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基本情報
登録情報 | データベース: EMDB / ID: EMD-2684 | |||||||||
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タイトル | Density map of GluA2em in complex with LY451646 and glutamate | |||||||||
![]() | Reconstruction of GluA2em activated state | |||||||||
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![]() | GluA2em activated state | |||||||||
機能・相同性 | ![]() 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 / immunoglobulin binding ...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 / immunoglobulin binding / AMPA glutamate receptor complex / kainate selective glutamate receptor activity / ionotropic glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / asymmetric synapse / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / glutamate receptor binding / glutamate-gated receptor activity / regulation of synaptic transmission, glutamatergic / response to fungicide / cytoskeletal protein binding / ionotropic glutamate receptor binding / presynaptic active zone membrane / extracellular ligand-gated monoatomic ion channel activity / somatodendritic compartment / glutamate-gated calcium ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / dendrite membrane / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / SNARE binding / dendritic shaft / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / PDZ domain binding / protein tetramerization / establishment of protein localization / synaptic membrane / modulation of chemical synaptic transmission / postsynaptic density membrane / terminal bouton / Schaffer collateral - CA1 synapse / cerebral cortex development / receptor internalization / 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 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 12.8 Å | |||||||||
![]() | Meyerson JR / Kumar J / Chittori S / Rao P / Pierson J / Bartesaghi A / Mayer ML / 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. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 4.4 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 11.3 KB 11.3 KB | 表示 表示 | ![]() |
画像 | ![]() | 29 KB | ||
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 | ![]() 4uq6MC ![]() 2680C ![]() 2685C ![]() 2686C ![]() 2687C ![]() 2688C ![]() 2689C ![]() 4uqjC ![]() 4uqkC ![]() 4uqqC M: このマップから作成された原子モデル C: 同じ文献を引用 ( |
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類似構造データ |
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Reconstruction of GluA2em activated state | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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
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試料の構成要素
-全体 : GluA2em with LY451646 and glutamate
全体 | 名称: GluA2em with LY451646 and glutamate |
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要素 |
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-超分子 #1000: GluA2em with LY451646 and glutamate
超分子 | 名称: GluA2em with LY451646 and glutamate / 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 / Name.synonym: GluR2 / 集合状態: Tetramer / 組換発現: Yes |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 実験値: 370 KDa / 理論値: 370 KDa |
組換発現 | 生物種: ![]() ![]() 組換細胞: Sf9 / 組換プラスミド: pFastBac1 |
配列 | UniProtKB: Glutamate receptor 2 |
-分子 #2: glutamate
分子 | 名称: glutamate / 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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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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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, 0.5 mM LY451646, 100 mM NaGlutamate |
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 Timed resolved state: Protein incubated with LY451646 for 30 minutes prior to addition of glutamate, with 15 seconds elapsing before vitrification 手法: Blot for 2 seconds before plunging |
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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: 1566 / 平均電子線量: 25 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
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 |
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画像解析
詳細 | 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: 12.8 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: 16050 |
-原子モデル構築 1
初期モデル | PDB ID: Chain - #0 - Chain ID: A / Chain - #1 - Chain ID: B |
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ソフトウェア | 名称: ![]() |
詳細 | Two copies of a 3KG2 ATD dimer assembly were fit to the EM map |
精密化 | 空間: REAL / プロトコル: RIGID BODY FIT |
得られたモデル | ![]() PDB-4uq6: |