Increasing the potency and breadth of an HIV antibody by using structure-based rational design.

Increasing the potency and breadth of an HIV antibody by using structure-based rational design.
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DOI:
10.1126/science.1213782
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发表时间:
2011-12-02
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Bjorkman PJ
Bjorkman PJ
中科院分区:
其他
文献类型:
--
作者:
Diskin R;Scheid JF;Marcovecchio PM;West AP Jr;Klein F;Gao H;Gnanapragasam PN;Abadir A;Seaman MS;Nussenzweig MC;Bjorkman PJ

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针对HIV-1刺突蛋白gp120上的CD4结合位点(CD4bs)的抗体可显示出卓越的效力和广度。我们确定了NIH 45 - 46的结构,这是VRC01的一种更有效的克隆变体,单独和与gp120结合。与VRC01-gp120的比较显示,CDRH 3中的四个残基插入有助于NIH 45 - 46与gp120内部结构域之间的相互作用增加,这与增强的中和作用相关。我们使用基于结构的设计来创建NIH 45 - 46G54W,这是CDRH 2中的一个单一取代,其增加了与gp120桥接片的接触,并提高了宽度和效力,这是潜在临床应用的关键特性。与NIH 45 - 46-gp120结构一起,这些结果表明gp120内结构域/桥片残基应包含在免疫原中以引发CD 4bs抗体。
Antibodies against the CD4 binding site (CD4bs) on the HIV-1 spike protein gp120 can show exceptional potency and breadth. We determined structures of NIH45-46, a more potent clonal variant of VRC01, alone and bound to gp120. Comparisons with VRC01–gp120 revealed that a four-residue insertion in CDRH3 contributed to increased interaction between NIH45-46 and the gp120 inner domain, which correlated with enhanced neutralization. We used structure-based design to create NIH45-46G54W, a single substitution in CDRH2 that increases contact with the gp120 bridging sheet and improves breadth and potency, critical properties for potential clinical use, by an order of magnitude. Together with the NIH45-46–gp120 structure, these results indicate that gp120 inner domain/bridging sheet residues should be included in immunogens to elicit CD4bs antibodies.
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