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基本情報
登録情報 | データベース: PDB / ID: 9ixz | |||||||||||||||||||||
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タイトル | human KCNQ2-CaM-Ebio3 Complex in the Presence of PIP2 | |||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / voltage-gated potassium channel | |||||||||||||||||||||
機能・相同性 | ![]() axon initial segment / Voltage gated Potassium channels / node of Ranvier / CaM pathway / voltage-gated monoatomic cation channel activity / Cam-PDE 1 activation / Interaction between L1 and Ankyrins / Sodium/Calcium exchangers / Calmodulin induced events / ankyrin binding ...axon initial segment / Voltage gated Potassium channels / node of Ranvier / CaM pathway / voltage-gated monoatomic cation channel activity / Cam-PDE 1 activation / Interaction between L1 and Ankyrins / Sodium/Calcium exchangers / Calmodulin induced events / ankyrin binding / 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 / 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) / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / Phase 0 - rapid depolarisation / calcineurin-mediated signaling / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / RHO GTPases activate PAKs / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / regulation of ryanodine-sensitive calcium-release channel activity / action potential / Long-term potentiation / protein phosphatase activator activity / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / DARPP-32 events / catalytic complex / Smooth Muscle Contraction / voltage-gated 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 / cellular response to interferon-beta / Protein methylation / calcium channel inhibitor activity / Activation of AMPK downstream of NMDARs / presynaptic cytosol / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / eNOS activation / titin binding / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / sperm midpiece / regulation of calcium-mediated signaling / voltage-gated potassium channel complex / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / FCERI mediated Ca+2 mobilization / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / FCGR3A-mediated IL10 synthesis / calyx of Held / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / adenylate cyclase activator activity / sarcomere / regulation of cytokinesis / VEGFR2 mediated cell proliferation / protein serine/threonine kinase activator activity / VEGFR2 mediated vascular permeability / spindle microtubule / Translocation of SLC2A4 (GLUT4) to the plasma membrane / calcium channel regulator activity / positive regulation of receptor signaling pathway via JAK-STAT / Stimuli-sensing channels / RAF activation / Transcriptional activation of mitochondrial biogenesis / response to calcium ion / RAS processing / cellular response to type II interferon / G2/M transition of mitotic cell cycle / long-term synaptic potentiation / spindle pole / Signaling by RAF1 mutants / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / calcium-dependent protein binding / Signaling by BRAF and RAF1 fusions / Inactivation, recovery and regulation of the phototransduction cascade / Platelet degranulation 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: 3.2 Å | |||||||||||||||||||||
![]() | Yang, Z. / Guo, J. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Small molecule inhibits KCNQ channels with a non-blocking mechanism. 著者: Junnan Li / Zhenni Yang / Shaoying Zhang / Yangliang Ye / Jiangnan He / Yan Zhang / Huayun Han / Wan Kong / Jiangru Liu / Yu Min / Juwen Shen / Lianghe Mei / Zongsheng Chen / Panpan Hou / ...著者: Junnan Li / Zhenni Yang / Shaoying Zhang / Yangliang Ye / Jiangnan He / Yan Zhang / Huayun Han / Wan Kong / Jiangru Liu / Yu Min / Juwen Shen / Lianghe Mei / Zongsheng Chen / Panpan Hou / Jiangtao Guo / Qiansen Zhang / Huaiyu Yang / ![]() 要旨: Voltage-gated ion channels (VGICs) are crucial targets for neuropsychiatric therapeutics owing to their role in controlling neuronal excitability and the established link between their dysfunction ...Voltage-gated ion channels (VGICs) are crucial targets for neuropsychiatric therapeutics owing to their role in controlling neuronal excitability and the established link between their dysfunction and neurological diseases, highlighting the importance of identifying modulators with distinct mechanisms. Here we report two small-molecule modulators with the same chemical scaffold, Ebio2 and Ebio3, targeting a potassium channel KCNQ2, with opposite effects: Ebio2 acts as a potent activator, whereas Ebio3 serves as a potent and selective inhibitor. Guided by cryogenic electron microscopy, patch-clamp recordings and molecular dynamics simulations, we reveal that Ebio3 attaches to the outside of the inner gate, employing a unique non-blocking inhibitory mechanism that directly squeezes the S6 pore helix to inactivate the KCNQ2 channel. Ebio3 also showed efficacy in inhibiting currents of KCNQ2 pathogenic gain-of-function mutations, presenting an avenue for VGIC-targeted therapies. Overall, these findings contribute to the understanding of KCNQ2 inhibition and provide insights into developing selective, non-blocking VGIC inhibitors. | |||||||||||||||||||||
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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PDBx/mmCIF形式 | ![]() | 768.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
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-検証レポート
文書・要旨 | ![]() | 1.5 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.6 MB | 表示 | |
XML形式データ | ![]() | 65.1 KB | 表示 | |
CIF形式データ | ![]() | 92.9 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 | ![]() 60982MC ![]() 9ixyC 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
#1: タンパク質 | 分子量: 69062.742 Da / 分子数: 4 / 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-A1L3D / ~{ 分子量: 363.402 Da / 分子数: 4 / 由来タイプ: 合成 / 式: C19H23F2N3O2 / タイプ: SUBJECT OF INVESTIGATION 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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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: human KCNQ2-CaM-Ebio3 complex / タイプ: COMPLEX / Entity ID: #1-#2 / 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: 8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 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 / 最大 デフォーカス(公称値): 1600 nm / 最小 デフォーカス(公称値): 800 nm / Cs: 2.7 mm |
撮影 | 電子線照射量: 52 e/Å2 フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 85131 / 対称性のタイプ: POINT |