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基本情報
登録情報 | データベース: PDB / ID: 8g4l | |||||||||||||||
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タイトル | Cryo-EM structure of the human cardiac myosin filament | |||||||||||||||
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![]() | CONTRACTILE PROTEIN / cardiac / myosin / filament / complex | |||||||||||||||
機能・相同性 | ![]() myosin II heavy chain binding / C zone / regulation of muscle filament sliding / muscle cell fate specification / striated muscle myosin thick filament / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / sarcomerogenesis / titin-telethonin complex / structural molecule activity conferring elasticity ...myosin II heavy chain binding / C zone / regulation of muscle filament sliding / muscle cell fate specification / striated muscle myosin thick filament / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / sarcomerogenesis / titin-telethonin complex / structural molecule activity conferring elasticity / skeletal muscle myosin thick filament assembly / telethonin binding / A band / regulation of striated muscle contraction / cardiac myofibril / detection of muscle stretch / muscle alpha-actinin binding / muscle myosin complex / : / cardiac myofibril assembly / regulation of the force of heart contraction / transition between fast and slow fiber / myosin filament / positive regulation of ATP-dependent activity / adult heart development / cardiac muscle hypertrophy / mitotic chromosome condensation / cardiac muscle tissue morphogenesis / Striated Muscle Contraction / cardiac muscle hypertrophy in response to stress / muscle filament sliding / protein kinase regulator activity / actinin binding / myosin complex / M band / regulation of cardiac muscle cell contraction / myosin II complex / I band / cardiac muscle cell development / structural constituent of muscle / sarcomere organization / microfilament motor activity / myosin heavy chain binding / ventricular cardiac muscle tissue morphogenesis / heart contraction / myosin binding / myofibril / positive regulation of the force of heart contraction / ATPase activator activity / cytoskeletal motor activity / striated muscle thin filament / skeletal muscle thin filament assembly / actin monomer binding / skeletal muscle contraction / striated muscle contraction / heart morphogenesis / ATP metabolic process / skeletal muscle tissue development / cardiac muscle contraction / stress fiber / titin binding / muscle contraction / regulation of heart rate / sarcomere / condensed nuclear chromosome / post-embryonic development / positive regulation of protein secretion / negative regulation of cell growth / response to calcium ion / Z disc / actin filament binding / Platelet degranulation / heart development / actin binding / protease binding / protein tyrosine kinase activity / cytoskeleton / calmodulin binding / non-specific serine/threonine protein kinase / protein kinase activity / cell adhesion / protein serine kinase activity / protein serine/threonine kinase activity / calcium ion binding / positive regulation of gene expression / protein kinase binding / enzyme binding / protein homodimerization activity / extracellular exosome / extracellular region / ATP binding / metal ion binding / identical protein binding / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||||||||
生物種 | ![]() | |||||||||||||||
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: 6.4 Å | |||||||||||||||
![]() | Dutta, D. / Nguyen, V. / Padron, R. / Craig, R. | |||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Cryo-EM structure of the human cardiac myosin filament. 著者: Debabrata Dutta / Vu Nguyen / Kenneth S Campbell / Raúl Padrón / Roger Craig / ![]() 要旨: Pumping of the heart is powered by filaments of the motor protein myosin that pull on actin filaments to generate cardiac contraction. In addition to myosin, the filaments contain cardiac myosin- ...Pumping of the heart is powered by filaments of the motor protein myosin that pull on actin filaments to generate cardiac contraction. In addition to myosin, the filaments contain cardiac myosin-binding protein C (cMyBP-C), which modulates contractility in response to physiological stimuli, and titin, which functions as a scaffold for filament assembly. Myosin, cMyBP-C and titin are all subject to mutation, which can lead to heart failure. Despite the central importance of cardiac myosin filaments to life, their molecular structure has remained a mystery for 60 years. Here we solve the structure of the main (cMyBP-C-containing) region of the human cardiac filament using cryo-electron microscopy. The reconstruction reveals the architecture of titin and cMyBP-C and shows how myosin's motor domains (heads) form three different types of motif (providing functional flexibility), which interact with each other and with titin and cMyBP-C to dictate filament architecture and function. The packing of myosin tails in the filament backbone is also resolved. The structure suggests how cMyBP-C helps to generate the cardiac super-relaxed state; how titin and cMyBP-C may contribute to length-dependent activation; and how mutations in myosin and cMyBP-C might disturb interactions, causing disease. The reconstruction resolves past uncertainties and integrates previous data on cardiac muscle structure and function. It provides a new paradigm for interpreting structural, physiological and clinical observations, and for the design of potential therapeutic drugs. | |||||||||||||||
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 | ![]() | 21.3 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
文書・要旨 | ![]() | 3.5 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.6 MB | 表示 | |
XML形式データ | ![]() | 1 MB | 表示 | |
CIF形式データ | ![]() | 1.7 MB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 29722MC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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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: 223445.984 Da / 分子数: 78 / 由来タイプ: 天然 / 由来: (天然) ![]() #2: タンパク質 | 分子量: 21962.068 Da / 分子数: 18 / 由来タイプ: 天然 / 由来: (天然) ![]() #3: タンパク質 | 分子量: 18813.273 Da / 分子数: 18 / 由来タイプ: 天然 / 由来: (天然) ![]() #4: タンパク質 | 分子量: 119771.961 Da / 分子数: 6 / 由来タイプ: 天然 / 由来: (天然) ![]() 参照: UniProt: Q8WZ42, non-specific serine/threonine protein kinase #5: タンパク質 | 分子量: 140947.172 Da / 分子数: 3 / 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: FILAMENT / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Myosin filaments isolated from human cardiac left ventricular muscle タイプ: TISSUE / Entity ID: all / 由来: NATURAL |
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分子量 | 値: 5.9 MDa / 実験値: NO |
由来(天然) | 生物種: ![]() |
緩衝液 | pH: 6.8 |
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 |
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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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 61 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
ソフトウェア |
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EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C3 (3回回転対称) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 6.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 102581 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 |
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原子モデル構築 |
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