登録情報 データベース : EMDB / ID : EMD-30246 構造の表示 ダウンロードとリンクタイトル Cryo-EM structure of human KCNQ4 with linopirdine マップデータ 詳細 試料複合体 : Complex of human KCNQ4 and linopirdineタンパク質・ペプチド : Green fluorescent protein,Potassium voltage-gated channel subfamily KQT member 4タンパク質・ペプチド : Calmodulin-3リガンド : [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoateリガンド : POTASSIUM IONリガンド : 1-phenyl-3,3-bis(pyridin-4-ylmethyl)indol-2-one 詳細 キーワード KCNQ / Channel / Calmodulin / PIP2 / linopirdine / MEMBRANE PROTEIN機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
transporter inhibitor activity / establishment of protein localization to mitochondrial membrane / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / Sensory processing of sound by outer hair cells of the cochlea / Sensory processing of sound by inner hair cells of the cochlea / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / response to corticosterone ... transporter inhibitor activity / establishment of protein localization to mitochondrial membrane / Voltage gated Potassium channels / type 3 metabotropic glutamate receptor binding / Sensory processing of sound by outer hair cells of the cochlea / Sensory processing of sound by inner hair cells of the cochlea / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / response to corticosterone / nitric-oxide synthase binding / presynaptic endocytosis / regulation of cardiac muscle cell action potential / regulation of synaptic vesicle exocytosis / regulation of cell communication by electrical coupling involved in cardiac conduction / calcineurin-mediated signaling / regulation of synaptic vesicle endocytosis / protein phosphatase activator activity / adenylate cyclase binding / voltage-gated potassium channel activity / postsynaptic cytosol / catalytic complex / potassium channel activity / detection of calcium ion / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / phosphatidylinositol 3-kinase binding / presynaptic cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / regulation of calcium-mediated signaling / titin binding / voltage-gated potassium channel complex / potassium ion transmembrane transport / sperm midpiece / substantia nigra development / calcium channel complex / calcium channel regulator activity / calyx of Held / nitric-oxide synthase regulator activity / response to amphetamine / adenylate cyclase activator activity / regulation of heart rate / bioluminescence / protein serine/threonine kinase activator activity / sarcomere / basal plasma membrane / regulation of cytokinesis / generation of precursor metabolites and energy / spindle microtubule / sensory perception of sound / potassium ion transport / mitochondrial membrane / Schaffer collateral - CA1 synapse / long-term synaptic potentiation / response to calcium ion / synaptic vesicle membrane / spindle pole / calcium-dependent protein binding / G2/M transition of mitotic cell cycle / myelin sheath / growth cone / vesicle / transmembrane transporter binding / G protein-coupled receptor signaling pathway / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / protein-containing complex / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能 Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / EF-hand domain pair / EF-hand, calcium binding motif ... Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / : / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair 類似検索 - ドメイン・相同性 Calmodulin-3 / Green fluorescent protein / Potassium voltage-gated channel subfamily KQT member 4 類似検索 - 構成要素生物種 Homo sapiens (ヒト)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 3.3 Å 詳細 データ登録者Shen H / Li T 引用ジャーナル : Mol Cell / 年 : 2021タイトル : Structural Basis for the Modulation of Human KCNQ4 by Small-Molecule Drugs.著者 : Tian Li / Kun Wu / Zhenlei Yue / Yifei Wang / Fan Zhang / Huaizong Shen / 要旨 : Among the five KCNQ channels, also known as the K7 voltage-gated potassium (K) channels, KCNQ2-KCNQ5 control neuronal excitability. Dysfunctions of KCNQ2-KCNQ5 are associated with neurological ... Among the five KCNQ channels, also known as the K7 voltage-gated potassium (K) channels, KCNQ2-KCNQ5 control neuronal excitability. Dysfunctions of KCNQ2-KCNQ5 are associated with neurological disorders such as epilepsy, deafness, and neuropathic pain. Here, we report the cryoelectron microscopy (cryo-EM) structures of human KCNQ4 and its complexes with the opener retigabine or the blocker linopirdine at overall resolutions of 2.5, 3.1, and 3.3 Å, respectively. In all structures, a phosphatidylinositol 4,5-bisphosphate (PIP) molecule inserts its head group into a cavity within each voltage-sensing domain (VSD), revealing an unobserved binding mode for PIP. Retigabine nestles in each fenestration, inducing local shifts. Instead of staying within the central pore, linopirdine resides in a cytosolic cavity underneath the inner gate. Electrophysiological analyses of various mutants corroborated the structural observations. Our studies reveal the molecular basis for the modulatory mechanism of neuronal KCNQ channels and provide a framework for structure-facilitated drug discovery targeting these important channels. 履歴 登録 2020年4月23日 - ヘッダ(付随情報) 公開 2020年12月2日 - マップ公開 2020年12月2日 - 更新 2025年6月18日 - 現状 2025年6月18日 処理サイト : PDBj / 状態 : 公開
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