登録情報 データベース : PDB / ID : 7k18 構造の表示 ダウンロードとリンクタイトル Cardiac Sodium channel with toxin bound 要素Alpha-like toxin Lqh3 Sodium channel protein type 5 subunit alpha, Enhanced Green fluorescent protein 詳細キーワード MEMBRANE PROTEIN / Ion channel / Toxin bound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
cell communication involved in cardiac conduction / voltage-gated sodium channel activity involved in AV node cell action potential / voltage-gated sodium channel activity involved in bundle of His cell action potential / voltage-gated sodium channel activity involved in Purkinje myocyte action potential / voltage-gated sodium channel activity involved in SA node cell action potential / bundle of His cell action potential / regulation of ventricular cardiac muscle cell membrane depolarization / AV node cell action potential / SA node cell action potential / AV node cell to bundle of His cell communication ... cell communication involved in cardiac conduction / voltage-gated sodium channel activity involved in AV node cell action potential / voltage-gated sodium channel activity involved in bundle of His cell action potential / voltage-gated sodium channel activity involved in Purkinje myocyte action potential / voltage-gated sodium channel activity involved in SA node cell action potential / bundle of His cell action potential / regulation of ventricular cardiac muscle cell membrane depolarization / AV node cell action potential / SA node cell action potential / AV node cell to bundle of His cell communication / membrane depolarization during SA node cell action potential / response to denervation involved in regulation of muscle adaptation / sodium channel complex / membrane depolarization during atrial cardiac muscle cell action potential / cardiac ventricle development / regulation of atrial cardiac muscle cell membrane repolarization / voltage-gated sodium channel activity involved in cardiac muscle cell action potential / brainstem development / membrane depolarization during AV node cell action potential / regulation of atrial cardiac muscle cell membrane depolarization / membrane depolarization during bundle of His cell action potential / positive regulation of action potential / atrial cardiac muscle cell action potential / membrane depolarization during Purkinje myocyte cell action potential / telencephalon development / membrane depolarization during cardiac muscle cell action potential / membrane depolarization during action potential / positive regulation of sodium ion transport / regulation of sodium ion transmembrane transport / ventricular cardiac muscle cell action potential / regulation of ventricular cardiac muscle cell membrane repolarization / cardiac muscle cell action potential involved in contraction / voltage-gated sodium channel complex / sodium channel inhibitor activity / sodium ion import across plasma membrane / regulation of cardiac muscle cell contraction / voltage-gated sodium channel activity / ankyrin binding / odontogenesis of dentin-containing tooth / sodium ion transport / regulation of heart rate by cardiac conduction / fibroblast growth factor binding / nitric-oxide synthase binding / intercalated disc / lateral plasma membrane / membrane depolarization / positive regulation of heart rate / neuronal action potential / cardiac muscle contraction / T-tubule / sensory perception of pain / regulation of heart rate / cellular response to calcium ion / establishment of localization in cell / cerebellum development / bioluminescence / positive regulation of epithelial cell proliferation / sodium ion transmembrane transport / generation of precursor metabolites and energy / defense response / sarcolemma / caveola / Z disc / toxin activity / scaffold protein binding / transmembrane transporter binding / calmodulin binding / protein domain specific binding / axon / ubiquitin protein ligase binding / protein kinase binding / nucleolus / perinuclear region of cytoplasm / enzyme binding / cell surface / endoplasmic reticulum / extracellular region / nucleoplasm / membrane / plasma membrane 類似検索 - 分子機能 Voltage gated sodium channel, alpha-5 subunit / Scorpion long chain toxin / LCN-type cysteine-stabilized alpha/beta (CS-alpha/beta) domain / LCN-type cysteine-stabilized alpha/beta (CS-alpha/beta) domain profile. / Scorpion long chain toxin/defensin / Scorpion toxin-like domain / Voltage-gated potassium channels. Chain C / Knottins / Knottin, scorpion toxin-like / Voltage-gated Na+ ion channel, cytoplasmic domain ... Voltage gated sodium channel, alpha-5 subunit / Scorpion long chain toxin / LCN-type cysteine-stabilized alpha/beta (CS-alpha/beta) domain / LCN-type cysteine-stabilized alpha/beta (CS-alpha/beta) domain profile. / Scorpion long chain toxin/defensin / Scorpion toxin-like domain / Voltage-gated potassium channels. Chain C / Knottins / Knottin, scorpion toxin-like / Voltage-gated Na+ ion channel, cytoplasmic domain / Cytoplasmic domain of voltage-gated Na+ ion channel / Sodium ion transport-associated / Voltage-gated sodium channel alpha subunit, inactivation gate / : / Sodium ion transport-associated / SCN5A-like, C-terminal IQ motif / Voltage gated sodium channel, alpha subunit / Knottin, scorpion toxin-like superfamily / Voltage-gated cation channel calcium and sodium / Voltage-dependent channel domain superfamily / Green fluorescent protein, GFP / Green fluorescent protein-related / Green fluorescent protein / Green fluorescent protein / Four Helix Bundle (Hemerythrin (Met), subunit A) / Ion transport domain / Ion transport protein / Up-down Bundle / Mainly Alpha 類似検索 - ドメイン・相同性 Chem-6OU / Sodium channel protein type 5 subunit alpha / Green fluorescent protein / Alpha-like toxin Lqh3 類似検索 - 構成要素生物種 Rattus norvegicus (ドブネズミ)Aequorea victoria (オワンクラゲ)Leiurus hebraeus (サソリ)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 : 3.3 Å 詳細データ登録者 Jiang, D. / Catterall, W.A. 資金援助 米国, 2件 詳細 詳細を隠す組織 認可番号 国 National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI) HL112808 米国 Howard Hughes Medical Institute (HHMI) 米国
引用ジャーナル : Nat Commun / 年 : 2021タイトル : Structural basis for voltage-sensor trapping of the cardiac sodium channel by a deathstalker scorpion toxin.著者 : Daohua Jiang / Lige Tonggu / Tamer M Gamal El-Din / Richard Banh / Régis Pomès / Ning Zheng / William A Catterall / 要旨 : Voltage-gated sodium (Na) channels initiate action potentials in excitable cells, and their function is altered by potent gating-modifier toxins. The α-toxin LqhIII from the deathstalker scorpion ... Voltage-gated sodium (Na) channels initiate action potentials in excitable cells, and their function is altered by potent gating-modifier toxins. The α-toxin LqhIII from the deathstalker scorpion inhibits fast inactivation of cardiac Na1.5 channels with IC = 11.4 nM. Here we reveal the structure of LqhIII bound to Na1.5 at 3.3 Å resolution by cryo-EM. LqhIII anchors on top of voltage-sensing domain IV, wedged between the S1-S2 and S3-S4 linkers, which traps the gating charges of the S4 segment in a unique intermediate-activated state stabilized by four ion-pairs. This conformational change is propagated inward to weaken binding of the fast inactivation gate and favor opening the activation gate. However, these changes do not permit Na permeation, revealing why LqhIII slows inactivation of Na channels but does not open them. Our results provide important insights into the structural basis for gating-modifier toxin binding, voltage-sensor trapping, and fast inactivation of Na channels. 履歴 登録 2020年9月7日 登録サイト : RCSB / 処理サイト : RCSB改定 1.0 2021年1月20日 Provider : repository / タイプ : Initial release改定 1.1 2024年12月25日 Group : Advisory / Data collection ... Advisory / Data collection / Database references / Derived calculations / Structure summary カテゴリ : chem_comp_atom / chem_comp_bond ... chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature / pdbx_validate_close_contact / struct_conn Item : _database_2.pdbx_DOI / _database_2.pdbx_database_accession ... _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
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