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基本情報
登録情報 | データベース: PDB / ID: 9o5o | |||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of the human SK2-4 chimera/calmodulin channel complex bound to a small molecule activator | |||||||||||||||||||||||||||
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![]() | TRANSPORT PROTEIN / Ion channel / Potassium / Activator / Calmodulin | |||||||||||||||||||||||||||
機能・相同性 | ![]() intermediate conductance calcium-activated potassium channel activity / saliva secretion / small conductance calcium-activated potassium channel activity / Acetylcholine inhibits contraction of outer hair cells / membrane repolarization during atrial cardiac muscle cell action potential / stabilization of membrane potential / Ca2+ activated K+ channels / macropinocytosis / calcium-activated potassium channel activity / regulation of calcium ion import across plasma membrane ...intermediate conductance calcium-activated potassium channel activity / saliva secretion / small conductance calcium-activated potassium channel activity / Acetylcholine inhibits contraction of outer hair cells / membrane repolarization during atrial cardiac muscle cell action potential / stabilization of membrane potential / Ca2+ activated K+ channels / macropinocytosis / calcium-activated potassium channel activity / regulation of calcium ion import across plasma membrane / positive regulation of potassium ion transmembrane transport / inward rectifier potassium channel activity / cell volume homeostasis / regulation of potassium ion transmembrane transport / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / phospholipid translocation / CREB1 phosphorylation through the activation of Adenylate Cyclase / CaMK IV-mediated phosphorylation of CREB / PKA activation / negative regulation of high voltage-gated calcium channel activity / Glycogen breakdown (glycogenolysis) / positive regulation of ryanodine-sensitive calcium-release channel activity / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / negative regulation of calcium ion export across plasma membrane / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / presynaptic endocytosis / regulation of cardiac muscle cell action potential / negative regulation of ryanodine-sensitive calcium-release channel activity / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / positive regulation of T cell receptor signaling pathway / Phase 0 - rapid depolarisation / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / alpha-actinin binding / RHO GTPases activate PAKs / calcineurin-mediated signaling / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / regulation of ryanodine-sensitive calcium-release channel activity / Long-term potentiation / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / protein phosphatase activator activity / DARPP-32 events / Smooth Muscle Contraction / immune system process / catalytic complex / potassium channel activity / detection of calcium ion / regulation of cardiac muscle contraction / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / calcium channel inhibitor activity / cellular response to interferon-beta / Protein methylation / Activation of AMPK downstream of NMDARs / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / eNOS activation / regulation of calcium-mediated signaling / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / titin binding / voltage-gated potassium channel complex / potassium ion transmembrane transport / sperm midpiece / substantia nigra development / calcium channel complex / calyx of Held / FCERI mediated Ca+2 mobilization / Ras activation upon Ca2+ influx through NMDA receptor / FCGR3A-mediated IL10 synthesis / adenylate cyclase activator activity / regulation of heart rate / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / protein serine/threonine kinase activator activity / VEGFR2 mediated cell proliferation / sarcomere / regulation of cytokinesis / VEGFR2 mediated vascular permeability / positive regulation of protein secretion / Translocation of SLC2A4 (GLUT4) to the plasma membrane / positive regulation of receptor signaling pathway via JAK-STAT / spindle microtubule / establishment of localization in cell / RAF activation / Transcriptional activation of mitochondrial biogenesis / defense response / potassium ion transport 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: 3.1 Å | |||||||||||||||||||||||||||
![]() | Cassell, S.J. / Khoshouei, M. / Wilhelm, W.A. / Whicher, J.R. | |||||||||||||||||||||||||||
資金援助 | 1件
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![]() | ![]() タイトル: Mechanism of SK2 channel gating and its modulation by the bee toxin apamin and small molecules 著者: Cassell, S.J. / Li, W. / Krautwald, S. / Khoshouei, M. / Lee, Y.T. / Hou, J. / Guan, W. / Peukert, S. / Wilhelm, W.A. / Whicher, J.R. | |||||||||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 68.8 KB | 表示 | |
CIF形式データ | ![]() | 101.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 70145MC ![]() 9o48C ![]() 9o51C ![]() 9o52C ![]() 9o53C 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 ![]() |
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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: 49382.164 Da / 分子数: 4 断片: SK4 residues 1-15 + SK2 residues 124-412 + SK4 residues 306-428 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #2: タンパク質 | 分子量: 16852.545 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #3: 化合物 | ChemComp-A1B8G / 分子量: 307.227 Da / 分子数: 4 / 由来タイプ: 合成 / 式: C14H8F3N3O2 / タイプ: SUBJECT OF INVESTIGATION #4: 化合物 | #5: 化合物 | ChemComp-CA / 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 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 8 詳細: 20 mM Tris pH 8, 150 mM KCl, 2 mM CaCl2, 0.005% GDN, 0.0005% CHS | ||||||||||||||||||||||||
試料 | 濃度: 7.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: Activator added at 500 uM final concentration | ||||||||||||||||||||||||
試料支持 | 詳細: UltrAuFoil R 1.2/1.3 300 mesh grids were glow-discharged for 30 seconds at 0.5 mBar with 15 mA using easiGlow system 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: UltrAuFoil 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: 298 K 詳細: 5 uL of sample was applied to grids at 4 degree temperature with 100% humidity. After 30 seconds, grids were blotted for 5 seconds with blot force 25 and plunged into liquid ethane. |
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電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS |
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電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 120000 X / 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 / Cs: 2.7 mm / C2レンズ絞り径: 50 µm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 28 sec. / 電子線照射量: 35 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 実像数: 3495 |
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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 | ||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1600000 | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C4 (4回回転対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 346529 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | 空間: REAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 9O48 Accession code: 9O48 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||||||
精密化 | 最高解像度: 3.1 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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