+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8w4f | |||||||||
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タイトル | SARS-CoV-2 spike protein in complex with a trivalent nanobody | |||||||||
要素 |
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キーワード | VIRAL PROTEIN/IMMUNE SYSTEM / trivalent nanobody / viral neutralization / all-RBD-down spike / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex | |||||||||
機能・相同性 | 機能・相同性情報 Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / membrane fusion / receptor-mediated endocytosis of virus by host cell / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / 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 | Severe acute respiratory syndrome coronavirus 2 (ウイルス) synthetic construct (人工物) | |||||||||
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: 4.2 Å | |||||||||
Model details | MODEL GENERATED BY ROSETTA VERSION 2022.11+release.512e589 | |||||||||
データ登録者 | Jiang, X.Y. / Qian, J.Q. / Zhu, H.X. / Qin, Q. / Huang, Q. | |||||||||
資金援助 | 中国, 2件
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引用 | ジャーナル: Int J Biol Macromol / 年: 2024 タイトル: Structure-guided design of a trivalent nanobody cluster targeting SARS-CoV-2 spike protein. 著者: Xinyi Jiang / Qin Qin / Haixia Zhu / Jiaqiang Qian / Qiang Huang / 要旨: Nanobodies are natural anti-SARS-CoV-2 drug candidates. Engineering multivalent nanobodies is an effective way to improve the functional binding affinity of natural nanobodies by simultaneously ...Nanobodies are natural anti-SARS-CoV-2 drug candidates. Engineering multivalent nanobodies is an effective way to improve the functional binding affinity of natural nanobodies by simultaneously targeting multiple sites on viral proteins. However, multivalent nanobodies have usually been engineered by trial and error, and rational designs are still lacking. Here, we describe a structure-guided design of a self-assembled trivalent nanobody cluster targeting the SARS-CoV-2 spike protein. Using the nanobody Nb6 as a monovalent binder, we first selected a human-derived trimerization scaffold evaluated by molecular dynamics simulations, then selected an optimal linker according to the minimum distance between Nb6 and the trimerization scaffold, and finally successfully engineered a trivalent nanobody cluster called Tribody. Compared with the low-affinity monovalent counterpart (Nb6), Tribody showed much higher target binding affinity (K < 1 pM) and thus had a 900-fold increase in antiviral neutralization against SARS-CoV-2 pseudovirus. We determined the cryo-EM structure of the Tribody-spike complex and confirmed that all three Nb6 binders of Tribody collectively bind to the three receptor-binding domains (RBDs) of the spike and lock them in a 3-RBD-down conformation, fully consistent with our structure-guided design. This study demonstrates that synthetic nanobody clusters with human-derived self-assembled scaffolds are potential protein drugs against SARS-CoV-2 coronaviruses. | |||||||||
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 | 8w4f.cif.gz | 1.2 MB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8w4f.ent.gz | 1 MB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8w4f.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
文書・要旨 | 8w4f_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8w4f_full_validation.pdf.gz | 1.1 MB | 表示 | |
XML形式データ | 8w4f_validation.xml.gz | 109.5 KB | 表示 | |
CIF形式データ | 8w4f_validation.cif.gz | 167.3 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/w4/8w4f ftp://data.pdbj.org/pub/pdb/validation_reports/w4/8w4f | HTTPS FTP |
-関連構造データ
関連構造データ | 36904MC 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: 123893.242 Da / 分子数: 3 / 変異: R683A/R685A/F817P/A892P/A899P/A942P/R986P/V987P / 由来タイプ: 組換発現 由来: (組換発現) Severe acute respiratory syndrome coronavirus 2 (ウイルス) 遺伝子: S, 2 / 細胞株 (発現宿主): HEK293 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DTC2 #2: 抗体 | 分子量: 20878.377 Da / 分子数: 3 / 由来タイプ: 組換発現 / 詳細: a trivalent Nb6 construct / 由来: (組換発現) synthetic construct (人工物) / 発現宿主: Escherichia coli BL21(DE3) (大腸菌) / Variant (発現宿主): Rosetta |
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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: 3D ARRAY / 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 | 値: 0.48 MDa / 実験値: NO | ||||||||||||||||||||||||
由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 8 / 詳細: 20 mM Tris,150 mM NaCl | ||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.3 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil | ||||||||||||||||||||||||
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: 296.15 K |
-電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS |
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電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 200 kV / 照射モード: SPOT SCAN |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 92000 X / 最大 デフォーカス(公称値): 2400 nm / 最小 デフォーカス(公称値): 1800 nm |
撮影 | 電子線照射量: 56 e/Å2 フィルム・検出器のモデル: FEI FALCON III (4k x 4k) |
-解析
EMソフトウェア |
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 2754775 | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 262855 / 対称性のタイプ: POINT |