+データを開く
-基本情報
登録情報 | データベース: EMDB / ID: EMD-2688 | |||||||||
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タイトル | Density map of GluA2em desensitized state in complex with quisqualate (class 3) | |||||||||
マップデータ | Reconstruction of GluA2em desensitized state (class 3) | |||||||||
試料 |
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キーワード | Membrane Protein / Ion Channel / Glutamate Receptor | |||||||||
機能・相同性 | 機能・相同性情報 spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / extracellularly glutamate-gated ion channel activity ...spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / extracellularly glutamate-gated ion channel activity / immunoglobulin binding / AMPA glutamate receptor complex / kainate selective glutamate receptor activity / ionotropic glutamate receptor complex / cellular response to glycine / asymmetric synapse / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / glutamate receptor binding / positive regulation of synaptic transmission / extracellular ligand-gated monoatomic ion channel activity / glutamate-gated receptor activity / response to fungicide / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / regulation of synaptic transmission, glutamatergic / ionotropic glutamate receptor binding / somatodendritic compartment / dendrite membrane / cellular response to brain-derived neurotrophic factor stimulus / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / cytoskeletal protein binding / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / SNARE binding / dendritic shaft / synaptic transmission, glutamatergic / synaptic membrane / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / PDZ domain binding / protein tetramerization / postsynaptic density membrane / establishment of protein localization / modulation of chemical synaptic transmission / Schaffer collateral - CA1 synapse / terminal bouton / receptor internalization / cerebral cortex development / synaptic vesicle membrane / synaptic vesicle / presynapse / signaling receptor activity / presynaptic membrane / amyloid-beta binding / growth cone / scaffold protein binding / chemical synaptic transmission / perikaryon / postsynaptic membrane / dendritic spine / postsynaptic density / neuron projection / axon / neuronal cell body / glutamatergic synapse / dendrite / synapse / protein-containing complex binding / protein kinase binding / cell surface / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | Rattus norvegicus (ドブネズミ) / synthetic construct (人工物) | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 22.9 Å | |||||||||
データ登録者 | Meyerson JR / Kumar J / Chittori S / Rao P / Pierson J / Bartesaghi A / Mayer ML / Subramaniam S | |||||||||
引用 | ジャーナル: Nature / 年: 2014 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. | |||||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | EMマップ: SurfViewMolmilJmol/JSmol |
添付画像 |
-ダウンロードとリンク
-EMDBアーカイブ
マップデータ | emd_2688.map.gz | 4 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-2688-v30.xml emd-2688.xml | 9.5 KB 9.5 KB | 表示 表示 | EMDBヘッダ |
画像 | EMD-2688-GluA2-Quis-class3.jpg | 21.8 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-2688 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-2688 | HTTPS FTP |
-検証レポート
文書・要旨 | emd_2688_validation.pdf.gz | 188.5 KB | 表示 | EMDB検証レポート |
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文書・詳細版 | emd_2688_full_validation.pdf.gz | 187.6 KB | 表示 | |
XML形式データ | emd_2688_validation.xml.gz | 6 KB | 表示 | |
アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2688 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2688 | HTTPS FTP |
-関連構造データ
-リンク
EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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「今月の分子」の関連する項目 |
-マップ
ファイル | ダウンロード / ファイル: emd_2688.map.gz / 形式: CCP4 / 大きさ: 29.8 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Reconstruction of GluA2em desensitized state (class 3) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.406 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
-試料の構成要素
-全体 : GluA2em with quisqualate ligand
全体 | 名称: GluA2em with quisqualate ligand |
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要素 |
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-超分子 #1000: GluA2em with quisqualate ligand
超分子 | 名称: GluA2em with quisqualate ligand / タイプ: sample / ID: 1000 / Number unique components: 2 |
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分子量 | 実験値: 370 KDa / 理論値: 370 KDa |
-分子 #1: GluA2
分子 | 名称: GluA2 / タイプ: protein_or_peptide / ID: 1 / 集合状態: Tetramer / 組換発現: Yes |
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由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) / 別称: Rat |
分子量 | 実験値: 370 KDa / 理論値: 370 KDa |
組換発現 | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) 組換細胞: Sf9 / 組換プラスミド: pFastBac1 |
配列 | UniProtKB: Glutamate receptor 2 |
-分子 #2: quisqualate
分子 | 名称: quisqualate / タイプ: ligand / ID: 2 / 組換発現: No |
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由来(天然) | 生物種: synthetic construct (人工物) |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
試料の集合状態 | particle |
-試料調製
濃度 | 1.8 mg/mL |
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緩衝液 | pH: 8 詳細: 150 mM NaCl, 20 mM Tris pH 8.0, 0.75 mM DDM, 0.12 mM CHS, 1 mM quisqualic acid |
グリッド | 詳細: Vitrified specimens were prepared by adding 2.5 uL of liganded protein at 1.8 mg/ml to R2/2 holey carbon grids (Quantifoil, Jena, Germany) rendered hydrophilic by chemical treatment to enable ...詳細: Vitrified specimens were prepared by adding 2.5 uL of liganded protein at 1.8 mg/ml to R2/2 holey carbon grids (Quantifoil, Jena, Germany) rendered hydrophilic by chemical treatment to enable particle distribution into the holes (Meyerson JR, Rao P, Kumar K, Chittori S, Banerjee S, Pierson J, Mayer ML, and Subramaniam S, manuscript in preparation). |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 120 K / 装置: FEI VITROBOT MARK IV / 手法: Blot for 2 seconds before plunging |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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日付 | 2013年8月1日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 実像数: 888 / 平均電子線量: 25 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
電子光学系 | 倍率(補正後): 47000 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3.5 µm / 最小 デフォーカス(公称値): 2.0 µm / 倍率(公称値): 47000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
-画像解析
詳細 | The particles were selected interactively at the computer terminal. |
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CTF補正 | 詳細: Each particle |
最終 再構成 | 想定した対称性 - 点群: C2 (2回回転対称) / 解像度のタイプ: BY AUTHOR / 解像度: 22.9 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: Relion / 使用した粒子像数: 5999 |