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基本情報
登録情報 | データベース: PDB / ID: 8ty1 | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of coagulation factor VIII bound to NB2E9 | |||||||||||||||||||||||||||||||||||||||||||||
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![]() | BLOOD CLOTTING/INHIBITOR / Coagulation / Inhibitor antibody / factor VIII / BLOOD CLOTTING-INHIBITOR complex | |||||||||||||||||||||||||||||||||||||||||||||
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-coated ER to Golgi transport vesicle / COPII-mediated vesicle transport / 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 / endoplasmic reticulum lumen / copper ion binding / extracellular space / extracellular region / plasma membrane 類似検索 - 分子機能 | |||||||||||||||||||||||||||||||||||||||||||||
生物種 | ![]() ![]() ![]() | |||||||||||||||||||||||||||||||||||||||||||||
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: 3.46 Å | |||||||||||||||||||||||||||||||||||||||||||||
![]() | Childers, K.C. / Spiegel, P.C. | |||||||||||||||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural basis for inhibition of coagulation factor VIII reveals a shared antigenic hotspot on the C1 domain. 著者: Kenneth C Childers / Ben Cowper / Jordan D Vaughan / Juliet R McGill / Omar Davulcu / Pete Lollar / Christopher B Doering / Carmen H Coxon / Paul C Spiegel / ![]() ![]() 要旨: BACKGROUND: Hemophilia A arises from dysfunctional or deficient coagulation factor (F)VIII and leads to inefficient fibrin clot formation and uncontrolled bleeding events. The development of antibody ...BACKGROUND: Hemophilia A arises from dysfunctional or deficient coagulation factor (F)VIII and leads to inefficient fibrin clot formation and uncontrolled bleeding events. The development of antibody inhibitors is a clinical complication in hemophilia A patients receiving FVIII replacement therapy. LE2E9 is an anti-C1 domain inhibitor previously isolated from a mild/moderate hemophilia A patient and disrupts FVIII interactions with von Willebrand factor and FIXa, though the intermolecular contacts that underpin LE2E9-mediated FVIII neutralization are undefined. OBJECTIVES: To determine the structure of the complex between FVIII and LE2E9 and characterize its mechanism of inhibition. 手法: FVIII was bound to the antigen binding fragment (Fab) of NB2E9, a recombinant construct of LE2E9, and its structure was determined by cryogenic electron microscopy. RESULTS: This report communicates the 3.46 Å structure of FVIII bound to NB2E9, with its epitope comprising FVIII residues S2040 to Y2043, K2065 to W2070, and R2150 to H2155. Structural analysis ...RESULTS: This report communicates the 3.46 Å structure of FVIII bound to NB2E9, with its epitope comprising FVIII residues S2040 to Y2043, K2065 to W2070, and R2150 to H2155. Structural analysis reveals that the LE2E9 epitope overlaps with portions of the epitope for 2A9, a murine-derived inhibitor, suggesting that these residues represent a shared antigenic region on the C1 domain between FVIII mice and hemophilia A patients. Furthermore, the FVIII:NB2E9 structure elucidates the orientation of the LE2E9 glycan, illustrating how the glycan sterically blocks interactions between the FVIII C1 domain and the von Willebrand factor D' domain. A putative model of the FVIIIa:FIXa complex suggests potential clashing between the NB2E9 glycan and FIXa light chain. CONCLUSION: These results describe an antigenic "hotspot" on the FVIII C1 domain and provide a structural basis for engineering FVIII replacement therapeutics with reduced antigenicity. | |||||||||||||||||||||||||||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 356.1 KB | 表示 | ![]() |
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PDB形式 | ![]() | 277.2 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.4 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.5 MB | 表示 | |
XML形式データ | ![]() | 68 KB | 表示 | |
CIF形式データ | ![]() | 99 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 41710MC 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 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 168287.047 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() ![]() 遺伝子: F8, F8, F8C, F8, CF8 発現宿主: ![]() ![]() 参照: UniProt: P12263, UniProt: P00451 | ||||
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#2: 抗体 | 分子量: 23513.164 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() | ||||
#3: 抗体 | 分子量: 25373.285 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() | ||||
#4: 多糖 | 研究の焦点であるリガンドがあるか | N | Has protein modification | Y | |
-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: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: Coagulation factor VIII bound to NB2E9 / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: MULTIPLE SOURCES | |||||||||||||||
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分子量 | 実験値: NO | |||||||||||||||
由来(天然) | 生物種: ![]() | |||||||||||||||
由来(組換発現) | 生物種: ![]() ![]() | |||||||||||||||
緩衝液 | pH: 7.4 / 詳細: 20 mM HEPES (pH 7.4) and 150 mM NaCl | |||||||||||||||
緩衝液成分 |
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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 | グリッドのサイズ: 400 divisions/in. | |||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2700 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
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解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.46 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 94935 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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