+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7zgj | ||||||
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タイトル | Trypanosoma brucei gambiense ISG65 in complex with human complement component C3 | ||||||
要素 |
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キーワード | IMMUNE SYSTEM (免疫系) / complement / complex | ||||||
機能・相同性 | 機能・相同性情報 oviduct epithelium development / C5L2 anaphylatoxin chemotactic receptor binding / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation / positive regulation of lipid storage / positive regulation of G protein-coupled receptor signaling pathway ...oviduct epithelium development / C5L2 anaphylatoxin chemotactic receptor binding / regulation of triglyceride biosynthetic process / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation / positive regulation of lipid storage / positive regulation of G protein-coupled receptor signaling pathway / positive regulation of phagocytosis, engulfment / complement receptor mediated signaling pathway / Activation of C3 and C5 / positive regulation of type IIa hypersensitivity / positive regulation of glucose transmembrane transport / 補体依存性細胞傷害 / complement activation, alternative pathway / 補体 / neuron remodeling / endopeptidase inhibitor activity / amyloid-beta clearance / positive regulation of vascular endothelial growth factor production / Purinergic signaling in leishmaniasis infection / complement activation, classical pathway / Peptide ligand-binding receptors / fatty acid metabolic process / Regulation of Complement cascade / response to bacterium / Post-translational protein phosphorylation / positive regulation of receptor-mediated endocytosis / positive regulation of angiogenesis / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / azurophil granule lumen / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / G alpha (i) signalling events / secretory granule lumen / blood microparticle / 免疫応答 / 炎症 / positive regulation of protein phosphorylation / G protein-coupled receptor signaling pathway / 小胞体 / signaling receptor binding / Neutrophil degranulation / 細胞膜 / シグナル伝達 / protein-containing complex / extracellular space / extracellular exosome / extracellular region / 生体膜 / 細胞膜 類似検索 - 分子機能 | ||||||
生物種 | Trypanosoma brucei gambiense (ガンビアトリパノソーマ) Homo sapiens (ヒト) | ||||||
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: 3.58 Å | ||||||
データ登録者 | Suelzen, H. / Zoll, S. | ||||||
資金援助 | チェコ, 1件
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引用 | ジャーナル: Nat Commun / 年: 2023 タイトル: Cryo-EM structures of Trypanosoma brucei gambiense ISG65 with human complement C3 and C3b and their roles in alternative pathway restriction. 著者: Hagen Sülzen / Jakub Began / Arun Dhillon / Sami Kereïche / Petr Pompach / Jitka Votrubova / Farnaz Zahedifard / Adriana Šubrtova / Marie Šafner / Martin Hubalek / Maaike Thompson / ...著者: Hagen Sülzen / Jakub Began / Arun Dhillon / Sami Kereïche / Petr Pompach / Jitka Votrubova / Farnaz Zahedifard / Adriana Šubrtova / Marie Šafner / Martin Hubalek / Maaike Thompson / Martin Zoltner / Sebastian Zoll / 要旨: African Trypanosomes have developed elaborate mechanisms to escape the adaptive immune response, but little is known about complement evasion particularly at the early stage of infection. Here we ...African Trypanosomes have developed elaborate mechanisms to escape the adaptive immune response, but little is known about complement evasion particularly at the early stage of infection. Here we show that ISG65 of the human-infective parasite Trypanosoma brucei gambiense is a receptor for human complement factor C3 and its activation fragments and that it takes over a role in selective inhibition of the alternative pathway C5 convertase and thus abrogation of the terminal pathway. No deposition of C4b, as part of the classical and lectin pathway convertases, was detected on trypanosomes. We present the cryo-electron microscopy (EM) structures of native C3 and C3b in complex with ISG65 which reveal a set of modes of complement interaction. Based on these findings, we propose a model for receptor-ligand interactions as they occur at the plasma membrane of blood-stage trypanosomes and may facilitate innate immune escape of the parasite. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 7zgj.cif.gz | 329.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7zgj.ent.gz | 249.2 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7zgj.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
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/zg/7zgj ftp://data.pdbj.org/pub/pdb/validation_reports/zg/7zgj | HTTPS FTP |
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-関連構造データ
関連構造データ | 14707MC 7zgkC 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 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 71393.320 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P01024 |
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#2: タンパク質 | 分子量: 113169.875 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P01024 |
#3: タンパク質 | 分子量: 40823.516 Da / 分子数: 1 / 由来タイプ: 組換発現 由来: (組換発現) Trypanosoma brucei gambiense (ガンビアトリパノソーマ) 株: MHOM/CI/86/DAL972 / 遺伝子: TbgDal_II1600 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: C9ZJ67 |
-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 |
-試料調製
構成要素 |
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分子量 |
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由来(天然) |
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由来(組換発現) | 生物種: Escherichia coli (大腸菌) | ||||||||||||||||||||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 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: 300 divisions/in. / グリッドのタイプ: C-flat-1.2/1.3 | ||||||||||||||||||||||||||||||
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 |
-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 FIELDBright-field microscopy / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1500 nm |
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 | 電子線照射量: 41.1 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 3.58 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 406545 / 対称性のタイプ: POINT |