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基本情報
登録情報 | データベース: PDB / ID: 4uqq | ||||||
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タイトル | Electron density map of GluK2 desensitized state in complex with 2S,4R-4-methylglutamate | ||||||
![]() | GLUTAMATE RECEPTOR IONOTROPIC, KAINATE 2 | ||||||
![]() | TRANSPORT PROTEIN / MEMBRANE PROTEIN / ION CHANNEL | ||||||
機能・相同性 | ![]() mossy fiber rosette / detection of cold stimulus involved in thermoception / Activation of Na-permeable kainate receptors / kainate selective glutamate receptor complex / Activation of Ca-permeable Kainate Receptor / regulation of short-term neuronal synaptic plasticity / glutamate receptor activity / negative regulation of synaptic transmission, glutamatergic / ubiquitin conjugating enzyme binding / regulation of JNK cascade ...mossy fiber rosette / detection of cold stimulus involved in thermoception / Activation of Na-permeable kainate receptors / kainate selective glutamate receptor complex / Activation of Ca-permeable Kainate Receptor / regulation of short-term neuronal synaptic plasticity / glutamate receptor activity / negative regulation of synaptic transmission, glutamatergic / ubiquitin conjugating enzyme binding / regulation of JNK cascade / inhibitory postsynaptic potential / receptor clustering / modulation of excitatory postsynaptic potential / kainate selective glutamate receptor activity / extracellularly glutamate-gated ion channel activity / ionotropic glutamate receptor complex / positive regulation of synaptic transmission / behavioral fear response / neuronal action potential / glutamate-gated receptor activity / glutamate-gated calcium ion channel activity / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / presynaptic modulation of chemical synaptic transmission / dendrite cytoplasm / hippocampal mossy fiber to CA3 synapse / SNARE binding / excitatory postsynaptic potential / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / PDZ domain binding / regulation of long-term neuronal synaptic plasticity / postsynaptic density membrane / modulation of chemical synaptic transmission / intracellular calcium ion homeostasis / terminal bouton / positive regulation of neuron apoptotic process / presynaptic membrane / neuron apoptotic process / scaffold protein binding / perikaryon / chemical synaptic transmission / negative regulation of neuron apoptotic process / postsynaptic membrane / postsynaptic density / axon / neuronal cell body / ubiquitin protein ligase binding / synapse / dendrite / glutamatergic synapse / 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: 7.6 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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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 482.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 378.3 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 819.1 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 870.5 KB | 表示 | |
XML形式データ | ![]() | 79.4 KB | 表示 | |
CIF形式データ | ![]() | 118.4 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 | ![]() 2685MC ![]() 2680C ![]() 2684C ![]() 2686C ![]() 2687C ![]() 2688C ![]() 2689C ![]() 4uq6C ![]() 4uqjC ![]() 4uqkC 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: 99549.297 Da / 分子数: 4 / 断片: ATD LBD AND PARTIAL TMD, RESIDUES 32-908 / 変異: YES / 由来タイプ: 組換発現 / 詳細: I536V EXCHANGE DUE TO RNA EDITING / 由来: (組換発現) ![]() ![]() 発現宿主: ![]() ![]() 参照: UniProt: P42260 #2: 化合物 | ChemComp-GLU / Has protein modification | Y | 配列の詳細 | LAST 5 RESIDUES ARE GENETICALL | |
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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: GLUK2 / タイプ: COMPLEX |
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緩衝液 | 名称: 150 MM NACL, 20 MM TRIS, 1 MM 2S,4R-4- METHYLGLUTAMATE, 0.75 MM DDM pH: 8 詳細: 150 MM NACL, 20 MM TRIS, 1 MM 2S,4R-4- METHYLGLUTAMATE, 0.75 MM DDM |
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) |
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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: 7.6 Å / 粒子像の数: 21360 詳細: COORDINATES FROM 3KG2 WERE FIT AS SEVEN INDEPENDENT RIGID BODIES CONSISTING OF TWO ATD DIMERS FROM PDB ID 3H6G FOUR LBD MONOMERS FROM PDB 3G3F AND A TMD TETRAMER FROM PDB 3KG2 GEOMETRY AND ...詳細: COORDINATES FROM 3KG2 WERE FIT AS SEVEN INDEPENDENT RIGID BODIES CONSISTING OF TWO ATD DIMERS FROM PDB ID 3H6G FOUR LBD MONOMERS FROM PDB 3G3F AND A TMD TETRAMER FROM PDB 3KG2 GEOMETRY AND STEREOCHEMISTRY OUTLIERS ARE THOSE PRESENT IN PDB 3H6G 3G3F AND 3KG2 USED FOR RIGID BODY FITS SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2685. (DEPOSITION ID: 12610). 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 | ||||||||||||||||||||||||||||
原子モデル構築 |
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精密化 | 最高解像度: 7.6 Å | ||||||||||||||||||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 7.6 Å
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