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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: 8trj | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of the rat P2X7 receptor in complex with the high-affinity agonist BzATP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | P2X purinoceptor 7 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | MEMBRANE PROTEIN / Ion Channel / Ligand-gate Ion Channel / P2X Receptor / Allosteric Antagonist / High-Affinity Agonist | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
機能・相同性 | ![]() The NLRP3 inflammasome / regulation of presynaptic dense core granule exocytosis / Platelet homeostasis / positive regulation of lymphocyte apoptotic process / positive regulation of bleb assembly / NAD transport / phagolysosome assembly / Elevation of cytosolic Ca2+ levels / phospholipid transfer to membrane / positive regulation of cytoskeleton organization ...The NLRP3 inflammasome / regulation of presynaptic dense core granule exocytosis / Platelet homeostasis / positive regulation of lymphocyte apoptotic process / positive regulation of bleb assembly / NAD transport / phagolysosome assembly / Elevation of cytosolic Ca2+ levels / phospholipid transfer to membrane / positive regulation of cytoskeleton organization / lymphocyte apoptotic process / positive regulation of monoatomic ion transmembrane transport / purinergic nucleotide receptor signaling pathway / gamma-aminobutyric acid secretion / pore complex assembly / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / positive regulation of interleukin-1 alpha production / plasma membrane organization / positive regulation of gamma-aminobutyric acid secretion / bleb / plasma membrane phospholipid scrambling / collagen metabolic process / negative regulation of cell volume / ATP export / T cell apoptotic process / positive regulation of prostaglandin secretion / bleb assembly / response to fluid shear stress / mitochondrial depolarization / vesicle budding from membrane / ceramide biosynthetic process / positive regulation of T cell apoptotic process / programmed cell death / prostaglandin secretion / positive regulation of ossification / cellular response to dsRNA / cell volume homeostasis / positive regulation of glutamate secretion / glutamate secretion / negative regulation of bone resorption / skeletal system morphogenesis / positive regulation of macrophage cytokine production / phospholipid translocation / response to zinc ion / response to ATP / positive regulation of calcium ion transport into cytosol / positive regulation of mitochondrial depolarization / positive regulation of NLRP3 inflammasome complex assembly / T cell homeostasis / : / synaptic vesicle exocytosis / membrane protein ectodomain proteolysis / protein secretion / monoatomic cation transport / membrane depolarization / negative regulation of MAPK cascade / positive regulation of bone mineralization / neuronal action potential / response to electrical stimulus / response to mechanical stimulus / T cell proliferation / regulation of sodium ion transport / extrinsic apoptotic signaling pathway / homeostasis of number of cells within a tissue / release of sequestered calcium ion into cytosol / sensory perception of pain / reactive oxygen species metabolic process / protein serine/threonine kinase activator activity / positive regulation of glycolytic process / positive regulation of interleukin-1 beta production / positive regulation of protein secretion / mitochondrion organization / establishment of localization in cell / response to bacterium / apoptotic signaling pathway / lipopolysaccharide binding / protein catabolic process / terminal bouton / : / T cell mediated cytotoxicity / cell morphogenesis / neuromuscular junction / protein processing / calcium ion transmembrane transport / positive regulation of T cell mediated cytotoxicity / positive regulation of interleukin-6 production / response to calcium ion / calcium ion transport / MAPK cascade / nuclear envelope / cell-cell junction / signaling receptor activity / channel activity / scaffold protein binding / gene expression / response to lipopolysaccharide / cell surface receptor signaling pathway / postsynapse / positive regulation of MAPK cascade 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | Oken, A.C. / Lisi, N.E. / Krishnamurthy, I. / McCarthy, A.E. / Godsey, M.H. / Glasfeld, A. / Mansoor, S.E. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() 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. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 572.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 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 | ![]() 41581MC ![]() 8tr5C ![]() 8v4sC 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 ![]() |
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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
-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) ![]() ![]() ![]() #5: 糖 | ChemComp-NAG / |
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-非ポリマー , 5種, 162分子 






#2: 化合物 | 分子量: 715.393 Da / 分子数: 3 / 由来タイプ: 合成 / 式: C24H24N5O15P3 / タイプ: SUBJECT OF INVESTIGATION #3: 化合物 | #4: 化合物 | ChemComp-ZN / #6: 化合物 | ChemComp-PLM / #7: 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: ![]() |
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: ![]() |
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): 2200 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm |
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: 40 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 7630 |
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: 2.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 500478 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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