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データを開く
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基本情報
登録情報 | ![]() | |||||||||||||||||||||
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タイトル | In situ human cardiac thick filament in the relaxed state | |||||||||||||||||||||
![]() | Human cardiac thick filament in the relaxed state | |||||||||||||||||||||
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![]() | myosin / cMyBP-C / titin / STRUCTURAL PROTEIN | |||||||||||||||||||||
生物種 | ![]() | |||||||||||||||||||||
手法 | サブトモグラム平均法 / クライオ電子顕微鏡法 / 解像度: 16.5 Å | |||||||||||||||||||||
![]() | Chen L / Liu J / Rastegarpouyani H / Janssen PML / Pinto JR / Taylor KA | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of mavacamten-free human cardiac thick filaments within the sarcomere by cryoelectron tomography. 著者: Liang Chen / Jun Liu / Hosna Rastegarpouyani / Paul M L Janssen / Jose R Pinto / Kenneth A Taylor / ![]() 要旨: Heart muscle has the unique property that it can never rest; all cardiomyocytes contract with each heartbeat which requires a complex control mechanism to regulate cardiac output to physiological ...Heart muscle has the unique property that it can never rest; all cardiomyocytes contract with each heartbeat which requires a complex control mechanism to regulate cardiac output to physiological requirements. Changes in calcium concentration regulate the thin filament activation. A separate but linked mechanism regulates the thick filament activation, which frees sufficient myosin heads to bind the thin filament, thereby producing the required force. Thick filaments contain additional nonmyosin proteins, myosin-binding protein C and titin, the latter being the protein that transmits applied tension to the thick filament. How these three proteins interact to control thick filament activation is poorly understood. Here, we show using 3-D image reconstruction of frozen-hydrated human cardiac muscle myofibrils lacking exogenous drugs that the thick filament is structured to provide three levels of myosin activation corresponding to the three crowns of myosin heads in each 429Å repeat. In one crown, the myosin heads are almost completely activated and disordered. In another crown, many myosin heads are inactive, ordered into a structure called the interacting heads motif. At the third crown, the myosin heads are ordered into the interacting heads motif, but the stability of that motif is affected by myosin-binding protein C. We think that this hierarchy of control explains many of the effects of length-dependent activation as well as stretch activation in cardiac muscle control. | |||||||||||||||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
マップデータ | ![]() | 22.3 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 32.8 KB 32.8 KB | 表示 表示 | ![]() |
FSC (解像度算出) | ![]() | 6.9 KB | 表示 | ![]() |
画像 | ![]() | 55.2 KB | ||
Filedesc metadata | ![]() | 4.9 KB | ||
その他 | ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | 362.6 KB 313.3 KB 311.2 KB 50.4 MB 50 MB 53 MB 25 MB 11.8 MB 16.4 MB 25.1 MB 25.1 MB | ||
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-検証レポート
文書・要旨 | ![]() | 931 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 930.6 KB | 表示 | |
XML形式データ | ![]() | 13.7 KB | 表示 | |
CIF形式データ | ![]() | 17.8 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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マップ
ファイル | ![]() | ||||||||||||||||||||
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注釈 | Human cardiac thick filament in the relaxed state | ||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 4.2368 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
+追加マップ: Curved layer composed of five human cardiac myosin II tail of IHM-C.
+追加マップ: Curved layer composed of five human cardiac myosin II tail of IHM-D.
+追加マップ: Curved layer composed of five human cardiac myosin II tail of IHM-S.
+追加マップ: Human cardiac myosin II tail of IHM-D segmented...
+追加マップ: Human cardiac myosin II tail of IHM-S segmented...
+追加マップ: Human cardiac myosin II tail of IHM-C segmented...
+追加マップ: cMyBP-C domains C8, C9, C10
+追加マップ: Eleven domains of C-zone titin-C
+追加マップ: Eleven domains of C-zone titin-M
+ハーフマップ: Human cardiac thick filament in the relaxed state even half map
+ハーフマップ: Human cardiac thick filament in the relaxed state odd half map
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試料の構成要素
-全体 : In situ human cardiac thick filament in the relaxed state
全体 | 名称: In situ human cardiac thick filament in the relaxed state |
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要素 |
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-超分子 #1: In situ human cardiac thick filament in the relaxed state
超分子 | 名称: In situ human cardiac thick filament in the relaxed state タイプ: complex / ID: 1 / 親要素: 0 |
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由来(天然) | 生物種: ![]() |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | サブトモグラム平均法 |
試料の集合状態 | tissue |
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試料調製
緩衝液 | pH: 6.8 |
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凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
顕微鏡 | TFS KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 1.5 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 6.0 µm / 最小 デフォーカス(公称値): 6.0 µm |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |