+データを開く
-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 | |||||||||||||||
要素 |
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キーワード | CONTRACTILE PROTEIN / cardiac / myosin / filament / complex | |||||||||||||||
機能・相同性 | 機能・相同性情報 myosin II heavy chain binding / C zone / regulation of muscle filament sliding / muscle cell fate specification / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / striated muscle myosin thick filament / sarcomerogenesis / structural molecule activity conferring elasticity / telethonin binding ...myosin II heavy chain binding / C zone / regulation of muscle filament sliding / muscle cell fate specification / regulation of slow-twitch skeletal muscle fiber contraction / regulation of the force of skeletal muscle contraction / striated muscle myosin thick filament / sarcomerogenesis / structural molecule activity conferring elasticity / telethonin binding / skeletal muscle myosin thick filament assembly / cardiac myofibril / regulation of striated muscle contraction / cardiac myofibril assembly / muscle myosin complex / muscle filament sliding / muscle alpha-actinin binding / detection of muscle stretch / transition between fast and slow fiber / regulation of the force of heart contraction / cardiac muscle tissue morphogenesis / myosin filament / adult heart development / cardiac muscle hypertrophy in response to stress / protein kinase regulator activity / positive regulation of ATP-dependent activity / cardiac muscle hypertrophy / mitotic chromosome condensation / actinin binding / Striated Muscle Contraction / myosin II complex / M band / I band / myosin complex / cardiac muscle cell development / ventricular cardiac muscle tissue morphogenesis / A band / structural constituent of muscle / sarcomere organization / microfilament motor activity / myosin binding / myofibril / heart contraction / myosin heavy chain binding / positive regulation of the force of heart contraction / skeletal muscle thin filament assembly / striated muscle thin filament / ATPase activator activity / skeletal muscle contraction / actin monomer binding / heart morphogenesis / ATP metabolic process / cardiac muscle contraction / stress fiber / striated muscle contraction / titin binding / muscle contraction / protein kinase A signaling / regulation of heart rate / sarcomere / condensed nuclear chromosome / positive regulation of protein secretion / negative regulation of cell growth / Z disc / response to calcium ion / actin filament binding / Platelet degranulation / heart development / actin binding / protein tyrosine kinase activity / protease binding / cytoskeleton / non-specific serine/threonine protein kinase / calmodulin binding / 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 / identical protein binding / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | |||||||||||||||
生物種 | Homo sapiens (ヒト) | |||||||||||||||
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 | |||||||||||||||
データ登録者 | Dutta, D. / Nguyen, V. / Padron, R. / Craig, R. | |||||||||||||||
資金援助 | 米国, 4件
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引用 | ジャーナル: Nature / 年: 2023 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: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8g4l.cif.gz | 21.3 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8g4l.ent.gz | 表示 | PDB形式 | |
PDBx/mmJSON形式 | 8g4l.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8g4l_validation.pdf.gz | 3.7 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8g4l_full_validation.pdf.gz | 3.7 MB | 表示 | |
XML形式データ | 8g4l_validation.xml.gz | 1 MB | 表示 | |
CIF形式データ | 8g4l_validation.cif.gz | 1.7 MB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/g4/8g4l ftp://data.pdbj.org/pub/pdb/validation_reports/g4/8g4l | 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-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) Homo sapiens (ヒト) / 組織: heart / 参照: UniProt: P12883 #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) Homo sapiens (ヒト) / 組織: heart / 参照: UniProt: P08590 #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) Homo sapiens (ヒト) / 組織: heart / 参照: UniProt: P10916 #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) Homo sapiens (ヒト) / 組織: heart 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) Homo sapiens (ヒト) / 組織: heart / 参照: UniProt: Q14896 |
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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 |
-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: Homo sapiens (ヒト) |
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 |
-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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
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) |
-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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