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基本情報
登録情報 | データベース: EMDB / ID: EMD-5540 | |||||||||
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タイトル | 3D membrane-bound structure of FVIII bound to single lipid bilayer nanotubes | |||||||||
![]() | Helical reconstruction of membrane-bound Factor vIII light chain bound to single bilayer lipid nanotubes | |||||||||
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![]() | Coagulation factor VIII / Cryo-electron microscopy / Membrane-bound organization / Molecular modeling / Protein-lipid interactions / Hemophilia A | |||||||||
機能・相同性 | ![]() Defective F8 accelerates dissociation of the A2 domain / Defective F8 binding to the cell membrane / Defective F8 secretion / Defective F8 sulfation at Y1699 / Gamma carboxylation, hypusinylation, hydroxylation, and arylsulfatase activation / Defective F8 binding to von Willebrand factor / blood coagulation, intrinsic pathway / Cargo concentration in the ER / Defective factor IX causes thrombophilia / Defective cofactor function of FVIIIa variant ...Defective F8 accelerates dissociation of the A2 domain / Defective F8 binding to the cell membrane / Defective F8 secretion / Defective F8 sulfation at Y1699 / Gamma carboxylation, hypusinylation, hydroxylation, and arylsulfatase activation / Defective F8 binding to von Willebrand factor / blood coagulation, intrinsic pathway / Cargo concentration in the ER / Defective factor IX causes thrombophilia / Defective cofactor function of FVIIIa variant / Defective F9 variant does not activate FX / COPII-mediated vesicle transport / COPII-coated ER to Golgi transport vesicle / Defective F8 cleavage by thrombin / Common Pathway of Fibrin Clot Formation / Intrinsic Pathway of Fibrin Clot Formation / endoplasmic reticulum-Golgi intermediate compartment membrane / platelet alpha granule lumen / acute-phase response / Golgi lumen / blood coagulation / Platelet degranulation / oxidoreductase activity / copper ion binding / endoplasmic reticulum lumen / extracellular space / extracellular region / plasma membrane 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | らせん対称体再構成法 / クライオ電子顕微鏡法 / 解像度: 15.0 Å | |||||||||
![]() | Stoilova-McPhie S / Lynch GC / Ludtke S / Pettitt BM | |||||||||
![]() | ![]() タイトル: Domain organization of membrane-bound factor VIII. 著者: Svetla Stoilova-McPhie / Gillian C Lynch / Steven Ludtke / B Montgomery Pettitt / ![]() 要旨: Factor VIII (FVIII) is the blood coagulation protein which when defective or deficient causes for hemophilia A, a severe hereditary bleeding disorder. Activated FVIII (FVIIIa) is the cofactor to the ...Factor VIII (FVIII) is the blood coagulation protein which when defective or deficient causes for hemophilia A, a severe hereditary bleeding disorder. Activated FVIII (FVIIIa) is the cofactor to the serine protease factor IXa (FIXa) within the membrane-bound Tenase complex, responsible for amplifying its proteolytic activity more than 100,000 times, necessary for normal clot formation. FVIII is composed of two noncovalently linked peptide chains: a light chain (LC) holding the membrane interaction sites and a heavy chain (HC) holding the main FIXa interaction sites. The interplay between the light and heavy chains (HCs) in the membrane-bound state is critical for the biological efficiency of FVIII. Here, we present our cryo-electron microscopy (EM) and structure analysis studies of human FVIII-LC, when helically assembled onto negatively charged single lipid bilayer nanotubes. The resolved FVIII-LC membrane-bound structure supports aspects of our previously proposed FVIII structure from membrane-bound two-dimensional (2D) crystals, such as only the C2 domain interacts directly with the membrane. The LC is oriented differently in the FVIII membrane-bound helical and 2D crystal structures based on EM data, and the existing X-ray structures. This flexibility of the FVIII-LC domain organization in different states is discussed in the light of the FVIIIa-FIXa complex assembly and function. | |||||||||
履歴 |
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構造の表示
ムービー |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
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マップデータ | ![]() | 48.5 MB | ![]() | |
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ヘッダ (付随情報) | ![]() ![]() | 11.6 KB 11.6 KB | 表示 表示 | ![]() |
画像 | ![]() | 91.3 KB | ||
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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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | Helical reconstruction of membrane-bound Factor vIII light chain bound to single bilayer lipid nanotubes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 3 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : Membrane-bound structure of human Factor VIII light chain helical...
