Structural basis for broad and potent neutralization of HIV-1 by antibody VRC01.
Structural basis for broad and potent neutralization of HIV-1 by antibody VRC01.
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DOI:
10.1126/science.1192819
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发表时间:
2010-08-13
期刊:
影响因子:
--
通讯作者:
Kwong PD
中科院分区:
文献类型:
--
作者:
Zhou T;Georgiev I;Wu X;Yang ZY;Dai K;Finzi A;Kwon YD;Scheid JF;Shi W;Xu L;Yang Y;Zhu J;Nussenzweig MC;Sodroski J;Shapiro L;Nabel GJ;Mascola JR;Kwong PD
During natural infection by HIV-1, antibodies are generated against the region of the viral gp120 envelope glycoprotein that binds CD4, the primary receptor for HIV-1. Among these antibodies, VRC01 achieves extensive neutralization of diverse viral strains. To understand the structural basis for its neutralization breadth and potency, we determined the crystal structure of VRC01 in complex with an HIV-1 gp120 core. The heavy chain of VRC01 interacts with gp120 in a manner similar to CD4. A 43° rotation coupled with a 6-Å shift from the CD4-defined orientation focuses VRC01 onto the conformationally invariant site of initial CD4 attachment, allowing it to overcome the masking that diminishes the neutralization potency of most CD4-binding-site antibodies. To achieve this mode of recognition, VRC01 contacts gp120 mainly through V-gene-derived regions substantially altered from their genomic precursors. Partial receptor mimicry and extensive affinity maturation thus facilitate effective neutralization of HIV-1 by natural human antibodies.
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