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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9rn4 | |||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | GluA4 in complex with TARP-2, desensitized state, structure of TMD/LBD domains | |||||||||||||||||||||||||||||||||||||||||||||
要素 |
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キーワード | MEMBRANE PROTEIN / Gria4 / Voltage-dependent calcium channel gamma-2 / AMPA Receptor / GluA4-TARP2 / Desensitized state / TMD/LBD | |||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / postsynaptic neurotransmitter receptor diffusion trapping / regulation of AMPA receptor activity / Trafficking of AMPA receptors / channel regulator activity / kainate selective glutamate receptor complex / LGI-ADAM interactions ...Presynaptic depolarization and calcium channel opening / eye blink reflex / positive regulation of protein localization to basolateral plasma membrane / cerebellar mossy fiber / postsynaptic neurotransmitter receptor diffusion trapping / regulation of AMPA receptor activity / Trafficking of AMPA receptors / channel regulator activity / kainate selective glutamate receptor complex / LGI-ADAM interactions / regulation of synapse structure or activity / membrane hyperpolarization / nervous system process / Synaptic adhesion-like molecules / protein targeting to membrane / voltage-gated calcium channel complex / neurotransmitter receptor localization to postsynaptic specialization membrane / neuromuscular junction development / Activation of AMPA receptors / AMPA glutamate receptor activity / transmission of nerve impulse / Trafficking of GluR2-containing AMPA receptors / negative regulation of smooth muscle cell apoptotic process / AMPA glutamate receptor complex / ionotropic glutamate receptor complex / membrane depolarization / Unblocking of NMDA receptors, glutamate binding and activation / positive regulation of synaptic transmission, glutamatergic / regulation of postsynaptic membrane neurotransmitter receptor levels / voltage-gated calcium channel activity / response to fungicide / glutamate-gated receptor activity / presynaptic active zone membrane / somatodendritic compartment / ionotropic glutamate receptor binding / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / hippocampal mossy fiber to CA3 synapse / regulation of membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / calcium channel regulator activity / synaptic transmission, glutamatergic / response to calcium ion / postsynaptic density membrane / modulation of chemical synaptic transmission / Schaffer collateral - CA1 synapse / terminal bouton / dendritic spine / chemical synaptic transmission / postsynaptic density / neuronal cell body / synapse / dendrite / glutamatergic synapse / cell surface / identical protein binding / 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: 3.4 Å | |||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Vega-Gutierrez, C. / Herguedas, B. | |||||||||||||||||||||||||||||||||||||||||||||
| 資金援助 | スペイン, 1件
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引用 | ジャーナル: Nat Struct Mol Biol / 年: 2025タイトル: GluA4 AMPA receptor gating mechanisms and modulation by auxiliary proteins. 著者: Carlos Vega-Gutiérrez / Javier Picañol-Párraga / Irene Sánchez-Valls / Victoria Del Pilar Ribón-Fuster / David Soto / Beatriz Herguedas / ![]() 要旨: AMPA-type glutamate receptors, fundamental ion channels for fast excitatory neurotransmission and synaptic plasticity, contain a GluA tetrameric core surrounded by auxiliary proteins such as ...AMPA-type glutamate receptors, fundamental ion channels for fast excitatory neurotransmission and synaptic plasticity, contain a GluA tetrameric core surrounded by auxiliary proteins such as transmembrane AMPA receptor regulatory proteins (TARPs) or Cornichons. Their exact composition and stoichiometry govern functional properties, including kinetics, calcium permeability and trafficking. The GluA1-GluA3 subunits predominate in the adult forebrain and are well characterized. However, we lack structural information on full-length GluA4-containing AMPARs, a subtype that has specific roles in brain development and specific cell types in mammals. Here we present the cryo-electron microscopy structures of rat GluA4:TARP-γ2 trapped in active, resting and desensitized states, covering a full gating cycle. Additionally, we describe the structure of GluA4 alone, which displays a classical Y-shaped conformation. In resting conditions, GluA4:TARP-γ2 adopts two conformations, one resembling the desensitized states of other GluA subunits. Moreover, we identify a regulatory site for TARP-γ2 in the ligand-binding domain that modulates gating kinetics. Our findings uncover distinct features of GluA4, highlighting how subunit composition and auxiliary proteins shape receptor structure and dynamics, expanding glutamatergic signaling diversity. | |||||||||||||||||||||||||||||||||||||||||||||
| 履歴 |
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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 | 9rn4.cif.gz | 451.5 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9rn4.ent.gz | 338.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9rn4.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
| 文書・要旨 | 9rn4_validation.pdf.gz | 1.7 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 9rn4_full_validation.pdf.gz | 1.7 MB | 表示 | |
| XML形式データ | 9rn4_validation.xml.gz | 85.2 KB | 表示 | |
| CIF形式データ | 9rn4_validation.cif.gz | 126.7 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/rn/9rn4 ftp://data.pdbj.org/pub/pdb/validation_reports/rn/9rn4 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 54080MC ![]() 9igzC ![]() 9qdnC ![]() 9qpwC ![]() 9rmsC ![]() 9rmwC ![]() 9rn7C ![]() 9rnhC 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: 98671.938 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: P19493#2: タンパク質 | 分子量: 35950.801 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: Q71RJ2#3: 化合物 | ChemComp-PLM / #4: 化合物 | ChemComp-CA / | #5: 化合物 | ChemComp-OLC / ( 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: GluA4 in complex with TARP-2, Desensitized state, structure of TMD/LBD domain タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT | ||||||||||||||||||||
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| 分子量 | 値: 0.62 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) / プラスミド: pBICMam | ||||||||||||||||||||
| 緩衝液 | pH: 8 | ||||||||||||||||||||
| 緩衝液成分 |
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| 試料 | 濃度: 3.1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: The sample was incubated with L-Glutamate to capture the receptor in its desensitized state | ||||||||||||||||||||
| 試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
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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: OTHER |
| 電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 800 nm |
| 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 BIOCONTINUUM (6k x 4k) 実像数: 12910 |
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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 | ||||||||||||||||
| 3次元再構成 | 解像度: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 39760 / 対称性のタイプ: POINT | ||||||||||||||||
| 原子モデル構築 | プロトコル: RIGID BODY FIT 詳細: I performed fitting using Chimera for the TMD domain (previously modeled and individually deposited in the PDB) and PDB entry 3TKD was fitted into chains A-D. B-factors were reset, GluA4 ...詳細: I performed fitting using Chimera for the TMD domain (previously modeled and individually deposited in the PDB) and PDB entry 3TKD was fitted into chains A-D. B-factors were reset, GluA4 residues were substituted, water molecules were removed. Subsequently, rigid-body refinement was performed using Phenix. | ||||||||||||||||
| 原子モデル構築 | PDB-ID: 3TKD Accession code: 3TKD / Source name: PDB / タイプ: experimental model |
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Homo sapiens (ヒト)



FIELD EMISSION GUN
