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The role of the third β strand in gp120 conformation and neutralization sensitivity of the HIV-1 primary isolate DH012

机译:第三条β链在HIV-1主要分离株DH012的gp120构象和中和敏感性中的作用

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摘要

Neutralization of HIV-1 primary isolates has been a tremendous challenge for AIDS vaccine development. Here, we identify a single amino acid change (T198P) in gp120 that alters the neutralization sensitivity of the primary isolate DH012 to antibodies against multiple neutralization epitopes that include the V3, CD4-induced, and CD4 binding sites in gp120. This mutation is located in the V1/V2 stem region that forms the third β strand (β3) of the bridging sheet of gp120. The conformation of variable loops, especially V1/V2 and V3, was proposed to regulate the accessibility of these neutralization epitopes. The results of this study indicate a direct association between the V1/V2 and V3 loops of DH012 gp120.
机译:HIV-1主要分离株的中和一直是艾滋病疫苗开发的巨大挑战。在这里,我们确定了gp120中的单个氨基酸变化(T198P),该变化改变了主要分离物DH012对多种中和表位的抗体的中和敏感性,这些中和表位包括gp120中的V3,CD4诱导和CD4结合位点。此突变位于形成gp120桥接片的第三条β链(β3)的V1 / V2茎区域。提出了可变环的构象,尤其是V1 / V2和V3,以调节这些中和表位的可及性。这项研究的结果表明DH012 gp120的V1 / V2和V3回路之间存在直接关联。

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