Differential processing of HIV envelope glycans on the virus and soluble recombinant trimer.

Differential processing of HIV envelope glycans on the virus and soluble recombinant trimer.
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DOI:
10.1038/s41467-018-06121-4
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发表时间:
2018-09-12
影响因子:
16.6
通讯作者:
Paulson JC
Paulson JC
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Cao L;Pauthner M;Andrabi R;Rantalainen K;Berndsen Z;Diedrich JK;Menis S;Sok D;Bastidas R;Park SR;Delahunty CM;He L;Guenaga J;Wyatt RT;Schief WR;Ward AB;Yates JR 3rd;Burton DR;Paulson JC

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作为针对HIV的广泛中和抗体(bnAb)的唯一靶标,包膜糖蛋白(Env)三聚体是设计用于在人类中引发保护性bnAb的疫苗接种策略的焦点。由于HIV Env是密集糖基化的,每个三聚体有75-90个N-聚糖,大多数bnAb在其结合表位中使用或容纳它们,使得重组Env的糖基化成为HIV疫苗设计的关键方面。在分析三种HIV毒株后,我们发现感染性病毒Env的位点特异性糖基化与相应重组膜结合三聚体的Env密切匹配。然而,病毒Env与重组可溶性切割(SOSIP)Env三聚体显著不同,强烈影响抗原性。这些结果提供了设计可溶性Env三聚体作为整体HIV疫苗策略的一部分所需的病毒Env糖基化的基准。HIV包膜蛋白(Env)是一种潜在的疫苗抗原,其N-聚糖是广泛中和抗体表位的一部分。在这里,作者表明,来自感染性病毒的Env的糖基化与来自重组膜结合三聚体的Env密切匹配,而它与重组可溶性切割的Env三聚体显著不同。
As the sole target of broadly neutralizing antibodies (bnAbs) to HIV, the envelope glycoprotein (Env) trimer is the focus of vaccination strategies designed to elicit protective bnAbs in humans. Because HIV Env is densely glycosylated with 75–90 N-glycans per trimer, most bnAbs use or accommodate them in their binding epitope, making the glycosylation of recombinant Env a key aspect of HIV vaccine design. Upon analysis of three HIV strains, we here find that site-specific glycosylation of Env from infectious virus closely matches Envs from corresponding recombinant membrane-bound trimers. However, viral Envs differ significantly from recombinant soluble, cleaved (SOSIP) Env trimers, strongly impacting antigenicity. These results provide a benchmark for virus Env glycosylation needed for the design of soluble Env trimers as part of an overall HIV vaccine strategy. HIV envelope (Env) is a potential vaccine antigen and its N-glycans are part of the epitope of broadly neutralizing antibodies. Here, the authors show that glycosylation of Env from infectious virus closely matches Env from recombinant membrane-bound trimers, while it differs significantly from recombinant soluble, cleaved Env trimers.
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