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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: 9ixy | |||||||||||||||||||||
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| タイトル | Human KCNQ2-CaM-Ebio2 Complex in the Presence of PIP2 | |||||||||||||||||||||
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キーワード | MEMBRANE PROTEIN / voltage-gated potassium channel | |||||||||||||||||||||
| 機能・相同性 | 機能・相同性情報transporter inhibitor activity / axon initial segment / : / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / node of Ranvier / Interaction between L1 and Ankyrins / voltage-gated monoatomic cation channel activity / ankyrin binding / negative regulation of high voltage-gated calcium channel activity ...transporter inhibitor activity / axon initial segment / : / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / node of Ranvier / Interaction between L1 and Ankyrins / voltage-gated monoatomic cation channel activity / ankyrin binding / negative regulation of high voltage-gated calcium channel activity / response to corticosterone / regulation of synaptic vesicle exocytosis / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / calcineurin-mediated signaling / nitric-oxide synthase binding / regulation of cell communication by electrical coupling involved in cardiac conduction / adenylate cyclase binding / protein phosphatase activator activity / action potential / voltage-gated potassium channel activity / regulation of synaptic vesicle endocytosis / detection of calcium ion / regulation of cardiac muscle contraction / postsynaptic cytosol / catalytic complex / phosphatidylinositol 3-kinase binding / presynaptic cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / regulation of calcium-mediated signaling / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / voltage-gated potassium channel complex / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / regulation of heart rate / calyx of Held / nitric-oxide synthase regulator activity / adenylate cyclase activator activity / response to amphetamine / regulation of cytokinesis / sarcomere / protein serine/threonine kinase activator activity / spindle microtubule / calcium channel regulator activity / response to calcium ion / G2/M transition of mitotic cell cycle / Schaffer collateral - CA1 synapse / mitochondrial membrane / spindle pole / calcium-dependent protein binding / long-term synaptic potentiation / nervous system development / myelin sheath / synaptic vesicle membrane / growth cone / sperm midpiece / vesicle / chemical synaptic transmission / transmembrane transporter binding / calmodulin binding / G protein-coupled receptor signaling pathway / protein domain specific binding / calcium ion binding / centrosome / synapse / protein kinase binding / protein-containing complex / membrane / nucleus / plasma membrane / cytoplasm 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: 3.1 Å | |||||||||||||||||||||
データ登録者 | Yang, Z. / Guo, J. | |||||||||||||||||||||
| 資金援助 | 中国, 1件
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引用 | ジャーナル: Nat Chem Biol / 年: 2025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. | |||||||||||||||||||||
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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 | 9ixy.cif.gz | 761.1 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9ixy.ent.gz | 表示 | PDB形式 | |
| PDBx/mmJSON形式 | 9ixy.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ix/9ixy ftp://data.pdbj.org/pub/pdb/validation_reports/ix/9ixy | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 60981MC ![]() 9ixzC 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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| 1 |
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要素
| #1: タンパク質 | 分子量: 70880.742 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 / 細胞株 (発現宿主): HEK293 / 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: CALM3, CALML2, CAM3, CAMC, CAMIII / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DP25#3: 化合物 | ChemComp-A1L3C / ~{ 分子量: 335.348 Da / 分子数: 4 / 由来タイプ: 合成 / 式: C17H19F2N3O2 / タイプ: SUBJECT OF INVESTIGATION #4: 化合物 | ChemComp-PIO / [( 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: KCNQ2-Ebio2 / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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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) / 細胞: hek 293 |
| 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: TFS 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): 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: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 74947 / 対称性のタイプ: POINT |
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万見について




Homo sapiens (ヒト)
中国, 1件
引用


PDBj



FIELD EMISSION GUN