+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3mfp | ||||||
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タイトル | Atomic model of F-actin based on a 6.6 angstrom resolution cryoEM map | ||||||
要素 | Actin, alpha skeletal muscle | ||||||
キーワード | CONTRACTILE PROTEIN / helical filament / muscle protein | ||||||
機能・相同性 | 機能・相同性情報 cytoskeletal motor activator activity / tropomyosin binding / myosin heavy chain binding / mesenchyme migration / troponin I binding / filamentous actin / actin filament bundle / skeletal muscle thin filament assembly / actin filament bundle assembly / striated muscle thin filament ...cytoskeletal motor activator activity / tropomyosin binding / myosin heavy chain binding / mesenchyme migration / troponin I binding / filamentous actin / actin filament bundle / skeletal muscle thin filament assembly / actin filament bundle assembly / striated muscle thin filament / skeletal muscle myofibril / actin monomer binding / skeletal muscle fiber development / stress fiber / titin binding / actin filament polymerization / filopodium / actin filament / 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 / calcium-dependent protein binding / lamellipodium / cell body / hydrolase activity / protein domain specific binding / calcium ion binding / positive regulation of gene expression / magnesium ion binding / ATP binding / identical protein binding / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Oryctolagus cuniculus (ウサギ) | ||||||
手法 | 電子顕微鏡法 / らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 6.6 Å | ||||||
データ登録者 | Fujii, T. / Iwane, A.H. / Yanagida, T. / Namba, K. | ||||||
引用 | ジャーナル: Nature / 年: 2010 タイトル: Direct visualization of secondary structures of F-actin by electron cryomicroscopy. 著者: Takashi Fujii / Atsuko H Iwane / Toshio Yanagida / Keiichi Namba / 要旨: F-actin is a helical assembly of actin, which is a component of muscle fibres essential for contraction and has a crucial role in numerous cellular processes, such as the formation of lamellipodia ...F-actin is a helical assembly of actin, which is a component of muscle fibres essential for contraction and has a crucial role in numerous cellular processes, such as the formation of lamellipodia and filopodia, as the most abundant component and regulator of cytoskeletons by dynamic assembly and disassembly (from G-actin to F-actin and vice versa). Actin is a ubiquitous protein and is involved in important biological functions, but the definitive high-resolution structure of F-actin remains unknown. Although a recent atomic model well reproduced X-ray fibre diffraction intensity data from a highly oriented liquid-crystalline sol specimen, its refinement without experimental phase information has certain limitations. Direct visualization of the structure by electron cryomicroscopy, however, has been difficult because it is relatively thin and flexible. Here we report the F-actin structure at 6.6 Å resolution, made obtainable by recent advances in electron cryomicroscopy. The density map clearly resolves all the secondary structures of G-actin, such as α-helices, β-structures and loops, and makes unambiguous modelling and refinement possible. Complex domain motions that open the nucleotide-binding pocket on F-actin formation, specific D-loop and terminal conformations, and relatively tight axial but markedly loose interprotofilament interactions hydrophilic in nature are revealed in the F-actin model, and all seem to be important for dynamic functions of actin. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 3mfp.cif.gz | 80.1 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb3mfp.ent.gz | 63.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3mfp.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 | 3mfp_validation.pdf.gz | 823.8 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 3mfp_full_validation.pdf.gz | 850.1 KB | 表示 | |
XML形式データ | 3mfp_validation.xml.gz | 22 KB | 表示 | |
CIF形式データ | 3mfp_validation.cif.gz | 30.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/mf/3mfp ftp://data.pdbj.org/pub/pdb/validation_reports/mf/3mfp | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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対称性 | らせん対称: (回転対称性: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 5 / Rise per n subunits: 27.6 Å / Rotation per n subunits: -166.656 °) |
-要素
#1: タンパク質 | 分子量: 41875.633 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Oryctolagus cuniculus (ウサギ) / 参照: UniProt: P68135 |
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#2: 化合物 | ChemComp-ADP / |
-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: らせん対称体再構成法 |
-試料調製
構成要素 | 名称: F-actin / タイプ: COMPLEX |
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緩衝液 | pH: 7.5 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK I / 凍結剤: ETHANE |
-電子顕微鏡撮影
顕微鏡 | モデル: JEOL 3200FSC / 日付: 2009年3月21日 |
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電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 100000 X / 倍率(補正後): 172414 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1000 nm / Cs: 1.6 mm |
試料ホルダ | 温度: 50 K |
撮影 | 電子線照射量: 20 e/Å2 フィルム・検出器のモデル: TVIPS TEMCAM-F415 (4k x 4k) 詳細: 16 mega pixels slow-scan CCD camera |
-解析
EMソフトウェア |
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3次元再構成 | 解像度: 6.6 Å / ピクセルサイズ(実測値): 1.742 Å / 対称性のタイプ: HELICAL | ||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL / Target criteria: Cross-correlation coefficient / 詳細: REFINEMENT PROTOCOL--flexible fitting | ||||||||||||
原子モデル構築 | PDB-ID: 1J6Z | ||||||||||||
精密化ステップ | サイクル: LAST
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