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Nat Commun. 2018 Mar 28;9(1):1264. doi: 10.1038/s41467-018-03663-5.
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Science. 2013 Nov 22;342(6161):976-9. doi: 10.1126/science.1244730.
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上位性相互作用可以调节流感 H3N2 病毒血凝素中替换的抗原效应。

Epistatic interactions can moderate the antigenic effect of substitutions in haemagglutinin of influenza H3N2 virus.

机构信息

1 Department of Viroscience, Erasmus MC, Rotterdam, The Netherlands.

2 Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge, UK.

出版信息

J Gen Virol. 2019 May;100(5):773-777. doi: 10.1099/jgv.0.001263. Epub 2019 Apr 24.

DOI:10.1099/jgv.0.001263
PMID:31017567
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7176280/
Abstract

We previously showed that single amino acid substitutions at seven positions in haemagglutinin determined major antigenic change of influenza H3N2 virus. Here, the impact of two such substitutions was tested in 11 representative H3 haemagglutinins to investigate context-dependence effects. The antigenic effect of substitutions introduced at haemagglutinin position 145 was fully independent of the amino acid context of the representative haemagglutinins. Antigenic change caused by substitutions introduced at haemagglutinin position 155 was variable and context-dependent. Our results suggest that epistatic interactions with contextual amino acids in the haemagglutinin can moderate the magnitude of antigenic change.

摘要

我们之前的研究表明,血凝素(hemagglutinin)七个位置的单个氨基酸取代决定了流感 H3N2 病毒的主要抗原性变化。在这里,我们在 11 种具有代表性的 H3 血凝素中测试了这两种取代的影响,以研究上下文相关效应。在血凝素位置 145 引入的取代的抗原效应完全独立于代表性血凝素的氨基酸上下文。在血凝素位置 155 引入的取代引起的抗原变化是可变的和上下文相关的。我们的研究结果表明,与血凝素中上下文氨基酸的上位效应相互作用可以调节抗原性变化的幅度。