- EMDB-28378: Structure of the C3bB proconvertase in complex with lufaxin and f... -
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データベース: EMDB / ID: EMD-28378
タイトル
Structure of the C3bB proconvertase in complex with lufaxin and factor Xa
マップデータ
試料
複合体: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
タンパク質・ペプチド: Complement C3 beta chain
タンパク質・ペプチド: Complement C3b alpha' chain
タンパク質・ペプチド: Complement factor B
タンパク質・ペプチド: Factor X light chain
タンパク質・ペプチド: Activated factor Xa heavy chain
タンパク質・ペプチド: Lufaxin
リガンド: MAGNESIUM ION
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
キーワード
Complement / Alternative pathway / inhibitor / sand fly / IMMUNE SYSTEM
機能・相同性
機能・相同性情報
alternative-complement-pathway C3/C5 convertase / complement binding / C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / Alternative complement activation / complement-mediated synapse pruning ...alternative-complement-pathway C3/C5 convertase / complement binding / C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / Alternative complement activation / complement-mediated synapse pruning / coagulation factor Xa / positive regulation of type IIa hypersensitivity / Activation of C3 and C5 / positive regulation of lipid storage / positive regulation of phagocytosis, engulfment / complement activation, GZMK pathway / positive regulation of G protein-coupled receptor signaling pathway / symbiont cell surface / Defective factor IX causes thrombophilia / Defective cofactor function of FVIIIa variant / Defective F9 variant does not activate FX / complement-dependent cytotoxicity / positive regulation of D-glucose transmembrane transport / complement receptor mediated signaling pathway / complement activation, alternative pathway / complement activation / : / neuron remodeling / endopeptidase inhibitor activity / amyloid-beta clearance / B cell activation / complement activation, classical pathway / positive regulation of vascular endothelial growth factor production / positive regulation of TOR signaling / Transport of gamma-carboxylated protein precursors from the endoplasmic reticulum to the Golgi apparatus / : / Gamma-carboxylation of protein precursors / Removal of aminoterminal propeptides from gamma-carboxylated proteins / Purinergic signaling in leishmaniasis infection / : / Regulation of Complement cascade / Peptide ligand-binding receptors / Post-translational protein phosphorylation / response to bacterium / fatty acid metabolic process / positive regulation of protein phosphorylation / positive regulation of receptor-mediated endocytosis / phospholipid binding / Golgi lumen / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / blood coagulation / positive regulation of angiogenesis / azurophil granule lumen / toxin activity / secretory granule lumen / blood microparticle / G alpha (i) signalling events / immune response / positive regulation of cell migration / G protein-coupled receptor signaling pathway / endoplasmic reticulum lumen / inflammatory response / receptor ligand activity / serine-type endopeptidase activity / signaling receptor binding / external side of plasma membrane / calcium ion binding / Neutrophil degranulation / cell surface / signal transduction / protein-containing complex / proteolysis / : / extracellular exosome / extracellular region / plasma membrane 類似検索 - 分子機能
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
米国
引用
ジャーナル: Blood / 年: 2023 タイトル: A bispecific inhibitor of complement and coagulation blocks activation in complementopathy models via a novel mechanism. 著者: John F Andersen / Haotian Lei / Ethan C Strayer / Tapan Kanai / Van Pham / Xiang-Zuo Pan / Patricia Hessab Alvarenga / Gloria F Gerber / Oluwatoyin A Asojo / Ivo M B Francischetti / Robert A ...著者: John F Andersen / Haotian Lei / Ethan C Strayer / Tapan Kanai / Van Pham / Xiang-Zuo Pan / Patricia Hessab Alvarenga / Gloria F Gerber / Oluwatoyin A Asojo / Ivo M B Francischetti / Robert A Brodsky / Jesus G Valenzuela / José M C Ribeiro / 要旨: Inhibitors of complement and coagulation are present in the saliva of a variety of blood-feeding arthropods that transmit parasitic and viral pathogens. Here, we describe the structure and mechanism ...Inhibitors of complement and coagulation are present in the saliva of a variety of blood-feeding arthropods that transmit parasitic and viral pathogens. Here, we describe the structure and mechanism of action of the sand fly salivary protein lufaxin, which inhibits the formation of the central alternative C3 convertase (C3bBb) and inhibits coagulation factor Xa (fXa). Surface plasmon resonance experiments show that lufaxin stabilizes the binding of serine protease factor B (FB) to C3b but does not detectably bind either C3b or FB alone. The crystal structure of the inhibitor reveals a novel all β-sheet fold containing 2 domains. A structure of the lufaxin-C3bB complex obtained via cryo-electron microscopy (EM) shows that lufaxin binds via its N-terminal domain at an interface containing elements of both C3b and FB. By occupying this spot, the inhibitor locks FB into a closed conformation in which proteolytic activation of FB by FD cannot occur. C3bB-bound lufaxin binds fXa at a separate site in its C-terminal domain. In the cryo-EM structure of a C3bB-lufaxin-fXa complex, the inhibitor binds to both targets simultaneously, and lufaxin inhibits fXa through substrate-like binding of a C-terminal peptide at the active site as well as other interactions in this region. Lufaxin inhibits complement activation in ex vivo models of atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH) as well as thrombin generation in plasma, providing a rationale for the development of a bispecific inhibitor to treat complement-related diseases in which thrombosis is a prominent manifestation.
全体 : The C3 proconvertase from the alternative pathway of complement i...
全体
名称: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
要素
複合体: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
タンパク質・ペプチド: Complement C3 beta chain
タンパク質・ペプチド: Complement C3b alpha' chain
タンパク質・ペプチド: Complement factor B
タンパク質・ペプチド: Factor X light chain
タンパク質・ペプチド: Activated factor Xa heavy chain
タンパク質・ペプチド: Lufaxin
リガンド: MAGNESIUM ION
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
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超分子 #1: The C3 proconvertase from the alternative pathway of complement i...
超分子
名称: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#3, #5-#6