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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 8q6t | ||||||||||||||||||
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タイトル | Helical reconstruction of the relaxed thick filament from FIB milled left ventricular mouse myofibrils | ||||||||||||||||||
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![]() | MOTOR PROTEIN / Mammalian / Muscle / Thick filament / Cardiac | ||||||||||||||||||
機能・相同性 | ![]() heart growth / forward locomotion / striated muscle cell development / regulation of relaxation of cardiac muscle / muscle cell fate specification / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / Striated Muscle Contraction / regulation of striated muscle contraction / detection of muscle stretch ...heart growth / forward locomotion / striated muscle cell development / regulation of relaxation of cardiac muscle / muscle cell fate specification / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / Striated Muscle Contraction / regulation of striated muscle contraction / detection of muscle stretch / muscle myosin complex / ventricular system development / cardiac myofibril assembly / regulation of the force of heart contraction / transition between fast and slow fiber / myosin filament / muscle cell development / adult heart development / cardiac muscle tissue morphogenesis / cardiac muscle hypertrophy in response to stress / muscle filament sliding / M band / myosin complex / A band / I band / structural constituent of muscle / ankyrin binding / sarcomere organization / intracellular membraneless organelle / ventricular cardiac muscle tissue morphogenesis / microfilament motor activity / heart contraction / positive regulation of the force of heart contraction / myofibril / actin monomer binding / skeletal muscle contraction / somitogenesis / ATP metabolic process / heart morphogenesis / stress fiber / cardiac muscle contraction / muscle contraction / regulation of heart rate / sarcomere / post-embryonic development / structural constituent of cytoskeleton / Z disc / actin filament binding / actin binding / heart development / protein tyrosine kinase activity / in utero embryonic development / eukaryotic translation initiation factor 2alpha kinase activity / 3-phosphoinositide-dependent protein kinase activity / DNA-dependent protein kinase activity / ribosomal protein S6 kinase activity / histone H3S10 kinase activity / histone H2AXS139 kinase activity / histone H3S28 kinase activity / histone H4S1 kinase activity / histone H2BS14 kinase activity / histone H3T3 kinase activity / histone H2AS121 kinase activity / Rho-dependent protein serine/threonine kinase activity / histone H2BS36 kinase activity / histone H3S57 kinase activity / histone H2AT120 kinase activity / AMP-activated protein kinase activity / histone H2AS1 kinase activity / histone H3T6 kinase activity / histone H3T11 kinase activity / histone H3T45 kinase activity / non-specific serine/threonine protein kinase / calmodulin binding / cell adhesion / protein serine kinase activity / calcium ion binding / ATP binding / metal ion binding / nucleus / cytoplasm 類似検索 - 分子機能 | ||||||||||||||||||
生物種 | ![]() ![]() | ||||||||||||||||||
手法 | 電子顕微鏡法 / サブトモグラム平均法 / クライオ電子顕微鏡法 / 解像度: 18 Å | ||||||||||||||||||
![]() | Tamborrini, D. / Raunser, S. | ||||||||||||||||||
資金援助 | ![]() ![]()
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![]() | ![]() タイトル: Structure of the native myosin filament in the relaxed cardiac sarcomere. 著者: Davide Tamborrini / Zhexin Wang / Thorsten Wagner / Sebastian Tacke / Markus Stabrin / Michael Grange / Ay Lin Kho / Martin Rees / Pauline Bennett / Mathias Gautel / Stefan Raunser / ![]() ![]() 要旨: The thick filament is a key component of sarcomeres, the basic units of striated muscle. Alterations in thick filament proteins are associated with familial hypertrophic cardiomyopathy and other ...The thick filament is a key component of sarcomeres, the basic units of striated muscle. Alterations in thick filament proteins are associated with familial hypertrophic cardiomyopathy and other heart and muscle diseases. Despite the central importance of the thick filament, its molecular organization remains unclear. Here we present the molecular architecture of native cardiac sarcomeres in the relaxed state, determined by cryo-electron tomography. Our reconstruction of the thick filament reveals the three-dimensional organization of myosin, titin and myosin-binding protein C (MyBP-C). The arrangement of myosin molecules is dependent on their position along the filament, suggesting specialized capacities in terms of strain susceptibility and force generation. Three pairs of titin-α and titin-β chains run axially along the filament, intertwining with myosin tails and probably orchestrating the length-dependent activation of the sarcomere. Notably, whereas the three titin-α chains run along the entire length of the thick filament, titin-β chains do not. The structure also demonstrates that MyBP-C bridges thin and thick filaments, with its carboxy-terminal region binding to the myosin tails and directly stabilizing the OFF state of the myosin heads in an unforeseen manner. These results provide a foundation for future research investigating muscle disorders involving sarcomeric components. | ||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 2.7 MB | 表示 | ![]() |
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PDB形式 | ![]() | 表示 | ![]() | |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 18198MC ![]() 8q4gC C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 223226.531 Da / 分子数: 6 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #2: タンパク質 | 分子量: 17243.553 Da / 分子数: 6 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | 分子量: 18259.512 Da / 分子数: 6 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #4: タンパク質 | 分子量: 44777.125 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #5: タンパク質 | 分子量: 118766.320 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: CELL / 3次元再構成法: サブトモグラム平均法 |
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試料調製
構成要素 | 名称: Relaxed thick filament; A-band region; C-type super-repeat タイプ: CELL 詳細: Single asymmetrical unit from the relaxed thick filament obtained from FIB milled left ventricular mouse myofibrils Entity ID: #1-#3, #5, #4 / 由来: NATURAL |
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由来(天然) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.1 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE-PROPANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 81000 X / 最大 デフォーカス(公称値): 6000 nm / 最小 デフォーカス(公称値): 3000 nm |
試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 3.4 e/Å2 / Avg electron dose per subtomogram: 140 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: 0 ° / 軸方向距離/サブユニット: 430 Å / らせん対称軸の対称性: C3 | |||||||||||||||||||||
3次元再構成 | 解像度: 18 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 1589 詳細: Helical reconstruction containing 4.5x repeats extrapolated from a 3x repeat reconstruction (EMD-18146) 対称性のタイプ: HELICAL | |||||||||||||||||||||
EM volume selection | Num. of tomograms: 89 / Num. of volumes extracted: 67492 | |||||||||||||||||||||
原子モデル構築 |
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