Structural basis of synergistic neutralization of Crimean-Congo hemorrhagic fever virus by human antibodies.

Structural basis of synergistic neutralization of Crimean-Congo hemorrhagic fever virus by human antibodies.
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人抗体协同中和克里米亚-刚果出血热病毒的结构基础。

DOI:
10.1126/science.abl6502
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发表时间:
2022-01-07
期刊:
Science (New York, N.Y.)
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克里米亚-刚果出血热病毒(CCHFV)是传播最广泛的蜱传人畜共患病病毒,人类感染后的病死率为30%。目前缺乏关于CCHFV膜融合糖蛋白Gc(宿主中和抗体反应的主要靶点)以及抗体介导的中和机制的结构信息。在此,我们描述了与两种中和抗体的抗原结合片段结合的融合前Gc的结构(这两种抗体联合使用时具有协同作用),以及三聚体融合后Gc的结构。这些结构显示两种抗体片段(Fabs)协同作用以阻断膜融合:一种靶向融合环,另一种阻断Gc三聚体形成。这些结构还揭示了先前报道的抗CCHFV抗体的中和机制,为研发针对CCHFV的疫情防控医疗对策提供了必要的分子基础。 一种高致病性病毒的抗体中和机制的阐明为疫情防控提供了基础。
Crimean-Congo hemorrhagic fever virus (CCHFV) is the most widespread tick-borne zoonotic virus, with a 30% case fatality rate in humans. Structural information on the CCHFV membrane fusion glycoprotein Gc–the main target of the host neutralizing antibody response–and on antibody-mediated neutralization mechanisms are lacking. Here we describe the structure of pre-fusion Gc bound to the antigen-binding fragments of two neutralizing antibodies displaying synergy when combined, as well as the structure of trimeric, post-fusion Gc. The structures show the two Fabs acting in concert to block membrane fusion: one targeting the fusion loops and the other blocking Gc trimer formation. The structures also revealed the neutralization mechanism of previously reported anti-CCHFV antibodies, providing the molecular underpinnings essential for developing CCHFV-specific medical countermeasures for epidemic preparedness. The elucidation of antibody neutralization mechanisms of a highly pathogenic virus provides a foundation for epidemic preparedness.
DOI: 10.1107/s0907444910051218
发表时间: 2011-04
期刊: Acta crystallographica. Section D, Biological crystallography
影响因子: --
作者:
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通讯作者: Read RJ
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DOI: 10.1126/science.aal2712
发表时间: 2017-11-03
期刊: SCIENCE
影响因子: 56.9
作者:
Guardado-Calvo, P.;Atkovska, K.;Rey, F. A.
通讯作者: Rey, F. A.