻害信号伝達に不可欠なシナプスの補助タンパク質とGABAA受容体の新しい相互作用を明らかにします.