+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6bih | |||||||||||||||||||||
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タイトル | The Structure of the Actin-Smooth Muscle Myosin Motor Domain Complex in the Rigor State | |||||||||||||||||||||
要素 |
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キーワード | MOTOR PROTEIN / ADP-F-actin / apo-myosin / helix muscle | |||||||||||||||||||||
機能・相同性 | 機能・相同性情報 myofibril assembly / elastic fiber assembly / myosin light chain binding / skeletal muscle myosin thick filament assembly / myosin II binding / muscle myosin complex / myosin filament / actomyosin structure organization / myosin II complex / cardiac muscle cell development ...myofibril assembly / elastic fiber assembly / myosin light chain binding / skeletal muscle myosin thick filament assembly / myosin II binding / muscle myosin complex / myosin filament / actomyosin structure organization / myosin II complex / cardiac muscle cell development / structural constituent of muscle / cytoskeletal motor activator activity / microfilament motor activity / myofibril / 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 / smooth muscle contraction / skeletal muscle fiber development / stress fiber / titin binding / actin filament polymerization / filopodium / actin filament / ADP binding / 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 / actin filament binding / lamellipodium / actin binding / cell body / calmodulin binding / 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 | Gallus gallus (ニワトリ) 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 Å | |||||||||||||||||||||
データ登録者 | Taylor, K.A. / Banerjee, C. / Hu, Z. | |||||||||||||||||||||
資金援助 | 米国, 6件
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引用 | ジャーナル: J Struct Biol / 年: 2017 タイトル: The structure of the actin-smooth muscle myosin motor domain complex in the rigor state. 著者: Chaity Banerjee / Zhongjun Hu / Zhong Huang / J Anthony Warrington / Dianne W Taylor / Kathleen M Trybus / Susan Lowey / Kenneth A Taylor / 要旨: Myosin-based motility utilizes catalysis of ATP to drive the relative sliding of F-actin and myosin. The earliest detailed model based on cryo-electron microscopy (cryoEM) and X-ray crystallography ...Myosin-based motility utilizes catalysis of ATP to drive the relative sliding of F-actin and myosin. The earliest detailed model based on cryo-electron microscopy (cryoEM) and X-ray crystallography postulated that higher actin affinity and lever arm movement were coupled to closure of a feature of the myosin head dubbed the actin-binding cleft. Several studies since then using crystallography of myosin-V and cryoEM structures of F-actin bound myosin-I, -II and -V have provided details of this model. The smooth muscle myosin II interaction with F-actin may differ from those for striated and non-muscle myosin II due in part to different lengths of important surface loops. Here we report a ∼6 Å resolution reconstruction of F-actin decorated with the nucleotide-free recombinant smooth muscle myosin-II motor domain (MD) from images recorded using a direct electron detector. Resolution is highest for F-actin and the actin-myosin interface (3.5-4 Å) and lowest (∼6-7 Å) for those parts of the MD at the highest radius. Atomic models built into the F-actin density are quite comparable to those previously reported for rabbit muscle actin and show density from the bound ADP. The atomic model of the MD, is quite similar to a recently published structure of vertebrate non-muscle myosin II bound to F-actin and a crystal structure of nucleotide free myosin-V. Larger differences are observed when compared to the cryoEM structure of F-actin decorated with rabbit skeletal muscle myosin subfragment 1. The differences suggest less closure of the 50 kDa domain in the actin bound skeletal muscle myosin structure. | |||||||||||||||||||||
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 | 6bih.cif.gz | 373.9 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6bih.ent.gz | 297.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6bih.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 | 6bih_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6bih_full_validation.pdf.gz | 1.1 MB | 表示 | |
XML形式データ | 6bih_validation.xml.gz | 41.1 KB | 表示 | |
CIF形式データ | 6bih_validation.cif.gz | 62.4 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/bi/6bih ftp://data.pdbj.org/pub/pdb/validation_reports/bi/6bih | 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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1 |
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2 |
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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: 7 / Rise per n subunits: 28.18685 Å / Rotation per n subunits: -166.77931 °) |
-要素
#1: タンパク質 | 分子量: 91343.227 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Gallus gallus (ニワトリ) / 組織: skeletal muscle / 遺伝子: MYH11 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P10587 |
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#2: タンパク質 | 分子量: 42096.953 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 |
#3: 化合物 | ChemComp-ADP / |
#4: 化合物 | ChemComp-MG / |
-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 |
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分子量 | 実験値: NO | ||||||||||||||||||||||||
由来(天然) |
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由来(組換発現) | 生物種: Spodoptera frugiperda (ツマジロクサヨトウ) | ||||||||||||||||||||||||
緩衝液 | pH: 7.4 詳細: actin buffer: 10 mM imidazole, 10 mM KCl, 1.0 mM MgCl2, 1.0 mM EGTA, 0.5 mM DTT, pH 7.4, myosin buffer: 10 mM imidazole, 10 mM KCl, 1.0 mM MgCl2, 1.0 mM EGTA, 0.5 mM DTT, pH 7.0 | ||||||||||||||||||||||||
試料 | 濃度: 0.1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/1 | ||||||||||||||||||||||||
急速凍結 | 装置: GATAN CRYOPLUNGE 3 / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 276 K 詳細: Some specimens were frozen manually using a homemade plunger. |
-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): 5000 nm / 最小 デフォーカス(公称値): 2200 nm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 平均露光時間: 1.34 sec. / 電子線照射量: 60 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: DIRECT ELECTRON DE-20 (5k x 3k) 実像数: 4000 / 詳細: Only 1417 of the 4000 recorded images were used. |
画像スキャン | 動画フレーム数/画像: 43 / 利用したフレーム数/画像: 1-43 |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING ONLY | ||||||||||||||||||||||||||||||||||||
らせん対称 | 回転角度/サブユニット: -166.77931 ° / 軸方向距離/サブユニット: 28.18685 Å / らせん対称軸の対称性: C1 | ||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 346395 詳細: Each "particle" consisted of a filament segment masked to a length of 21.0 nm, or slightly more than 7 actin subunits with 2.76 nm separation. Adjacent filament segments overlapped by about 6 ...詳細: Each "particle" consisted of a filament segment masked to a length of 21.0 nm, or slightly more than 7 actin subunits with 2.76 nm separation. Adjacent filament segments overlapped by about 6 subunit repeats (approximately 84% overlap). | ||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 6 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 85000 / アルゴリズム: EXACT BACK PROJECTION / クラス平均像の数: 4 / 対称性のタイプ: HELICAL | ||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 390.86 / プロトコル: FLEXIBLE FIT / 空間: REAL |