登録情報 データベース : EMDB / ID : EMD-33316 ダウンロードとリンクタイトル human KCNQ1-CaM in apo state マップデータ 詳細 試料細胞器官・細胞要素 : KCNQ1-CaM complexタンパク質・ペプチド : Potassium voltage-gated channel subfamily KQT member 1タンパク質・ペプチド : Calmodulin-3 詳細 キーワード potassium voltage-gated channel / 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 / iodide transport / regulation of gastric acid secretion / stomach development ... 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 / iodide transport / regulation of gastric acid secretion / stomach development / voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization / membrane repolarization during atrial cardiac muscle cell action potential / Phase 3 - rapid repolarisation / 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 / detection of mechanical stimulus involved in sensory perception of sound / auditory receptor cell development / 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 / regulation of membrane repolarization / protein phosphatase 1 binding / delayed rectifier potassium channel activity / positive regulation of potassium ion transmembrane transport / ventricular cardiac muscle cell action potential / Voltage gated Potassium channels / potassium ion homeostasis / non-motile cilium assembly / regulation of ventricular cardiac muscle cell membrane repolarization / cardiac muscle cell contraction / outward rectifier potassium channel activity / intestinal absorption / inner ear morphogenesis / negative regulation of high voltage-gated calcium channel activity / negative regulation of calcium ion export across plasma membrane / adrenergic receptor signaling pathway / cochlea development / presynaptic endocytosis / renal absorption / regulation of heart contraction / regulation of cardiac muscle cell action potential / ciliary base / positive regulation of ryanodine-sensitive calcium-release channel activity / protein kinase A regulatory subunit binding / regulation of cell communication by electrical coupling involved in cardiac conduction / protein kinase A catalytic subunit binding / negative regulation of ryanodine-sensitive calcium-release channel activity / social behavior / potassium ion import across plasma membrane / calcineurin-mediated signaling / inner ear development / regulation of heart rate by cardiac conduction / action potential / protein phosphatase activator activity / adenylate cyclase binding / voltage-gated potassium channel activity / monoatomic ion channel complex / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / positive regulation of heart rate / transport vesicle / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / cardiac muscle contraction / regulation of calcium-mediated signaling / titin binding / cellular response to cAMP / voltage-gated potassium channel complex / phosphatidylinositol-4,5-bisphosphate binding / cellular response to epinephrine stimulus / potassium ion transmembrane transport / sperm midpiece / substantia nigra development / calcium channel complex / positive regulation of cardiac muscle contraction / calyx of Held / cytoplasmic vesicle membrane / adenylate cyclase activator activity / regulation of heart rate / erythrocyte differentiation / protein serine/threonine kinase activator activity / sarcomere / regulation of cytokinesis / spindle microtubule / response to insulin / sensory perception of sound / regulation of blood pressure / long-term synaptic potentiation / response to calcium ion / glucose metabolic process / spindle pole / calcium-dependent protein binding 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 : 3.5 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28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
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