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基本情報
登録情報 | データベース: PDB / ID: 4uqk | ||||||
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タイトル | Electron density map of GluA2em in complex with quisqualate and LY451646 | ||||||
![]() | GLUTAMATE RECEPTOR 2 | ||||||
![]() | TRANSPORT PROTEIN / GLUA2EM RESTORED ACTIVE 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 | 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: 16.4 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
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 421.4 KB | 表示 | ![]() |
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PDB形式 | ![]() | 324.1 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 2689MC ![]() 2680C ![]() 2684C ![]() 2685C ![]() 2686C ![]() 2687C ![]() 2688C ![]() 4uq6C ![]() 4uqjC ![]() 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: 93105.156 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-QUS / ( Has protein modification | Y | 配列の詳細 | SEQUENCE IS FROM PDB 3KG2 TRUNCATED TO THAT USED TO FIT EM MAPS | |
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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: GLU A2 ATD AND GLUA2 LBD / 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: 1303 |
放射波長 | 相対比: 1 |
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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: 16.4 Å / 粒子像の数: 4795 詳細: FOUR ASSEMBLIES CONSISTING OF TWO ATD DIMERS FROM PDB 3KG2 AND TWO LBD DIMERS FROM PDB 1MM7 WERE FIT AS INDEPENDENT RIGID BODIES TO EM MAPS GEOMETRY AND STEREOCHEMISTRY OUTLIERS ARE THOSE ...詳細: FOUR ASSEMBLIES CONSISTING OF TWO ATD DIMERS FROM PDB 3KG2 AND TWO LBD DIMERS FROM PDB 1MM7 WERE FIT AS INDEPENDENT RIGID BODIES TO EM MAPS GEOMETRY AND STEREOCHEMISTRY OUTLIERS ARE THOSE PRESENT IN THE PDB ENTRIES USED FOR RIGID BODY FITTING SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2689. (DEPOSITION ID: 12609). 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--RIGID BODY | ||||||||||||
原子モデル構築 | PDB-ID: 1MM7 Accession code: 1MM7 / Source name: PDB / タイプ: experimental model | ||||||||||||
精密化 | 最高解像度: 16.4 Å | ||||||||||||
精密化ステップ | サイクル: LAST / 最高解像度: 16.4 Å
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