+
データを開く
-
基本情報
| 登録情報 | データベース: PDB / ID: 8ijk | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| タイトル | human KCNQ2-CaM-Ebio1 complex in the presence of PIP2 | |||||||||
要素 |
| |||||||||
キーワード | MEMBRANE PROTEIN / Potassium voltage-gated channel subfamily KQT member 2 / Ebio1 | |||||||||
| 機能・相同性 | 機能・相同性情報axon initial segment / Voltage gated Potassium channels / node of Ranvier / Interaction between L1 and Ankyrins / CaM pathway / Cam-PDE 1 activation / voltage-gated monoatomic cation channel activity / ankyrin binding / Sodium/Calcium exchangers / Calmodulin induced events ...axon initial segment / Voltage gated Potassium channels / node of Ranvier / Interaction between L1 and Ankyrins / CaM pathway / Cam-PDE 1 activation / voltage-gated monoatomic cation channel activity / ankyrin binding / 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 / CREB1 phosphorylation through the activation of Adenylate Cyclase / negative regulation of high voltage-gated calcium channel activity / PKA activation / CaMK IV-mediated phosphorylation of CREB / 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 ryanodine-sensitive calcium-release channel activity / regulation of cardiac muscle cell action potential / presynaptic endocytosis / Synthesis of IP3 and IP4 in the cytosol / Phase 0 - rapid depolarisation / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / RHO GTPases activate PAKs / calcineurin-mediated signaling / regulation of cell communication by electrical coupling involved in cardiac conduction / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / protein phosphatase activator activity / action potential / Long-term potentiation / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / DARPP-32 events / Smooth Muscle Contraction / voltage-gated potassium channel activity / detection of calcium ion / regulation of cardiac muscle contraction / catalytic complex / RHO GTPases activate IQGAPs / calcium channel inhibitor activity / presynaptic cytosol / cellular response to interferon-beta / Activation of AMPK downstream of NMDARs / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Protein methylation / eNOS activation / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / 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 / FCERI mediated Ca+2 mobilization / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / FCGR3A-mediated IL10 synthesis / regulation of heart rate / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / Ras activation upon Ca2+ influx through NMDA receptor / calyx of Held / adenylate cyclase activator activity / VEGFR2 mediated cell proliferation / regulation of cytokinesis / VEGFR2 mediated vascular permeability / sarcomere / protein serine/threonine kinase activator activity / spindle microtubule / positive regulation of receptor signaling pathway via JAK-STAT / Translocation of SLC2A4 (GLUT4) to the plasma membrane / calcium channel regulator activity / Transcriptional activation of mitochondrial biogenesis / RAF activation / response to calcium ion / cellular response to type II interferon / G2/M transition of mitotic cell cycle / Stimuli-sensing channels / spindle pole / Signaling by RAF1 mutants / calcium-dependent protein binding / RAS processing / 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 / long-term synaptic potentiation / Platelet degranulation / nervous system development / myelin sheath 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: 3.4 Å | |||||||||
データ登録者 | Ma, D. / Guo, J. | |||||||||
| 資金援助 | 中国, 2件
| |||||||||
引用 | ジャーナル: Nat Chem Biol / 年: 2024タイトル: A small-molecule activation mechanism that directly opens the KCNQ2 channel. 著者: Shaoying Zhang / Demin Ma / Kun Wang / Ya Li / Zhenni Yang / Xiaoxiao Li / Junnan Li / Jiangnan He / Lianghe Mei / Yangliang Ye / Zongsheng Chen / Juwen Shen / Panpan Hou / Jiangtao Guo / ...著者: Shaoying Zhang / Demin Ma / Kun Wang / Ya Li / Zhenni Yang / Xiaoxiao Li / Junnan Li / Jiangnan He / Lianghe Mei / Yangliang Ye / Zongsheng Chen / Juwen Shen / Panpan Hou / Jiangtao Guo / Qiansen Zhang / Huaiyu Yang / ![]() 要旨: Pharmacological activation of voltage-gated ion channels by ligands serves as the basis for therapy and mainly involves a classic gating mechanism that augments the native voltage-dependent open ...Pharmacological activation of voltage-gated ion channels by ligands serves as the basis for therapy and mainly involves a classic gating mechanism that augments the native voltage-dependent open probability. Through structure-based virtual screening, we identified a new scaffold compound, Ebio1, serving as a potent and subtype-selective activator for the voltage-gated potassium channel KCNQ2 and featuring a new activation mechanism. Single-channel patch-clamp, cryogenic-electron microscopy and molecular dynamic simulations, along with chemical derivatives, reveal that Ebio1 engages the KCNQ2 activation by generating an extended channel gate with a larger conductance at the saturating voltage (+50 mV). This mechanism is different from the previously observed activation mechanism of ligands on voltage-gated ion channels. Ebio1 caused S6 helices from residues S303 and F305 to perform a twist-to-open movement, which was sufficient to open the KCNQ2 gate. Overall, our findings provide mechanistic insights into the activation of KCNQ2 channel by Ebio1 and lend support for KCNQ-related drug development. | |||||||||
| 履歴 |
|
-
構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
|---|
-
ダウンロードとリンク
-
ダウンロード
| PDBx/mmCIF形式 | 8ijk.cif.gz | 641.2 KB | 表示 | PDBx/mmCIF形式 |
|---|---|---|---|---|
| PDB形式 | pdb8ijk.ent.gz | 530.5 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 8ijk.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/ij/8ijk ftp://data.pdbj.org/pub/pdb/validation_reports/ij/8ijk | HTTPS FTP |
|---|
-関連構造データ
| 関連構造データ | ![]() 35487MC ![]() 8x43C 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 ( |
|---|---|
| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
-
リンク
-
集合体
| 登録構造単位 | ![]()
|
|---|---|
| 1 |
|
-
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: 16852.545 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-7PN / 研究の焦点であるリガンドがあるか | Y | |
|---|
-実験情報
-実験
| 実験 | 手法: 電子顕微鏡法 |
|---|---|
| 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 |
-
試料調製
| 構成要素 | 名称: human KCNQ2-CaM-Ebio1 complex in the presence of PIP2 タイプ: COMPLEX / Entity ID: #1-#2 / 由来: MULTIPLE SOURCES |
|---|---|
| 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 |
-
電子顕微鏡撮影
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
|---|---|
| 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) |
-
解析
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
|---|---|
| 3次元再構成 | 解像度: 3.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 28232 / 対称性のタイプ: POINT |
ムービー
コントローラー
万見について




Homo sapiens (ヒト)
中国, 2件
引用


PDBj























FIELD EMISSION GUN