登録情報 データベース : EMDB / ID : EMD-23882 構造の表示 ダウンロードとリンクタイトル Vascular KATP channel: Kir6.1 SUR2B quatrefoil-like conformation 2 マップデータ 詳細 試料複合体 : Vascular KATP channel: Kir6.1 SUR2B quatrefoil-like conformation 2タンパク質・ペプチド : ATP-sensitive inward rectifier potassium channel 8タンパク質・ペプチド : Isoform SUR2B of ATP-binding cassette sub-family C member 9リガンド : POTASSIUM IONリガンド : ADENOSINE-5'-TRIPHOSPHATE 詳細 キーワード KATP / potassium channel / vascular / TRANSPORT 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
cardiac pacemaker cell differentiation / atrioventricular node cell differentiation / vascular process in circulatory system / substrate-dependent cell migration, cell contraction / reactive oxygen species biosynthetic process / oxygen metabolic process / ATP sensitive Potassium channels / reactive gliosis / response to decreased oxygen levels / potassium channel activator activity ... cardiac pacemaker cell differentiation / atrioventricular node cell differentiation / vascular process in circulatory system / substrate-dependent cell migration, cell contraction / reactive oxygen species biosynthetic process / oxygen metabolic process / ATP sensitive Potassium channels / reactive gliosis / response to decreased oxygen levels / potassium channel activator activity / ABC-family proteins mediated transport / response to peptide / response to resveratrol / ATP-activated inward rectifier potassium channel activity / glutamate secretion, neurotransmission / membrane repolarization during ventricular cardiac muscle cell action potential / inward rectifying potassium channel / sulfonylurea receptor activity / ventricular cardiac muscle tissue development / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / NLRP3 inflammasome complex assembly / response to potassium ion / CAMKK-AMPK signaling cascade / circulatory system development / cardiac conduction / response to oxygen levels / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / cellular response to potassium ion / response to hydrogen sulfide / cellular response to chemical stress / cellular respiration / ATPase-coupled monoatomic cation transmembrane transporter activity / regulation of monoatomic ion transmembrane transport / coronary vasculature development / vasculature development / cardiac muscle cell contraction / synaptic assembly at neuromuscular junction / regulation of potassium ion transmembrane transport / syntaxin binding / nervous system process / inorganic cation transmembrane transport / blood circulation / Ion homeostasis / cellular response to ATP / neuromuscular process / sulfonylurea receptor binding / response to ATP / heterocyclic compound binding / response to stress / establishment of cell polarity / blood vessel development / transmission of nerve impulse / p38MAPK cascade / fat cell differentiation / response to exogenous dsRNA / potassium ion import across plasma membrane / myofibril / monoatomic cation transmembrane transport / fatty acid oxidation / action potential / protein secretion / potassium channel activity / ATPase-coupled transmembrane transporter activity / ABC-type transporter activity / potassium channel regulator activity / fatty acid transport / ATP metabolic process / heart morphogenesis / skeletal muscle tissue development / presynaptic active zone membrane / negative regulation of blood pressure / potassium ion transmembrane transport / T-tubule / response to cytokine / regulation of heart rate / cellular response to calcium ion / response to endoplasmic reticulum stress / acrosomal vesicle / blood vessel diameter maintenance / sarcomere / response to ischemia / regulation of membrane potential / response to activity / kidney development / determination of adult lifespan / mitochondrion organization / response to insulin / microglial cell activation / potassium ion transport / sarcolemma / calcium ion transmembrane transport / response to hydrogen peroxide / transmembrane transport / regulation of blood pressure / response to estrogen / vasodilation / MAPK cascade / cellular response to xenobiotic stimulus / presynapse / heart development 類似検索 - 分子機能 Potassium channel, inwardly rectifying, Kir6.1 / ATP-binding cassette subfamily C member 9 / : / Sulphonylurea receptor / Potassium channel, inwardly rectifying, transmembrane domain / Inward rectifier potassium channel transmembrane domain / Potassium channel, inwardly rectifying, Kir, cytoplasmic / Potassium channel, inwardly rectifying, Kir / Inward rectifier potassium channel, C-terminal / Inward rectifier potassium channel C-terminal domain ... Potassium channel, inwardly rectifying, Kir6.1 / ATP-binding cassette subfamily C member 9 / : / Sulphonylurea receptor / Potassium channel, inwardly rectifying, transmembrane domain / Inward rectifier potassium channel transmembrane domain / Potassium channel, inwardly rectifying, Kir, cytoplasmic / Potassium channel, inwardly rectifying, Kir / Inward rectifier potassium channel, C-terminal / Inward rectifier potassium channel C-terminal domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / Immunoglobulin E-set / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性 ATP-binding cassette sub-family C member 9 / ATP-sensitive inward rectifier potassium channel 8 類似検索 - 構成要素生物種 Rattus norvegicus (ドブネズミ)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 4.2 Å 詳細 データ登録者Sung MW / Shyng SL 資金援助 米国, 1件 詳細 詳細を隠すOrganization Grant number 国 National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK) R01DK066485-13 米国
引用ジャーナル : Proc Natl Acad Sci U S A / 年 : 2021タイトル : Vascular K channel structural dynamics reveal regulatory mechanism by Mg-nucleotides.著者 : Min Woo Sung / Zhongying Yang / Camden M Driggers / Bruce L Patton / Barmak Mostofian / John D Russo / Daniel M Zuckerman / Show-Ling Shyng / 要旨 : Vascular tone is dependent on smooth muscle K channels comprising pore-forming Kir6.1 and regulatory SUR2B subunits, in which mutations cause Cantú syndrome. Unique among K isoforms, they lack ... Vascular tone is dependent on smooth muscle K channels comprising pore-forming Kir6.1 and regulatory SUR2B subunits, in which mutations cause Cantú syndrome. Unique among K isoforms, they lack spontaneous activity and require Mg-nucleotides for activation. Structural mechanisms underlying these properties are unknown. Here, we determined cryogenic electron microscopy structures of vascular K channels bound to inhibitory ATP and glibenclamide, which differ informatively from similarly determined pancreatic K channel isoform (Kir6.2/SUR1). Unlike SUR1, SUR2B subunits adopt distinct rotational "propeller" and "quatrefoil" geometries surrounding their Kir6.1 core. The glutamate/aspartate-rich linker connecting the two halves of the SUR-ABC core is observed in a quatrefoil-like conformation. Molecular dynamics simulations reveal MgADP-dependent dynamic tripartite interactions between this linker, SUR2B, and Kir6.1. The structures captured implicate a progression of intermediate states between MgADP-free inactivated, and MgADP-bound activated conformations wherein the glutamate/aspartate-rich linker participates as mobile autoinhibitory domain, suggesting a conformational pathway toward K channel activation. 履歴 登録 2021年4月20日 - ヘッダ(付随情報) 公開 2021年10月13日 - マップ公開 2021年10月13日 - 更新 2024年10月30日 - 現状 2024年10月30日 処理サイト : RCSB / 状態 : 公開
すべて表示 表示を減らす