関連する実験動画
Updated: Mar 31, 2026
10:34
A High-content Assay for Monitoring AMPA Receptor Trafficking
Published on: January 28, 2019
8.2K
スターガジンは,AMPA受容体のシナプス標的を2つの異なるメカニズムによって調節する
L Chen1, D M Chetkovich, R S Petralia
1Department of Cellular and Molecular Pharmacology, University of California, San Francisco 94143, USA.
Nature
|January 5, 2001
まとめ
スターガザーのマウスは,変異したスターガジンタンパク質のため,機能的なアルファ-アミノ-3-ヒドロキシル-5-メチル-4-イソクサゾロプロピオネート (AMPA) 受容体を持たない. このタンパク質は,AMPA受容体を細胞表面に届け,中枢神経系のシナプスに標的にするために不可欠です.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- スターガザーマウス変異種は,脳小粒細胞のAMPA受容体の欠乏に関連したアタキシアとを発症します.
- Stargazerマウスのタンパク質であるスターガジンは,AMPA受容体サブユニットとシナプスPDZタンパク質と相互作用することが知られている.
研究 の 目的:
- AMPA受容体の密輸とシナプス標的化におけるスターガジンの役割を調査する.
- AMPA受容体の局所化のためのスターガジン媒介メカニズムが異なるニューロン集団にわたって保存されているかどうかを決定する.
主な方法:
- スターガザーマウスの小脳小粒細胞におけるAMPA受容体の局所化の分析.
- スターガジン,AMPA受容体サブユニット,PDZタンパク質 (PSD-95など) の間の生化学相互作用に関する研究.
- 海馬のピラミッド細胞におけるPDZ結合ドメインが欠けている変異性スターガジンの発現.
主要な成果:
- スターガジンのAMPA受容体サブユニットとの相互作用は,表面膜配送に不可欠です.
- スターガジンのPDZ結合ドメインは,PSD-95および関連するタンパク質との相互作用を通じて,AMPA受容体をシナプスに標的にするために不可欠です.
- PDZ結合ドメインが欠けている変異性スターガジンを発現する海馬細胞のシナプスAMPA受容体の障害.
結論:
- スターガジンは,AMPA受容体トランスファーとシナプスアンカリングにおいて重要な二重の役割を果たします.
- シナプスAMPA受容体のターゲティングにスターガジンが関与するメカニズムは,中枢神経系全体に保存されている可能性が高い.
さらに関連する動画
07:51Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
Published on: November 14, 2014
18.0K
12:58Imaging pHluorin-tagged Receptor Insertion to the Plasma Membrane in Primary Cultured Mouse Neurons
Published on: November 20, 2012
13.7K
関連する概念動画
01:26Chemical Synapses
8.7K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.7K
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
4.8K
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...
4.8K
01:12GPCR Desensitization
8.7K
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...
8.7K
01:19Ligand-gated Ion Channels
15.5K
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...
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...
15.5K
01:26Chemical Synapses
12.4K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
12.4K
01:26Neurochemical Transmission: Sites of Drug Action
3.9K
Neurochemical transmission, the conduction of electrical impulses between neurons mediated by neurotransmitters, plays a vital role in various physiological processes. Autonomic drugs exert their effects by modulating neurotransmission within the autonomic nervous system. For instance, drugs such as hemicholinium block the precursor uptake necessary for synthesizing acetylcholine, an essential autonomic neurotransmitter. Following synthesis, neurotransmitters are stored in vesicles. Metyrosine...
3.9K