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 / ruffle organization / positive regulation of ATP-dependent activity / 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 / ventricular cardiac muscle tissue morphogenesis / myosin heavy chain binding / heart contraction / regulation of heart contraction / tropomyosin binding / negative regulation of vascular associated smooth muscle cell migration / troponin I binding / filamentous actin / mesenchyme migration / negative regulation of vascular associated smooth muscle cell proliferation / actin filament bundle / actin filament bundle assembly / skeletal muscle myofibril / striated muscle thin filament / skeletal muscle thin filament assembly / actin monomer binding / Smooth Muscle Contraction / skeletal muscle contraction / calcium channel inhibitor activity / vasculogenesis / stress fiber / skeletal muscle fiber development / Ion homeostasis / cytoskeletal protein binding / cardiac muscle contraction / positive regulation of stress fiber assembly / titin binding / actin filament polymerization / cytoskeleton organization / positive regulation of cell adhesion / negative regulation of cell migration / sarcomere / actin filament organization / filopodium / cellular response to reactive oxygen species / actin filament / wound healing / 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 / structural constituent of cytoskeleton / ruffle membrane / intracellular calcium ion homeostasis / response to calcium ion / calcium-dependent protein binding / actin filament binding / lamellipodium / actin cytoskeleton / regulation of cell shape / actin binding / heart development / cell body / cytoskeleton / hydrolase activity / protein domain specific binding / protein heterodimerization activity / calcium ion binding / positive regulation of gene expression / protein kinase binding / magnesium ion binding / protein homodimerization activity / ATP binding / identical protein binding / cytosol / cytoplasm 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 / ATPase, nucleotide binding domain / EF-Hand 1, calcium-binding site / 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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