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基本情報
登録情報 | データベース: PDB / ID: 5vhz | ||||||
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タイトル | GluA2-2xGSG1L bound to L-Quisqualate | ||||||
![]() | Glutamate receptor 2,Germ cell-specific gene 1-like protein | ||||||
![]() | TRANSPORT PROTEIN / Ion channel | ||||||
機能・相同性 | ![]() regulation of AMPA receptor activity / regulation of short-term neuronal synaptic plasticity / spine synapse / dendritic spine neck / dendritic spine head / regulation of postsynaptic neurotransmitter receptor internalization / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity ...regulation of AMPA receptor activity / regulation of short-term neuronal synaptic plasticity / spine synapse / dendritic spine neck / dendritic spine head / regulation of postsynaptic neurotransmitter receptor internalization / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / transmission of nerve impulse / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity / AMPA glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / immunoglobulin binding / asymmetric synapse / regulation of receptor recycling / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / response to fungicide / regulation of synaptic transmission, glutamatergic / glutamate-gated receptor activity / cytoskeletal protein binding / presynaptic active zone membrane / extracellular ligand-gated monoatomic ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / glutamate-gated calcium ion channel activity / somatodendritic compartment / ionotropic glutamate receptor binding / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / ionotropic glutamate receptor signaling pathway / dendrite cytoplasm / SNARE binding / dendritic shaft / PDZ domain binding / synaptic transmission, glutamatergic / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / protein tetramerization / synaptic membrane / establishment of protein localization / synapse organization / postsynaptic density membrane / modulation of chemical synaptic transmission / cerebral cortex development / receptor internalization / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle membrane / synaptic vesicle / signaling receptor activity / presynapse / amyloid-beta binding / presynaptic membrane / growth cone / scaffold protein binding / chemical synaptic transmission / dendritic spine / perikaryon / postsynaptic membrane / neuron projection / postsynaptic density / axon / neuronal cell body / synapse / dendrite / protein-containing complex binding / protein kinase binding / glutamatergic synapse / cell surface / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 8.4 Å | ||||||
![]() | Twomey, E.C. / Yelshanskaya, M.V. / Grassucci, R.A. / Frank, J. / Sobolevsky, A.I. | ||||||
![]() | ![]() タイトル: Structural Bases of Desensitization in AMPA Receptor-Auxiliary Subunit Complexes. 著者: Edward C Twomey / Maria V Yelshanskaya / Robert A Grassucci / Joachim Frank / Alexander I Sobolevsky / ![]() 要旨: Fast excitatory neurotransmission is mediated by AMPA-subtype ionotropic glutamate receptors (AMPARs). AMPARs, localized at post-synaptic densities, are regulated by transmembrane auxiliary subunits ...Fast excitatory neurotransmission is mediated by AMPA-subtype ionotropic glutamate receptors (AMPARs). AMPARs, localized at post-synaptic densities, are regulated by transmembrane auxiliary subunits that modulate AMPAR assembly, trafficking, gating, and pharmacology. Aberrancies in AMPAR-mediated signaling are associated with numerous neurological disorders. Here, we report cryo-EM structures of an AMPAR in complex with the auxiliary subunit GSG1L in the closed and desensitized states. GSG1L favors the AMPAR desensitized state, where channel closure is facilitated by profound structural rearrangements in the AMPAR extracellular domain, with ligand-binding domain dimers losing their local 2-fold rotational symmetry. Our structural and functional experiments suggest that AMPAR auxiliary subunits share a modular architecture and use a common transmembrane scaffold for distinct extracellular modules to differentially regulate AMPAR gating. By comparing the AMPAR-GSG1L complex structures, we map conformational changes accompanying AMPAR recovery from desensitization and reveal structural bases for regulation of synaptic transmission by auxiliary subunits. | ||||||
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 713.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 550.2 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 836.6 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 939.3 KB | 表示 | |
XML形式データ | ![]() | 103.6 KB | 表示 | |
CIF形式データ | ![]() | 151.9 KB | 表示 | |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 117471.211 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: 化合物 | ChemComp-QUS / ( Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: GluA2-2xGSG1L bound to L-Quisqualate cryo-EM density タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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分子量 | 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 8 |
試料 | 濃度: 5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: GluA2-2xGSG1L bound to L-Quisqualate |
試料支持 | 詳細: Gold-gold grids, hydrogen and oxygen glow discharge (20s, 10 watts, 6.4 sccm H2, 27.5 sccm O2) グリッドの材料: GOLD / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: C-flat-1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 295 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Tecnai Polara / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI POLARA 300 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 67 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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対称性 | 点対称性: C2 (2回回転対称) |
3次元再構成 | 解像度: 8.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 51130 / 対称性のタイプ: POINT |