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基本情報
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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 | |||||||||
![]() | Locally sharpened map for APO rP2X7 purified in KCl | |||||||||
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![]() | 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 / positive regulation of monoatomic ion transmembrane transport / lymphocyte apoptotic process / 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 / positive regulation of prostaglandin secretion / T cell apoptotic process / bleb assembly / response to fluid shear stress / vesicle budding from membrane / mitochondrial depolarization / 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 / glutamate secretion / positive regulation of glutamate secretion / negative regulation of bone resorption / positive regulation of macrophage cytokine production / skeletal system morphogenesis / phospholipid translocation / response to zinc ion / response to ATP / positive regulation of mitochondrial depolarization / sodium channel activity / positive regulation of NLRP3 inflammasome complex assembly / protein homotrimerization / T cell homeostasis / positive regulation of calcium ion transport into cytosol / membrane protein ectodomain proteolysis / synaptic vesicle exocytosis / protein secretion / monoatomic cation transport / membrane depolarization / response to electrical stimulus / potassium channel activity / response to mechanical stimulus / positive regulation of bone mineralization / T cell proliferation / neuronal action potential / regulation of sodium ion transport / negative regulation of MAPK cascade / extrinsic apoptotic signaling pathway / release of sequestered calcium ion into cytosol / sensory perception of pain / homeostasis of number of cells within a tissue / reactive oxygen species metabolic process / positive regulation of glycolytic process / protein serine/threonine kinase activator activity / positive regulation of interleukin-1 beta production / positive regulation of protein secretion / mitochondrion organization / response to bacterium / neuromuscular junction / lipopolysaccharide binding / apoptotic signaling pathway / establishment of localization in cell / protein catabolic process / response to calcium ion / T cell mediated cytotoxicity / calcium ion transmembrane transport / protein processing / positive regulation of T cell mediated cytotoxicity / positive regulation of interleukin-6 production / terminal bouton / cell morphogenesis / calcium ion transport / cell-cell junction / nuclear envelope / MAPK cascade / signaling receptor activity / channel activity / scaffold protein binding / response to lipopolysaccharide / gene expression / cell surface receptor signaling pathway / postsynapse 類似検索 - 分子機能 | |||||||||
生物種 | ![]() ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.49 Å | |||||||||
![]() | Oken AC / Lisi NE / Krishnamurthy I / McCarthy AE / Godsey MH / Glasfeld A / Mansoor SE | |||||||||
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. | |||||||||
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FSC (解像度算出) | ![]() | 15.9 KB | 表示 | ![]() |
画像 | ![]() | 130.3 KB | ||
マスクデータ | ![]() | 824 MB | ![]() | |
Filedesc metadata | ![]() | 7.4 KB | ||
その他 | ![]() ![]() ![]() ![]() | 401.7 MB 205.3 MB 395.4 MB 395.4 MB | ||
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-検証レポート
文書・要旨 | ![]() | 678.5 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 678 KB | 表示 | |
XML形式データ | ![]() | 28 KB | 表示 | |
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-関連構造データ
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リンク
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マップ
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注釈 | Locally sharpened map for APO rP2X7 purified in KCl | ||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 0.648 Å | ||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-マスク #1
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投影像・断面図 |
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密度ヒストグラム |
-追加マップ: Sharpened map for APO rP2X7 purified in KCl
ファイル | emd_42976_additional_1.map | ||||||||||||
