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基本情報
| 登録情報 | データベース: PDB / ID: 8fpc | ||||||
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| タイトル | Conformation 1 of the ligand binding domain (LBDconf1) of GluA2 flip Q isoform of AMPA receptor in complex with gain-of-function TARP gamma-2, with 10mM CaCl2, 150mM NaCl, 1mM MgCl2, 330uM CTZ, and 100mM glutamate (Open-CaNaMg) | ||||||
要素 | Glutamate receptor 2 | ||||||
キーワード | TRANSPORT PROTEIN / ionotropic glutamate receptors / AMPA receptors / ion channel / ligand-gated ion channel / auxiliary subunit / stargazing / TARP gamma2 | ||||||
| 機能・相同性 | 機能・相同性情報spine synapse / dendritic spine neck / dendritic spine cytoplasm / dendritic spine head / cellular response to amine stimulus / perisynaptic space / Activation of AMPA receptors / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / response to lithium ion ...spine synapse / dendritic spine neck / dendritic spine cytoplasm / dendritic spine head / cellular response to amine stimulus / perisynaptic space / Activation of AMPA receptors / ligand-gated monoatomic cation channel activity / AMPA glutamate receptor activity / response to lithium ion / Trafficking of GluR2-containing AMPA receptors / AMPA glutamate receptor clustering / kainate selective glutamate receptor activity / cellular response to glycine / immunoglobulin binding / AMPA glutamate receptor complex / asymmetric synapse / extracellularly glutamate-gated ion channel activity / conditioned place preference / regulation of receptor recycling / ionotropic glutamate receptor complex / glutamate receptor binding / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission / regulation of synaptic transmission, glutamatergic / response to fungicide / regulation of long-term synaptic depression / cytoskeletal protein binding / glutamate-gated receptor activity / extracellular ligand-gated monoatomic ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / somatodendritic compartment / dendrite membrane / ionotropic glutamate receptor binding / excitatory synapse / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / ionotropic glutamate receptor signaling pathway / dendrite cytoplasm / positive regulation of excitatory postsynaptic potential / synaptic membrane / dendritic shaft / SNARE binding / PDZ domain binding / synaptic transmission, glutamatergic / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / protein tetramerization / establishment of protein localization / cerebral cortex development / postsynaptic density membrane / modulation of chemical synaptic transmission / receptor internalization / Schaffer collateral - CA1 synapse / terminal bouton / synaptic vesicle / synaptic vesicle membrane / long-term synaptic potentiation / signaling receptor activity / presynapse / amyloid-beta binding / growth cone / presynaptic membrane / scaffold protein binding / perikaryon / dendritic spine / chemical synaptic transmission / postsynaptic membrane / neuron projection / postsynaptic density / axon / external side of plasma membrane / neuronal cell body / dendrite / synapse / protein kinase binding / protein-containing complex 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: 2.78 Å | ||||||
データ登録者 | Nakagawa, T. | ||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Nat Struct Mol Biol / 年: 2024タイトル: The open gate of the AMPA receptor forms a Ca binding site critical in regulating ion transport. 著者: Terunaga Nakagawa / Xin-Tong Wang / Federico J Miguez-Cabello / Derek Bowie / ![]() 要旨: Alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionic acid receptors (AMPARs) are cation-selective ion channels that mediate most fast excitatory neurotransmission in the brain. Although their gating ...Alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionic acid receptors (AMPARs) are cation-selective ion channels that mediate most fast excitatory neurotransmission in the brain. Although their gating mechanism has been studied extensively, understanding how cations traverse the pore has remained elusive. Here we investigated putative ion and water densities in the open pore of Ca-permeable AMPARs (rat GRIA2 flip-Q isoform) at 2.3-2.6 Å resolution. We show that the ion permeation pathway attains an extracellular Ca binding site (site-G) when the channel gate moves into the open configuration. Site-G is highly selective for Ca over Na, favoring the movement of Ca into the selectivity filter of the pore. Seizure-related N619K mutation, adjacent to site-G, promotes channel opening but attenuates Ca binding and thus diminishes Ca permeability. Our work identifies the importance of site-G, which coordinates with the Q/R site of the selectivity filter to ensure the preferential transport of Ca through the channel pore. | ||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 8fpc.cif.gz | 261.3 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8fpc.ent.gz | 181.9 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8fpc.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
| その他 | その他のダウンロード |
-検証レポート
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/fp/8fpc ftp://data.pdbj.org/pub/pdb/validation_reports/fp/8fpc | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 29361MC ![]() 8fp4C ![]() 8fp9C ![]() 8fpgC ![]() 8fphC ![]() 8fpkC ![]() 8fplC ![]() 8fpsC ![]() 8fpvC ![]() 8fpyC ![]() 8fpzC ![]() 8fq1C ![]() 8fq2C ![]() 8fq3C ![]() 8fq5C ![]() 8fq6C ![]() 8fq8C ![]() 8fqaC ![]() 8fqbC ![]() 8fqdC ![]() 8fqeC ![]() 8fqfC ![]() 8fqgC ![]() 8fqhC ![]() 8fr0C M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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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: 99559.461 Da / 分子数: 4 / 変異: FLAG epitope tag (DYKDDDDK) insertion / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: P19491#2: 化合物 | ChemComp-GLU / #3: 化合物 | ChemComp-CYZ / #4: 水 | ChemComp-HOH / | 研究の焦点であるリガンドがあるか | Y | 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 flip-Q isoform in complex with TARP gamma2 (K52E, K53E) タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT | ||||||||||||||||||||||||||||||
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| 分子量 | 値: 0.5 MDa / 実験値: NO | ||||||||||||||||||||||||||||||
| 由来(天然) | 生物種: ![]() | ||||||||||||||||||||||||||||||
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: HEK | ||||||||||||||||||||||||||||||
| 緩衝液 | pH: 8 詳細: L-glutamic acid (100 mM) and cyclothiazide (CTZ, 0.33 mM) were added before freezing. The 1 M L-glutamic acid stock solution was adjusted to pH 7.4 using NaOH. | ||||||||||||||||||||||||||||||
| 緩衝液成分 |
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| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||
| 急速凍結 | 凍結剤: 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: TFS KRIOS |
| 電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
| 電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 500 nm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
| 試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
| 撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 / 実像数: 32662 |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||
| 対称性 | 点対称性: C2 (2回回転対称) | ||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 204515 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||
| 拘束条件 |
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万見について






米国, 1件
引用

















































PDBj






gel filtration
Homo sapiens (ヒト)



