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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: 8j00 | |||||||||||||||
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| タイトル | Human KCNQ2-CaM in complex with CBD | |||||||||||||||
要素 |
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キーワード | MEMBRANE PROTEIN / potassium voltage-gated channel / CBD | |||||||||||||||
| 機能・相同性 | 機能・相同性情報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 / ankyrin binding / Calmodulin induced events ...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 / ankyrin binding / 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 / 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 / action potential / regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / Long-term potentiation / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / DARPP-32 events / voltage-gated potassium channel activity / catalytic complex / Smooth Muscle Contraction / 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 / FCERI mediated Ca+2 mobilization / substantia nigra development / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / FCGR3A-mediated IL10 synthesis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / calyx of Held / adenylate cyclase activator activity / sarcomere / VEGFR2 mediated cell proliferation / protein serine/threonine kinase activator activity / VEGFR2 mediated vascular permeability / regulation of cytokinesis / spindle microtubule / calcium channel regulator activity / positive regulation of receptor signaling pathway via JAK-STAT / Translocation of SLC2A4 (GLUT4) to the plasma membrane / RAF activation / Transcriptional activation of mitochondrial biogenesis / response to calcium ion / cellular response to type II interferon / Stimuli-sensing channels / G2/M transition of mitotic cell cycle / long-term synaptic potentiation / spindle pole / RAS processing / Signaling by RAF1 mutants / calcium-dependent protein binding / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / 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 | Homo sapiens (ヒト) | |||||||||||||||
| 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 Å | |||||||||||||||
データ登録者 | Ma, D. / Li, X. / Guo, J. | |||||||||||||||
| 資金援助 | 中国, 4件
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引用 | ジャーナル: Nat Commun / 年: 2023タイトル: Ligand activation mechanisms of human KCNQ2 channel. 著者: Demin Ma / Yueming Zheng / Xiaoxiao Li / Xiaoyu Zhou / Zhenni Yang / Yan Zhang / Long Wang / Wenbo Zhang / Jiajia Fang / Guohua Zhao / Panpan Hou / Fajun Nan / Wei Yang / Nannan Su / Zhaobing ...著者: Demin Ma / Yueming Zheng / Xiaoxiao Li / Xiaoyu Zhou / Zhenni Yang / Yan Zhang / Long Wang / Wenbo Zhang / Jiajia Fang / Guohua Zhao / Panpan Hou / Fajun Nan / Wei Yang / Nannan Su / Zhaobing Gao / Jiangtao Guo / ![]() 要旨: The human voltage-gated potassium channel KCNQ2/KCNQ3 carries the neuronal M-current, which helps to stabilize the membrane potential. KCNQ2 can be activated by analgesics and antiepileptic drugs but ...The human voltage-gated potassium channel KCNQ2/KCNQ3 carries the neuronal M-current, which helps to stabilize the membrane potential. KCNQ2 can be activated by analgesics and antiepileptic drugs but their activation mechanisms remain unclear. Here we report cryo-electron microscopy (cryo-EM) structures of human KCNQ2-CaM in complex with three activators, namely the antiepileptic drug cannabidiol (CBD), the lipid phosphatidylinositol 4,5-bisphosphate (PIP), and HN37 (pynegabine), an antiepileptic drug in the clinical trial, in an either closed or open conformation. The activator-bound structures, along with electrophysiology analyses, reveal the binding modes of two CBD, one PIP, and two HN37 molecules in each KCNQ2 subunit, and elucidate their activation mechanisms on the KCNQ2 channel. These structures may guide the development of antiepileptic drugs and analgesics that target KCNQ2. | |||||||||||||||
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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 | 8j00.cif.gz | 642.3 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb8j00.ent.gz | 531.4 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8j00.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
| 文書・要旨 | 8j00_validation.pdf.gz | 1.6 MB | 表示 | wwPDB検証レポート |
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| 文書・詳細版 | 8j00_full_validation.pdf.gz | 1.6 MB | 表示 | |
| XML形式データ | 8j00_validation.xml.gz | 58.2 KB | 表示 | |
| CIF形式データ | 8j00_validation.cif.gz | 84.5 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/j0/8j00 ftp://data.pdbj.org/pub/pdb/validation_reports/j0/8j00 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 35879MC ![]() 8izyC ![]() 8j01C ![]() 8j02C ![]() 8j03C ![]() 8j04C ![]() 8j05C ![]() 8w4uC 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 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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要素
| #1: タンパク質 | 分子量: 73627.812 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: KCNQ2 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O43526#2: タンパク質 | 分子量: 19615.445 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: CALM1, CALM, CAM, CAM1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DP23#3: 化合物 | ChemComp-P0T / 研究の焦点であるリガンドがあるか | 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 | 名称: human KCNQ2-CaM in complex with CBD / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: MULTIPLE SOURCES |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 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: 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 / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 800 nm |
| 撮影 | 電子線照射量: 52 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (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 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 99018 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
中国, 4件
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FIELD EMISSION GUN