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基本情報
登録情報 | データベース: PDB / ID: 4uq6 | ||||||
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タイトル | Electron density map of GluA2em in complex with LY451646 and glutamate | ||||||
![]() | GLUTAMATE RECEPTOR 2 | ||||||
![]() | TRANSPORT PROTEIN / MEMBRANE PROTEIN / ION CHANNEL | ||||||
機能・相同性 | ![]() spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / kainate selective glutamate receptor activity ...spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / 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 / asymmetric synapse / immunoglobulin binding / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / glutamate receptor binding / 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 / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / ionotropic glutamate receptor binding / dendrite membrane / 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 / postsynaptic density membrane / modulation of chemical synaptic transmission / cerebral cortex development / receptor internalization / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle membrane / synaptic vesicle / presynapse / signaling receptor activity / 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: 12.8 Å | ||||||
![]() | Meyerson, J.R. / Kumar, J. / Chittori, S. / Rao, P. / Pierson, J. / Bartesaghi, A. / Mayer, M.L. / Subramaniam, S. | ||||||
![]() | ![]() タイトル: Structural mechanism of glutamate receptor activation and desensitization. 著者: Joel R Meyerson / Janesh Kumar / Sagar Chittori / Prashant Rao / Jason Pierson / Alberto Bartesaghi / Mark L Mayer / Sriram Subramaniam / ![]() 要旨: Ionotropic glutamate receptors are ligand-gated ion channels that mediate excitatory synaptic transmission in the vertebrate brain. To gain a better understanding of how structural changes gate ion ...Ionotropic glutamate receptors are ligand-gated ion channels that mediate excitatory synaptic transmission in the vertebrate brain. To gain a better understanding of how structural changes gate ion flux across the membrane, we trapped rat AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid) and kainate receptor subtypes in their major functional states and analysed the resulting structures using cryo-electron microscopy. We show that transition to the active state involves a 'corkscrew' motion of the receptor assembly, driven by closure of the ligand-binding domain. Desensitization is accompanied by disruption of the amino-terminal domain tetramer in AMPA, but not kainate, receptors with a two-fold to four-fold symmetry transition in the ligand-binding domains in both subtypes. The 7.6 Å structure of a desensitized kainate receptor shows how these changes accommodate channel closing. These findings integrate previous physiological, biochemical and structural analyses of glutamate receptors and provide a molecular explanation for key steps in receptor gating. | ||||||
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構造の表示
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 419.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 323.9 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 794.8 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 818.1 KB | 表示 | |
XML形式データ | ![]() | 62.8 KB | 表示 | |
CIF形式データ | ![]() | 100.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 2684MC ![]() 2680C ![]() 2685C ![]() 2686C ![]() 2687C ![]() 2688C ![]() 2689C ![]() 4uqjC ![]() 4uqkC ![]() 4uqqC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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類似構造データ |
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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: 92625.578 Da / 分子数: 4 / 断片: RESIDUES 22-847 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P19491 #2: 化合物 | ChemComp-GLU / 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 / タイプ: COMPLEX |
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緩衝液 | pH: 8 |
試料 | 濃度: 1.8 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: HOLEY CARBON |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 詳細: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS / 日付: 2013年8月1日 |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 47000 X / 倍率(補正後): 47000 X / 最大 デフォーカス(公称値): 3500 nm / 最小 デフォーカス(公称値): 2000 nm |
撮影 | 電子線照射量: 25 e/Å2 フィルム・検出器のモデル: FEI FALCON II (4k x 4k) |
画像スキャン | デジタル画像の数: 1566 |
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解析
EMソフトウェア |
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CTF補正 | 詳細: EACH PARTICLE | |||||||||||||||||||||
対称性 | 点対称性: C2 (2回回転対称) | |||||||||||||||||||||
3次元再構成 | 解像度: 12.8 Å / 粒子像の数: 16050 詳細: SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2684. (DEPOSITION ID: 12579). 対称性のタイプ: POINT | |||||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT / 空間: REAL / 詳細: METHOD--RIGID BODY REFINEMENT PROTOCOL--X-RAY | |||||||||||||||||||||
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精密化 | 最高解像度: 12.8 Å | |||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 12.8 Å
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