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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: 9ugo | ||||||||||||||||||||||||||||||
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| タイトル | Cryo-EM structure of the HBsAg dimer and Complex with Fab | ||||||||||||||||||||||||||||||
要素 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / HBV antigen / dimer / Fab / complex / VIRAL PROTEIN-IMMUNE SYSTEM complex | ||||||||||||||||||||||||||||||
| 機能・相同性 | Large envelope protein S / Major surface antigen from hepadnavirus / membrane fusion involved in viral entry into host cell / symbiont entry into host cell / virion attachment to host cell / virion membrane / Middle S protein 機能・相同性情報 | ||||||||||||||||||||||||||||||
| 生物種 | Homo sapiens (ヒト) hepatitis B virus genotype A (ウイルス) | ||||||||||||||||||||||||||||||
| 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: 4 Å | ||||||||||||||||||||||||||||||
データ登録者 | Liu, Y. / Liao, M. / Liu, Z. / Ju, B. / Zhang, Z. | ||||||||||||||||||||||||||||||
| 資金援助 | 1件
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引用 | ジャーナル: Gut / 年: 2026タイトル: Characterisation of plasmablast-derived HBsAg-specific antibody and its structural basis for binding to native HBsAg dimer. 著者: Bin Ju / Zhouqing Liu / Hu Yan / Yong Liu / Lu Zhang / Xiangyang Ge / Xin Wang / Zhu Si / Bing Zhou / Qing Fan / Miao Wang / Yuxiao Li / Wenlong Lai / Jianhui Gan / Haiyan Wang / Juanjuan ...著者: Bin Ju / Zhouqing Liu / Hu Yan / Yong Liu / Lu Zhang / Xiangyang Ge / Xin Wang / Zhu Si / Bing Zhou / Qing Fan / Miao Wang / Yuxiao Li / Wenlong Lai / Jianhui Gan / Haiyan Wang / Juanjuan Zhao / Yuchen Xia / Maofu Liao / Zheng Zhang / ![]() 要旨: BACKGROUND: Plasmablast-derived HBV surface antigen (HBsAg)-specific monoclonal antibody (mAb) and structural basis for binding to native HBsAg are poorly known. OBJECTIVE: We aimed to identify plasmablast-derived HBsAg-specific mAbs, evaluate their antiviral activities and resolve their structure for binding to native HBsAg. DESIGN: A previously vaccinated volunteer was enrolled in this study, who was boosted with a dose of recombinant hepatitis B vaccine and donated the blood sample. Activated plasmablasts were sorted ...DESIGN: A previously vaccinated volunteer was enrolled in this study, who was boosted with a dose of recombinant hepatitis B vaccine and donated the blood sample. Activated plasmablasts were sorted from fresh peripheral blood mononuclear cells and mAbs were expressed. Their gene features, cross-genotypic binding activities and antiviral functions in vitro and in vivo were comprehensively analysed. The cryo-electron microscopy (cryo-EM) was used to determine the structure of representative mAb bound to the native HBsAg. RESULTS: In this study, we cloned a series of HBsAg-specific mAbs directly from clonally expanded plasmablasts from a vaccinated individual. Most of the mAbs displayed cross-reactivities of binding ...RESULTS: In this study, we cloned a series of HBsAg-specific mAbs directly from clonally expanded plasmablasts from a vaccinated individual. Most of the mAbs displayed cross-reactivities of binding to different genotype HBsAg proteins and antiviral functions such as neutralisation and antibody-dependent cellular phagocytosis. These human anti-HBsAg mAbs, especially SY-4-class and SY-23-class, could be good candidates for antibody drugs. The cryo-EM structure of SY-23 bound to the dimeric HBsAg was determined, revealing its binding mechanism and unprecedented structural detail of the major antigenic loop (AGL) of HBsAg. CONCLUSION: Overall, our work has uncovered the diverse gene features and varied anti-HBV activities of plasmablast-derived mAbs, providing a series of antibody drug candidates and the long-sought- ...CONCLUSION: Overall, our work has uncovered the diverse gene features and varied anti-HBV activities of plasmablast-derived mAbs, providing a series of antibody drug candidates and the long-sought-after atomic model of AGL has paved the way for a wholistic characterisation of the AGL's dynamic conformation during HBV infection and immune response. | ||||||||||||||||||||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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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 | 9ugo.cif.gz | 184.9 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9ugo.ent.gz | 147.9 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9ugo.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/ug/9ugo ftp://data.pdbj.org/pub/pdb/validation_reports/ug/9ugo | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 64142MC 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 F&H 検索 |
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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: 23425.979 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Homo sapiens (ヒト)#2: 抗体 | 分子量: 24121.160 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 発現宿主: Homo sapiens (ヒト)#3: タンパク質 | 分子量: 11008.200 Da / 分子数: 2 / 由来タイプ: 組換発現 詳細: The sequence of organism hepatitis B virus genotype A is not available during the biocuration, replaced by B8QJB4 temporarily. 由来: (組換発現) hepatitis B virus genotype A (ウイルス)発現宿主: Yeast centromeric expression vector p416CYC (その他) 参照: UniProt: B8QJB4 Has protein modification | Y | |
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-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 HBsAg dimer with Fab / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT | ||||||||||||
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| 由来(天然) |
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| 由来(組換発現) |
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| 緩衝液 | pH: 7.5 | ||||||||||||
| 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
| 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: 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 FIELD / 最大 デフォーカス(公称値): 2000 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: GATAN K3 (6k x 4k) |
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解析
| EMソフトウェア | 名称: PHENIX / バージョン: 1.18.2_3874: / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 53213 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 拘束条件 |
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ムービー
コントローラー
万見について




Homo sapiens (ヒト)
hepatitis B virus genotype A (ウイルス)
引用

PDBj



FIELD EMISSION GUN