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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: 8v4s | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of the rat P2X7 receptor in the apo closed state purified in the absence of sodium | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
要素 | P2X purinoceptor 7 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
キーワード | MEMBRANE PROTEIN / Ion Channel / Ligand-gate Ion Channel / P2X Receptor / Allosteric Antagonist / High-Affinity Agonist | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報Platelet homeostasis / The NLRP3 inflammasome / positive regulation of lymphocyte apoptotic process / regulation of presynaptic dense core granule exocytosis / positive regulation of bleb assembly / NAD transport / Elevation of cytosolic Ca2+ levels / phagolysosome assembly / phospholipid transfer to membrane / positive regulation of cytoskeleton organization ...Platelet homeostasis / The NLRP3 inflammasome / positive regulation of lymphocyte apoptotic process / regulation of presynaptic dense core granule exocytosis / positive regulation of bleb assembly / NAD transport / Elevation of cytosolic Ca2+ levels / phagolysosome assembly / phospholipid transfer to membrane / positive regulation of cytoskeleton organization / positive regulation of monoatomic ion transmembrane transport / purinergic nucleotide receptor signaling pathway / plasma membrane organization / extracellularly ATP-gated monoatomic cation channel activity / positive regulation of gamma-aminobutyric acid secretion / positive regulation of interleukin-1 alpha production / purinergic nucleotide receptor activity / ATP export / collagen metabolic process / pore complex assembly / positive regulation of prostaglandin secretion / negative regulation of cell volume / plasma membrane phospholipid scrambling / bleb assembly / vesicle budding from membrane / positive regulation of T cell apoptotic process / bleb / response to fluid shear stress / programmed cell death / positive regulation of ossification / cell volume homeostasis / cellular response to dsRNA / negative regulation of bone resorption / ceramide biosynthetic process / positive regulation of glutamate secretion / skeletal system morphogenesis / positive regulation of macrophage cytokine production / phospholipid translocation / response to zinc ion / sodium channel activity / protein homotrimerization / response to ATP / positive regulation of NLRP3 inflammasome complex assembly / positive regulation of mitochondrial depolarization / T cell homeostasis / membrane protein ectodomain proteolysis / response to electrical stimulus / positive regulation of calcium ion transport into cytosol / synaptic vesicle exocytosis / membrane depolarization / T cell proliferation / monoatomic cation transport / positive regulation of bone mineralization / potassium channel activity / response to mechanical stimulus / neuronal action potential / regulation of sodium ion transport / extrinsic apoptotic signaling pathway / negative regulation of MAPK cascade / release of sequestered calcium ion into cytosol / reactive oxygen species metabolic process / sensory perception of pain / homeostasis of number of cells within a tissue / establishment of localization in cell / positive regulation of glycolytic process / positive regulation of protein secretion / positive regulation of interleukin-1 beta production / protein serine/threonine kinase activator activity / protein catabolic process / response to bacterium / apoptotic signaling pathway / neuromuscular junction / mitochondrion organization / lipopolysaccharide binding / protein processing / response to calcium ion / positive regulation of interleukin-6 production / positive regulation of T cell mediated cytotoxicity / calcium ion transmembrane transport / cell morphogenesis / terminal bouton / cell-cell junction / calcium ion transport / nuclear envelope / signaling receptor activity / channel activity / scaffold protein binding / response to lipopolysaccharide / gene expression / positive regulation of MAPK cascade / cell surface receptor signaling pathway / postsynapse / defense response to Gram-positive bacterium / positive regulation of apoptotic process / response to xenobiotic stimulus / inflammatory response / copper ion binding / signaling receptor binding / external side of plasma membrane / neuronal cell body 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: 2.49 Å | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
データ登録者 | Oken, A.C. / Lisi, N.E. / Krishnamurthy, I. / McCarthy, A.E. / Godsey, M.H. / Glasfeld, A. / Mansoor, S.E. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: Nat Commun / 年: 2024タイトル: High-affinity agonism at the P2X receptor is mediated by three residues outside the orthosteric pocket. 著者: Adam C Oken / Nicolas E Lisi / Ipsita Krishnamurthy / Alanna E McCarthy / Michael H Godsey / Arthur Glasfeld / Steven E Mansoor / ![]() 要旨: P2X receptors are trimeric ATP-gated ion channels that activate diverse signaling cascades. Due to its role in apoptotic pathways, selective activation of P2X is a potential experimental tool and ...P2X receptors are trimeric ATP-gated ion channels that activate diverse signaling cascades. Due to its role in apoptotic pathways, selective activation of P2X is a potential experimental tool and therapeutic approach in cancer biology. However, mechanisms of high-affinity P2X activation have not been defined. We report high-resolution cryo-EM structures of wild-type rat P2X bound to the high-affinity agonist BzATP as well as significantly improved apo receptor structures in the presence and absence of sodium. Apo structures define molecular details of pore architecture and reveal how a partially hydrated Na ion interacts with the conductance pathway in the closed state. Structural, electrophysiological, and direct binding data of BzATP reveal that three residues just outside the orthosteric ATP-binding site are responsible for its high-affinity agonism. This work provides insights into high-affinity agonism for any P2X receptor and lays the groundwork for development of subtype-specific agonists applicable to cancer therapeutics. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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 | 8v4s.cif.gz | 350.4 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8v4s.ent.gz | 283.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8v4s.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/v4/8v4s ftp://data.pdbj.org/pub/pdb/validation_reports/v4/8v4s | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 42976MC ![]() 8tr5C ![]() 8trjC 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 | 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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| 1 |
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要素
-タンパク質 / 糖 , 2種, 12分子 ABC

| #1: タンパク質 | 分子量: 68472.461 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: Q64663#4: 糖 | ChemComp-NAG / |
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-非ポリマー , 4種, 255分子 






| #2: 化合物 | | #3: 化合物 | ChemComp-ZN / #5: 化合物 | ChemComp-PLM / #6: 水 | ChemComp-HOH / | |
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-詳細
| 研究の焦点であるリガンドがあるか | Y |
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| Has protein modification | Y |
-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: Membrane protein / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 由来(天然) | 生物種: ![]() |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: HEK293 GNTI- |
| 緩衝液 | pH: 7 |
| 試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
| 急速凍結 | 装置: FEI VITROBOT MARK IV / 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: FEI TITAN 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): 1400 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm / C2レンズ絞り径: 70 µm |
| 試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
| 撮影 | 電子線照射量: 45 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 11353 |
| 電子光学装置 | エネルギーフィルタースリット幅: 20 eV |
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解析
| EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
| 対称性 | 点対称性: C3 (3回回転対称) |
| 3次元再構成 | 解像度: 2.49 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 273076 / 対称性のタイプ: POINT |
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万見について






米国, 2件
引用




PDBj





Homo sapiens (ヒト)
FIELD EMISSION GUN