登録情報 データベース : EMDB / ID : EMD-33319 ダウンロードとリンクタイトル human KCNQ1-CaM-ML277-PIP2 complex in state B マップデータ 詳細 試料細胞器官・細胞要素 : human KCNQ1-CaM-ML277-PIP2 complex in state Bタンパク質・ペプチド : Calmodulin-3タンパク質・ペプチド : Potassium voltage-gated channel subfamily KQT member 1リガンド : POTASSIUM IONリガンド : (2R)-N-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-1-(4-methylbenzene-1-sulfonyl)piperidine-2-carboxamideリガンド : [(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate 詳細 キーワード potassium voltage-gated channel / ML277 / PIP2 / 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
gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior / regulation of gastric acid secretion / stomach development / iodide transport ... gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior / regulation of gastric acid secretion / stomach development / iodide transport / voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization / Phase 3 - rapid repolarisation / transporter inhibitor activity / membrane repolarization during atrial cardiac muscle cell action potential / membrane repolarization during action potential / regulation of atrial cardiac muscle cell membrane repolarization / Phase 2 - plateau phase / intracellular chloride ion homeostasis / membrane repolarization during ventricular cardiac muscle cell action potential / membrane repolarization during cardiac muscle cell action potential / negative regulation of delayed rectifier potassium channel activity / renal sodium ion absorption / potassium ion export across plasma membrane / atrial cardiac muscle cell action potential / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / auditory receptor cell development / detection of mechanical stimulus involved in sensory perception of sound / regulation of membrane repolarization / protein phosphatase 1 binding / delayed rectifier potassium channel activity / ventricular cardiac muscle cell action potential / Voltage gated Potassium channels / potassium ion homeostasis / regulation of ventricular cardiac muscle cell membrane repolarization / positive regulation of potassium ion transmembrane transport / non-motile cilium assembly / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / cardiac muscle cell contraction / outward rectifier potassium channel activity / intestinal absorption / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / response to corticosterone / adrenergic receptor signaling pathway / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / cochlea development / regulation of heart contraction / renal absorption / nitric-oxide synthase binding / ciliary base / presynaptic endocytosis / protein kinase A regulatory subunit binding / regulation of cell communication by electrical coupling involved in cardiac conduction / protein kinase A catalytic subunit binding / calcineurin-mediated signaling / potassium ion import across plasma membrane / regulation of synaptic vesicle exocytosis / social behavior / regulation of heart rate by cardiac conduction / inner ear development / action potential / protein phosphatase activator activity / adenylate cyclase binding / voltage-gated potassium channel activity / catalytic complex / regulation of synaptic vesicle endocytosis / monoatomic ion channel complex / detection of calcium ion / postsynaptic cytosol / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / positive regulation of heart rate / presynaptic cytosol / phosphatidylinositol 3-kinase binding / transport vesicle / cardiac muscle contraction / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / sperm midpiece / voltage-gated potassium channel complex / cellular response to cAMP / regulation of calcium-mediated signaling / phosphatidylinositol-4,5-bisphosphate binding / cellular response to epinephrine stimulus / potassium ion transmembrane transport / calcium channel complex / substantia nigra development / positive regulation of cardiac muscle contraction / calcium channel regulator activity / response to amphetamine / nitric-oxide synthase regulator activity / regulation of heart rate / adenylate cyclase activator activity / cytoplasmic vesicle membrane / calyx of Held / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis 類似検索 - 分子機能 Potassium channel, voltage dependent, KCNQ1 / Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / Voltage-dependent channel domain superfamily / : / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. ... Potassium channel, voltage dependent, KCNQ1 / Potassium channel, voltage dependent, KCNQ / Potassium channel, voltage dependent, KCNQ, C-terminal / KCNQ voltage-gated potassium channel / Voltage-dependent channel domain superfamily / : / 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 / Potassium voltage-gated channel subfamily KQT member 1 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 : 2.5 Å 詳細 データ登録者Ma D / Guo J 資金援助 中国, 6件 詳細 詳細を隠すOrganization Grant number 国 Ministry of Science and Technology (MoST, China) 2020YFA0908501 中国 Ministry of Science and Technology (MoST, China) 2018YFA0508100 中国 National Natural Science Foundation of China (NSFC) 31870724 中国 National Natural Science Foundation of China (NSFC) 81800231 中国 Other government LR19C050002 Other government 2021FZZX001-28
引用ジャーナル : Proc Natl Acad Sci U S A / 年 : 2022タイトル : Structural mechanisms for the activation of human cardiac KCNQ1 channel by electro-mechanical coupling enhancers.著者 : Demin Ma / Ling Zhong / Zhenzhen Yan / Jing Yao / Yan Zhang / Fan Ye / Yuan Huang / Dongwu Lai / Wei Yang / Panpan Hou / Jiangtao Guo / 要旨 : The cardiac KCNQ1 potassium channel carries the important current and controls the heart rhythm. Hundreds of mutations in KCNQ1 can cause life-threatening cardiac arrhythmia. Although KCNQ1 ... The cardiac KCNQ1 potassium channel carries the important current and controls the heart rhythm. Hundreds of mutations in KCNQ1 can cause life-threatening cardiac arrhythmia. Although KCNQ1 structures have been recently resolved, the structural basis for the dynamic electro-mechanical coupling, also known as the voltage sensor domain-pore domain (VSD-PD) coupling, remains largely unknown. In this study, utilizing two VSD-PD coupling enhancers, namely, the membrane lipid phosphatidylinositol 4,5-bisphosphate (PIP) and a small-molecule ML277, we determined 2.5-3.5 Å resolution cryo-electron microscopy structures of full-length human KCNQ1-calmodulin (CaM) complex in the apo closed, ML277-bound open, and ML277-PIP-bound open states. ML277 binds at the "elbow" pocket above the S4-S5 linker and directly induces an upward movement of the S4-S5 linker and the opening of the activation gate without affecting the C-terminal domain (CTD) of KCNQ1. PIP binds at the cleft between the VSD and the PD and brings a large structural rearrangement of the CTD together with the CaM to activate the PD. These findings not only elucidate the structural basis for the dynamic VSD-PD coupling process during KCNQ1 gating but also pave the way to develop new therapeutics for anti-arrhythmia. 履歴 登録 2022年4月29日 - ヘッダ(付随情報) 公開 2022年12月14日 - マップ公開 2022年12月14日 - 更新 2024年7月3日 - 現状 2024年7月3日 処理サイト : PDBj / 状態 : 公開
すべて表示 表示を減らす