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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9j66 | |||||||||
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タイトル | Cryo-EM structure of the SARS-CoV-2 S 6P trimer in complex with the human neutralizing antibody Fab fragment CAV-C65 (local refinement) | |||||||||
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![]() | VIRAL PROTEIN / SARS-COV-2 / spike glycoprotein / neutralizing antibody / viral protein-immune system complex (local refinement) | |||||||||
機能・相同性 | ![]() Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion ...Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion / entry receptor-mediated virion attachment to host cell / Attachment and Entry / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / receptor ligand activity / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / 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: 3.55 Å | |||||||||
![]() | Jing, X. / Chen, Y. / Gong, P. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: IgA class switching enhances neutralizing potency against SARS-CoV-2 by increased antibody hinge flexibility. 著者: Mengxin Xu / Zhaoyong Zhang / Yuzhu Sun / Haoting Mai / Siqi Liu / Shuning Liu / Kexin Lv / Feiyang Yu / Yuanyuan Wang / Xinyu Yue / Jiayi Zhang / Xiaoyu Cai / Ruixin Zhao / Hongjie Lu / Lin ...著者: Mengxin Xu / Zhaoyong Zhang / Yuzhu Sun / Haoting Mai / Siqi Liu / Shuning Liu / Kexin Lv / Feiyang Yu / Yuanyuan Wang / Xinyu Yue / Jiayi Zhang / Xiaoyu Cai / Ruixin Zhao / Hongjie Lu / Lin Liu / Huanle Luo / Haiyan Zhao / Yanqun Wang / Peng Gong / Shoudeng Chen / Xuping Jing / Jincun Zhao / Yao-Qing Chen / ![]() 要旨: IgA antibodies are critical components of the mucosal immune barrier, providing essential first-line defense against viral infections. In this study, we investigated the impact of antibody class ...IgA antibodies are critical components of the mucosal immune barrier, providing essential first-line defense against viral infections. In this study, we investigated the impact of antibody class switching on neutralization efficacy by engineering recombinant antibodies of different isotypes (IgA1, IgG1) with identical variable regions from SARS-CoV-2 convalescent patients. A potent, broad-spectrum neutralizing monoclonal antibody CAV-C65 exhibited a ten-fold increase in neutralization potency upon switching from IgG1 to IgA1 monomer. Structural analysis revealed that this antibody binds to two adjacent receptor binding domains on the spike protein. Enhanced neutralization by IgA1 was attributed to the combined effects of increased affinity, unique hinge region properties, and potential cross-linking of viral particles. Inhaled CAV-C65 IgA1 demonstrated prophylactic efficacy against lethal SARS-CoV-2 infection in hACE2 mice. These findings highlight the pivotal role of IgA in antiviral immunity and inform the development of IgA-based therapeutics. | |||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 109.3 KB | 表示 | ![]() |
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PDB形式 | ![]() | 79.4 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 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 36 KB | 表示 | |
CIF形式データ | ![]() | 50.9 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 | ![]() 61167MC 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: 抗体 | 分子量: 24463.514 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() | ||
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#2: 抗体 | 分子量: 23177.666 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() | ||
#3: タンパク質 | 分子量: 21873.496 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 株: 2697049 / 遺伝子: S, 2 / 細胞株 (発現宿主): HEK293 / 発現宿主: ![]() 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: complex of the SARS-CoV-2 S 6P trimer with the human neutralizing antibody Fab fragment CAV-C65 タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
顕微鏡 | モデル: JEOL CRYO ARM 300 |
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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): 2500 nm / 最小 デフォーカス(公称値): 500 nm |
撮影 | 電子線照射量: 40 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
CTF補正 | タイプ: PHASE FLIPPING ONLY |
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3次元再構成 | 解像度: 3.55 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 579375 / 対称性のタイプ: POINT |