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注釈 | Sharpened map for APO rP2X7 purified in KCl | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-追加マップ: Unsharpened map for APO rP2X7 purified in KCl
ファイル | emd_42976_additional_2.map | ||||||||||||
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注釈 | Unsharpened map for APO rP2X7 purified in KCl | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: Half map A for APO rP2X7 purified in KCl
ファイル | emd_42976_half_map_1.map | ||||||||||||
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注釈 | Half map A for APO rP2X7 purified in KCl | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
-ハーフマップ: Half map B for APO rP2X7 purified in KCl
ファイル | emd_42976_half_map_2.map | ||||||||||||
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注釈 | Half map B for APO rP2X7 purified in KCl | ||||||||||||
投影像・断面図 |
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密度ヒストグラム |
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試料の構成要素
-全体 : Membrane protein
全体 | 名称: Membrane protein |
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要素 |
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-超分子 #1: Membrane protein
超分子 | 名称: Membrane protein / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 |
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由来(天然) | 生物種: ![]() ![]() |
-分子 #1: P2X purinoceptor 7
分子 | 名称: P2X purinoceptor 7 / タイプ: protein_or_peptide / ID: 1 / コピー数: 3 / 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 68.472461 KDa |
組換発現 | 生物種: ![]() |
配列 | 文字列: MPACCSWNDV FQYETNKVTR IQSVNYGTIK WILHMTVFSY VSFALMSDKL YQRKEPLISS VHTKVKGVAE VTENVTEGGV TKLVHGIFD TADYTLPLQG NSFFVMTNYL KSEGQEQKLC PEYPSRGKQC HSDQGCIKGW MDPQSKGIQT GRCIPYDQKR K TCEIFAWC ...文字列: MPACCSWNDV FQYETNKVTR IQSVNYGTIK WILHMTVFSY VSFALMSDKL YQRKEPLISS VHTKVKGVAE VTENVTEGGV TKLVHGIFD TADYTLPLQG NSFFVMTNYL KSEGQEQKLC PEYPSRGKQC HSDQGCIKGW MDPQSKGIQT GRCIPYDQKR K TCEIFAWC PAEEGKEAPR PALLRSAENF TVLIKNNIDF PGHNYTTRNI LPGMNISCTF HKTWNPQCPI FRLGDIFQEI GE NFTEVAV QGGIMGIEIY WDCNLDSWSH RCQPKYSFRR LDDKYTNESL FPGYNFRYAK YYKENGMEKR TLIKAFGVRF DIL VFGTGG KFDIIQLVVY IGSTLSYFGL ATVCIDLIIN TYASTCCRSR VYPSCKCCEP CAVNEYYYRK KCEPIVEPKP TLKY VSFVD EPHIWMVDQQ LLGKSLQDVK GQEVPRPQTD FLELSRLSLS LHHSPPIPGQ PEEMQLLQIE AVPRSRDSPD WCQCG NCLP SQLPENRRAL EELCCRRKPG QCITTSELFS KIVLSREALQ LLLLYQEPLL ALEGEAINSK LRHCAYRSYA TWRFVS QDM ADFAILPSCC RWKIRKEFPK TQGQYSGFKY PY UniProtKB: P2X purinoceptor 7 |
-分子 #2: GUANOSINE-5'-DIPHOSPHATE
分子 | 名称: GUANOSINE-5'-DIPHOSPHATE / タイプ: ligand / ID: 2 / コピー数: 3 / 式: GDP |
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分子量 | 理論値: 443.201 Da |
Chemical component information | ![]() ChemComp-GDP: |
-分子 #3: ZINC ION
分子 | 名称: ZINC ION / タイプ: ligand / ID: 3 / コピー数: 6 / 式: ZN |
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分子量 | 理論値: 65.409 Da |
-分子 #4: 2-acetamido-2-deoxy-beta-D-glucopyranose
分子 | 名称: 2-acetamido-2-deoxy-beta-D-glucopyranose / タイプ: ligand / ID: 4 / コピー数: 9 / 式: NAG |
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分子量 | 理論値: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-分子 #5: PALMITIC ACID
分子 | 名称: PALMITIC ACID / タイプ: ligand / ID: 5 / コピー数: 15 / 式: PLM |
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由来(天然) | 生物種: ![]() ![]() |
分子量 | 理論値: 256.424 Da |
Chemical component information | ![]() ChemComp-PLM: |
-分子 #6: water
分子 | 名称: water / タイプ: ligand / ID: 6 / コピー数: 231 / 式: HOH |
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分子量 | 理論値: 18.015 Da |
Chemical component information | ![]() ChemComp-HOH: |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
緩衝液 | pH: 7 |
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凍結 | 凍結剤: ETHANE / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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特殊光学系 | エネルギーフィルター - スリット幅: 20 eV |
撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 11353 / 平均電子線量: 45.0 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | C2レンズ絞り径: 70.0 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.7 mm 最大 デフォーカス(公称値): 1.4000000000000001 µm 最小 デフォーカス(公称値): 0.8 µm / 倍率(公称値): 130000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |