Receptor mimicry by antibody F045-092 facilitates universal binding to the H3 subtype of influenza virus.

Receptor mimicry by antibody F045-092 facilitates universal binding to the H3 subtype of influenza virus.
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DOI:
10.1038/ncomms4614
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发表时间:
2014-04-10
影响因子:
16.6
通讯作者:
Wilson, Ian A.
Wilson, Ian A.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lee, Peter S.;Ohshima, Nobuko;Stanfield, Robyn L.;Yu, Wenli;Iba, Yoshitaka;Okuno, Yoshinobu;Kurosawa, Yoshikazu;Wilson, Ian A.

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流感病毒每年都带来重大的健康挑战,比如2012 - 2013年的H3N2疫情。在此,我们描述了一种抗体F045 - 092,它对整个H3亚型具有广泛的中和活性,并能适应1963年至2011年所测试的所有毒株的自然变异和额外的糖基化。F045 - 092与1975年和2011年H3N2病毒的血凝素(HA)形成的复合物的晶体结构,通过其23个残基的重链互补决定区3(HCDR3)插入受体结合位点(涉及显著的受体模拟),揭示了其广泛中和作用的结构基础。F045 - 092利用其IgG增强的亲和力克服较低亲和力的抗原结合片段(Fab)结合,将其识别范围扩展到不同的亚型,包括H1、H2和H13,这与其他受体结合位点抗体所观察到的情况相同。这种针对H3亚型的抗体前所未有的交叉反应水平,可能为泛H3疫苗或小分子疗法的开发提供信息。
Influenza viruses present a significant health challenge each year, as in the H3N2 epidemic of 2012-2013. Here, we describe an antibody, F045-092, that possesses broadly neutralizing activity against the entire H3 subtype and accommodates the natural variation and additional glycosylation in all strains tested from 1963 to 2011. Crystal structures of F045-092 in complex with HAs from 1975 and 2011 H3N2 viruses reveal the structural basis for its neutralization breadth through insertion of its 23-residue HCDR3 into the receptor-binding site that involves striking receptor mimicry. F045-092 extends its recognition to divergent subtypes, including H1, H2, and H13, using the enhanced avidity of its IgG to overcome lower affinity Fab binding, as observed with other receptor-binding site antibodies. This unprecedented level of antibody cross-reactivity against the H3 subtype can potentially inform on development of a pan-H3 vaccine or small molecule therapeutics.
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