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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: 8cwk | ||||||
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タイトル | Fab arm of antibodies 4G1-C2 and 10G4 bound to CoV-2 receptor binding domain (RBD) | ||||||
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![]() | IMMUNE SYSTEM / antibody / CoV-2 / receptor binding domain / class 5 epitope | ||||||
機能・相同性 | ![]() Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression 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 / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / membrane fusion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / Attachment and Entry / 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 / extracellular region / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Langley, D.B. / Christ, D. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Affinity maturation endows potent activity onto class 6 SARS-CoV-2 broadly neutralizing antibodies. 著者: Ohan Mazigi / David B Langley / Jake Y Henry / Deborah L Burnett / Meghna Sobti / Gregory J Walker / Romain Rouet / Harikrishnan Balachandran / Helen Lenthall / Jennifer Jackson / Stephanie ...著者: Ohan Mazigi / David B Langley / Jake Y Henry / Deborah L Burnett / Meghna Sobti / Gregory J Walker / Romain Rouet / Harikrishnan Balachandran / Helen Lenthall / Jennifer Jackson / Stephanie Ubiparipovic / Peter Schofield / Simon H J Brown / Sebastian R Schulz / Markus Hoffmann / Stefan Pöhlmann / Jeffrey Post / Marianne Martinello / Golo Ahlenstiel / Anthony Kelleher / William D Rawlinson / Stuart G Turville / Rowena A Bull / Alastair G Stewart / Hans-Martin Jäck / Christopher C Goodnow / Daniel Christ / ![]() ![]() 要旨: The emergence of SARS-CoV-2 variants of concern (VOCs) has greatly diminished the neutralizing activity of previously FDA-approved monoclonal antibodies (mAbs), including that of antibody cocktails ...The emergence of SARS-CoV-2 variants of concern (VOCs) has greatly diminished the neutralizing activity of previously FDA-approved monoclonal antibodies (mAbs), including that of antibody cocktails and of first-generation broadly neutralizing antibodies such as S309 (Sotrovimab). In contrast, antibodies targeting cryptic conformational epitopes of the receptor binding domain (RBD) have demonstrated broad activity against emerging variants, but exert only moderate neutralizing activity, which has so far hindered clinical development. Here, we utilize in vitro display technology to identify and affinity-mature antibodies targeting the cryptic class 6 epitope, accessible only in the "up" conformation of the SARS-CoV-2 spike trimer. Increasing antibody affinity into the low picomolar range endowed potent neutralization of VOCs and protection of hACE2 mice from viral challenge. Cryoelectron microscopy and crystal structures of two affinity-matured antibodies (4C12-B12 and 4G1-C2) in complex with RBD highlighted binding modes and epitopes distal from mutational hotspots commonly overserved in VOCs, providing direct structural insights into the observed mutational resistance. Moreover, we further demonstrate that antibodies targeting the class 6 epitope, rather than being an artifact of in vitro selection, are common in the IgG1 memory B cell repertoire of convalescent patients and can be induced in human antibody V-gene transgenic mice through immunization. Our results highlight the importance of very high (picomolar) affinity in the development of neutralizing antibodies and vaccines and suggest an affinity threshold in the provision of broad and long-lasting immunity against SARS-CoV-2. | ||||||
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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 | ![]() | 427.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 346.6 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 | ![]() | 493.3 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 499.5 KB | 表示 | |
XML形式データ | ![]() | 39.1 KB | 表示 | |
CIF形式データ | ![]() | 54.7 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 | ![]() 8cwiC ![]() 8cwjC 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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単位格子 |
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要素
-抗体 , 4種, 4分子 HLAB
#1: 抗体 | 分子量: 24475.314 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() |
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#2: 抗体 | 分子量: 23591.232 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() |
#3: 抗体 | 分子量: 24809.555 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() |
#4: 抗体 | 分子量: 23614.150 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: Q6GMX0 |
-タンパク質 / 糖 , 2種, 3分子 C

#5: タンパク質 | 分子量: 22975.688 Da / 分子数: 1 / Fragment: receptor binding domain (RBD) / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: S, 2 / 細胞株 (発現宿主): ExpiCHO 発現宿主: ![]() ![]() 参照: UniProt: P0DTC2 |
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#7: 糖 |
-非ポリマー , 2種, 183分子 


#6: 化合物 | ChemComp-GOL / #8: 水 | ChemComp-HOH / | |
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-詳細
研究の焦点であるリガンドがあるか | N |
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Has protein modification | Y |
-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 | マシュー密度: 3.27 Å3/Da / 溶媒含有率: 62.42 % |
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結晶化 | 温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 詳細: Equal volume (2 uL) of protein solution (approx 5 mg/mL, in 25 mM Tris (pH 8.0), 200 mM NaCl) was mixed with an equal volume of well solution comprising 200 mM sodium citrate, 100 mM Bis-Tris- ...詳細: Equal volume (2 uL) of protein solution (approx 5 mg/mL, in 25 mM Tris (pH 8.0), 200 mM NaCl) was mixed with an equal volume of well solution comprising 200 mM sodium citrate, 100 mM Bis-Tris-Propane (pH 7.4), 18% PEG3350). For cryoprotection the crystal was swum briefly (5-10 sec) in well solution doped with glycerol to a final concentration of ~25%. |
-データ収集
回折 | 平均測定温度: 100 K / Serial crystal experiment: N | |||||||||||||||||||||||||||
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放射光源 | 由来: ![]() ![]() ![]() | |||||||||||||||||||||||||||
検出器 | タイプ: DECTRIS EIGER X 16M / 検出器: PIXEL / 日付: 2021年10月21日 | |||||||||||||||||||||||||||
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray | |||||||||||||||||||||||||||
放射波長 | 波長: 0.9536 Å / 相対比: 1 | |||||||||||||||||||||||||||
反射 | 解像度: 2.368→45.8 Å / Num. obs: 62334 / % possible obs: 99.3 % / 冗長度: 5.9 % / Biso Wilson estimate: 53.77 Å2 / CC1/2: 0.997 / Rmerge(I) obs: 0.092 / Rpim(I) all: 0.041 / Rrim(I) all: 0.101 / Net I/σ(I): 10.9 | |||||||||||||||||||||||||||
反射 シェル | Diffraction-ID: 1 / 冗長度: 5.8 %
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-位相決定
位相決定 | 手法: ![]() | |||||||||
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Phasing MR | Model details: Phaser MODE: MR_AUTO
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]() 開始モデル: generic Fab and RBD 解像度: 2.368→43.235 Å / SU ML: 0.33 / 交差検証法: THROUGHOUT / σ(F): 1.34 / 位相誤差: 25.98 / 立体化学のターゲット値: ML
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溶媒の処理 | 減衰半径: 0.9 Å / VDWプローブ半径: 1.11 Å / 溶媒モデル: FLAT BULK SOLVENT MODEL | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso max: 139.78 Å2 / Biso mean: 58.7074 Å2 / Biso min: 29.59 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: final / 解像度: 2.368→43.235 Å
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拘束条件 |
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LS精密化 シェル | Refine-ID: X-RAY DIFFRACTION / Rfactor Rfree error: 0
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精密化 TLS | 手法: refined / Origin x: 2.708 Å / Origin y: 41.2579 Å / Origin z: 76.4311 Å
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精密化 TLSグループ |
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