全体 | 名称: Membrane-bound structure of human Factor VIII light chain helically organized onto single bilayer lipid nanotubes |
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要素 |
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-超分子 #1000: Membrane-bound structure of human Factor VIII light chain helical...
超分子 | 名称: Membrane-bound structure of human Factor VIII light chain helically organized onto single bilayer lipid nanotubes タイプ: sample / ID: 1000 / 集合状態: 7.5 molecules per 57 Angstrom rise / Number unique components: 96 |
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分子量 | 実験値: 89 KDa / 理論値: 90 KDa / 手法: Gel electrophoresis |
-分子 #1: blood coagulation Factor VIII light chain
分子 | 名称: blood coagulation Factor VIII light chain / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Hemophilia factor light chain A / コピー数: 96 / 集合状態: helical / 組換発現: Yes |
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由来(天然) | 生物種: ![]() |
分子量 | 実験値: 89 KDa / 理論値: 90 KDa |
組換発現 | 生物種: ![]() ![]() 組換細胞: CHO |
配列 | UniProtKB: Coagulation factor VIII |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | らせん対称体再構成法 |
試料の集合状態 | helical array |
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試料調製
濃度 | 1 mg/mL |
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緩衝液 | pH: 7.4 / 詳細: 20 mM Tris-HCl 150 mM NaCl, 20 mM EDTA |
グリッド | 詳細: 300 mesh R2x2 Quantifoil grids |
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 106 K / 装置: FEI VITROBOT MARK III / 手法: Blot for 4.5 seconds before plunging |
詳細 | The protein was mixed in 1:1 w/w ratio with lipid nanotubes solution |
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電子顕微鏡法
顕微鏡 | JEOL 2010F |
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温度 | 最低: 90 K / 最高: 100 K / 平均: 99 K |
アライメント法 | Legacy - 非点収差: corrected at 400,000 times magnification |
日付 | 2009年7月7日 |
撮影 | カテゴリ: CCD フィルム・検出器のモデル: GATAN ULTRASCAN 4000 (4k x 4k) デジタル化 - サンプリング間隔: 15 µm / 実像数: 69 / 平均電子線量: 16 e/Å2 / 詳細: Each image was acquired for 1 second. |
電子線 | 加速電圧: 200 kV / 電子線源: ![]() |
電子光学系 | 倍率(補正後): 52000 / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 2.0 mm / 最大 デフォーカス(公称値): -4.4 µm / 最小 デフォーカス(公称値): -0.7 µm / 倍率(公称値): 52000 |
試料ステージ | 試料ホルダーモデル: GATAN LIQUID NITROGEN |
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画像解析
詳細 | The 2D analysis was performed with EMAN2 and the helical reconstruction with the IHRSR algorithm |
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最終 再構成 | 想定した対称性 - らせんパラメータ - Δz: 7.6 Å 想定した対称性 - らせんパラメータ - ΔΦ: 0.5 ° アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 15.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: EMAN2, IHRSR 詳細: The final 3D reconstructions was calculated from a set of 2043 helical segments cut off from the selected helical tubes at 256 x 256 pixels with 10% overlap. |
CTF補正 | 詳細: EMAN2, only phase correction |
-原子モデル構築 1
初期モデル | PDB ID: Chain - Chain ID: B |
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ソフトウェア | 名称: ![]() |
詳細 | Protocol: fit in map |
精密化 | 空間: REAL / 当てはまり具合の基準: optimal fit |