ジャーナル: MAbs / 年: 2021 タイトル: Potent SARS-CoV-2 binding and neutralization through maturation of iconic SARS-CoV-1 antibodies. 著者: Romain Rouet / Ohan Mazigi / Gregory J Walker / David B Langley / Meghna Sobti / Peter Schofield / Helen Lenthall / Jennifer Jackson / Stephanie Ubiparipovic / Jake Y Henry / Arunasingam ...著者: Romain Rouet / Ohan Mazigi / Gregory J Walker / David B Langley / Meghna Sobti / Peter Schofield / Helen Lenthall / Jennifer Jackson / Stephanie Ubiparipovic / Jake Y Henry / Arunasingam Abayasingam / Deborah Burnett / Anthony Kelleher / Robert Brink / Rowena A Bull / Stuart Turville / Alastair G Stewart / Christopher C Goodnow / William D Rawlinson / Daniel Christ / 要旨: Antibodies against coronavirus spike protein potently protect against infection and disease, but whether such protection can be extended to variant coronaviruses is unclear. This is exemplified by a ...Antibodies against coronavirus spike protein potently protect against infection and disease, but whether such protection can be extended to variant coronaviruses is unclear. This is exemplified by a set of iconic and well-characterized monoclonal antibodies developed after the 2003 SARS outbreak, including mAbs m396, CR3022, CR3014 and 80R, which potently neutralize SARS-CoV-1, but not SARS-CoV-2. Here, we explore antibody engineering strategies to change and broaden their specificity, enabling nanomolar binding and potent neutralization of SARS-CoV-2. Intriguingly, while many of the matured clones maintained specificity of the parental antibody, new specificities were also observed, which was further confirmed by X-ray crystallography and cryo-electron microscopy, indicating that a limited set of VH antibody domains can give rise to variants targeting diverse epitopes, when paired with a diverse VL repertoire. Our findings open up over 15 years of antibody development efforts against SARS-CoV-1 to the SARS-CoV-2 field and outline general principles for the maturation of antibody specificity against emerging viruses.
温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 6.65 詳細: Protein (9.6 mg/mL) was mixed with an equal volume (2 uL) of well solution comprising 200 mM sodium citrate (pH 6.65) and 24% (w/v) PEG3350. Cryoprotection was achieved by briefly (5-10 sec) ...詳細: Protein (9.6 mg/mL) was mixed with an equal volume (2 uL) of well solution comprising 200 mM sodium citrate (pH 6.65) and 24% (w/v) PEG3350. Cryoprotection was achieved by briefly (5-10 sec) swimming crystals in well solution doped with glycerol to a final concentration of ~25% (v/v), prior to snap freezing.
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データ収集
回折
平均測定温度: 100 K / Serial crystal experiment: N
放射光源
由来: シンクロトロン / サイト: Australian Synchrotron / ビームライン: MX2 / 波長: 0.9537 Å
解像度: 1.69→49.05 Å / Cor.coef. Fo:Fc: 0.97 / Cor.coef. Fo:Fc free: 0.96 / SU B: 3.015 / SU ML: 0.05 / SU R Cruickshank DPI: 0.0744 / 交差検証法: THROUGHOUT / σ(F): 0 / ESU R: 0.074 / ESU R Free: 0.076 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES : WITH TLS ADDED
Rfactor
反射数
%反射
Selection details
Rfree
0.192
3631
5 %
RANDOM
Rwork
0.166
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obs
0.1673
68990
99.9 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK