Determinant of receptor-preference switch in influenza hemagglutinin.

Determinant of receptor-preference switch in influenza hemagglutinin.
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DOI:
10.1016/j.virol.2017.10.010
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发表时间:
2018-01-01
期刊:
影响因子:
3.7
通讯作者:
Wang Q
Wang Q
中科院分区:
医学3区
文献类型:
--
作者:
Ni F;Kondrashkina E;Wang Q

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当来自其他动物物种的新毒株克服了物种间的障碍并支持快速的人际传播时,流感大流行就会发生。这一过程的一个关键先决条件是血凝素(HA)获得一些关键突变,从鸟类受体转换为人类受体。先前的研究表明,H1和H2/H3 HA使用不同的突变组进行转换。本报告显示,来自1918年H1N1大流行病毒的HA(1918 H1 HA)采用了H2/H3 HA在受体偏好转换中使用的一组突变,其130-环与H2/H3 HA相似。因此,130-环似乎是大流行H1或H2/H3 HA所采用的不同突变的关键决定因素。本研究揭示的突变途径和130环的相关性为有效研究其他HA亚型在人与人之间空气传播中所需的突变打开了大门。
Influenza pandemic occurs when a new strain from other animal species overcomes the inter-species barriers and supports rapid human-to-human transmission. A critical prerequisite to this process is that hemagglutinin (HA) acquires a few key mutations to switch from avian receptors to human receptors. Previous studies suggest that H1 and H2/H3 HAs use different sets of mutations for the switch. This report shows that HA from the 1918 H1N1 pandemic virus (1918H1 HA) adopts the set of mutations used by H2/H3 HAs in receptor-preference switch when its 130-loop is made similar to those of H2/H3 HAs. Thus, the 130-loop appears to be the key determinant for the different mutations employed by pandemic H1 or H2/H3 HA. The correlation of the mutational routes and the 130-loop as unraveled in this study opens the door for efficient investigation of mutations required by other HA subtypes for inter-human airborne transmission.
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