登録情報 データベース : EMDB / ID : EMD-0728 構造の表示 ダウンロードとリンクタイトル Structure of human cardiac thin filament in the calcium free state マップデータ 詳細 試料複合体 : Cardiac muscle thin filament in the calcium free state複合体 : Actin, alpha skeletal muscleタンパク質・ペプチド : Actin, alpha skeletal muscle複合体 : Tropomyosin, Troponinタンパク質・ペプチド : Tropomyosin alpha-1 chainタンパク質・ペプチド : Tropomyosin alpha-1 chainタンパク質・ペプチド : Troponin T, cardiac muscleタンパク質・ペプチド : Troponin I, cardiac muscleタンパク質・ペプチド : Troponin C, slow skeletal and cardiac musclesリガンド : ADENOSINE-5'-DIPHOSPHATE 詳細 キーワード Troponin / Tropomyosin / Actin / Thin filement / Muscle / CONTRACTILE PROTEIN-ACTIN BINDING PROTEIN complex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
positive regulation of heart rate by epinephrine / muscle thin filament tropomyosin / regulation of systemic arterial blood pressure by ischemic conditions / troponin C binding / diaphragm contraction / regulation of ATP-dependent activity / regulation of muscle filament sliding speed / troponin T binding / cardiac myofibril / cardiac Troponin complex ... positive regulation of heart rate by epinephrine / muscle thin filament tropomyosin / regulation of systemic arterial blood pressure by ischemic conditions / troponin C binding / diaphragm contraction / regulation of ATP-dependent activity / regulation of muscle filament sliding speed / troponin T binding / cardiac myofibril / cardiac Troponin complex / bleb / troponin complex / regulation of muscle contraction / regulation of smooth muscle contraction / negative regulation of ATP-dependent activity / transition between fast and slow fiber / positive regulation of ATP-dependent activity / ruffle organization / Striated Muscle Contraction / muscle filament sliding / response to metal ion / regulation of cardiac muscle contraction by calcium ion signaling / structural constituent of muscle / sarcomere organization / cytoskeletal motor activator activity / myosin heavy chain binding / ventricular cardiac muscle tissue morphogenesis / heart contraction / tropomyosin binding / regulation of heart contraction / negative regulation of vascular associated smooth muscle cell migration / actin filament bundle / troponin I binding / filamentous actin / mesenchyme migration / negative regulation of vascular associated smooth muscle cell proliferation / skeletal muscle myofibril / actin filament bundle assembly / striated muscle thin filament / skeletal muscle thin filament assembly / actin monomer binding / Smooth Muscle Contraction / skeletal muscle contraction / vasculogenesis / calcium channel inhibitor activity / cytoskeletal protein binding / skeletal muscle fiber development / cardiac muscle contraction / stress fiber / positive regulation of stress fiber assembly / Ion homeostasis / titin binding / actin filament polymerization / cytoskeleton organization / positive regulation of cell adhesion / negative regulation of cell migration / actin filament organization / sarcomere / cellular response to reactive oxygen species / actin filament / filopodium / wound healing / response to calcium ion / structural constituent of cytoskeleton / 加水分解酵素; 酸無水物に作用; 酸無水物に作用・細胞または細胞小器官の運動に関与 / ruffle membrane / intracellular calcium ion homeostasis / calcium-dependent protein binding / actin filament binding / regulation of cell shape / lamellipodium / actin cytoskeleton / heart development / cell body / actin binding / cytoskeleton / hydrolase activity / protein heterodimerization activity / protein domain specific binding / calcium ion binding / positive regulation of gene expression / protein kinase binding / magnesium ion binding / protein homodimerization activity / ATP binding / identical protein binding / cytoplasm / cytosol 類似検索 - 分子機能 Troponin T / Troponin I residues 1-32 / Troponin I residues 1-32 / : / Troponin / Troponin domain superfamily / Troponin / Tropomyosins signature. / Tropomyosin / Tropomyosin ... Troponin T / Troponin I residues 1-32 / Troponin I residues 1-32 / : / Troponin / Troponin domain superfamily / Troponin / Tropomyosins signature. / Tropomyosin / Tropomyosin / EF-hand domain pair / : / Actins signature 1. / Actin, conserved site / Actins signature 2. / Actin/actin-like conserved site / Actins and actin-related proteins signature. / Actin / Actin family / Actin / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / ATPase, nucleotide binding domain / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / EF-hand domain pair 類似検索 - ドメイン・相同性 Tropomyosin alpha-1 chain / Troponin I, cardiac muscle / Troponin T, cardiac muscle / Troponin C, slow skeletal and cardiac muscles / Actin, alpha skeletal muscle 類似検索 - 構成要素生物種 Oryctolagus cuniculus (ウサギ) / 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 : 6.6 Å 詳細 データ登録者Fujii T / Yamada Y 引用ジャーナル : Nat Commun / 年 : 2020タイトル : Cardiac muscle thin filament structures reveal calcium regulatory mechanism.著者 : Yurika Yamada / Keiichi Namba / Takashi Fujii / 要旨 : Contraction of striated muscles is driven by cyclic interactions of myosin head projecting from the thick filament with actin filament and is regulated by Ca released from sarcoplasmic reticulum. ... Contraction of striated muscles is driven by cyclic interactions of myosin head projecting from the thick filament with actin filament and is regulated by Ca released from sarcoplasmic reticulum. Muscle thin filament consists of actin, tropomyosin and troponin, and Ca binding to troponin triggers conformational changes of troponin and tropomyosin to allow actin-myosin interactions. However, the structural changes involved in this regulatory mechanism remain unknown. Here we report the structures of human cardiac muscle thin filament in the absence and presence of Ca by electron cryomicroscopy. Molecular models in the two states built based on available crystal structures reveal the structures of a C-terminal region of troponin I and an N-terminal region of troponin T in complex with the head-to-tail junction of tropomyosin together with the troponin core on actin filament. Structural changes of the thin filament upon Ca binding now reveal the mechanism of Ca regulation of muscle contraction. 履歴 登録 2019年8月3日 - ヘッダ(付随情報) 公開 2020年1月15日 - マップ公開 2020年1月15日 - 更新 2024年3月27日 - 現状 2024年3月27日 処理サイト : PDBj / 状態 : 公開
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