Adaptive duplication and genetic diversification of protein kinase R contribute to the specificity of bat-virus interactions.

Adaptive duplication and genetic diversification of protein kinase R contribute to the specificity of bat-virus interactions.
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DOI:
10.1126/sciadv.add7540
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发表时间:
2022-11-25
期刊:
影响因子:
13.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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一些蝙蝠物种作为许多病毒的无症状宿主,这些病毒在其他哺乳动物中具有高致病性。在这里,我们的特点是功能多样化的蛋白激酶R(PKR),一个主要的抗病毒先天防御系统。我们的数据表明,PKR已经在积极的选择下进化,并在蝙蝠中经历了重复的基因组复制,而所有研究的哺乳动物都有一个单一的基因拷贝。PKR和痘病毒拮抗剂之间的关系的功能测试揭示了如何与古老的致病性痘病毒的进化冲突形成了一个特定的蝙蝠宿主病毒界面。我们确定鼠耳蝠物种的重复PKR经历了遗传多样性,使它们能够集体逃离并增强对DNA和RNA病毒的控制。这些研究结果表明,病毒驱动的适应PKR有助于现代病毒蝙蝠的相互作用,并可能占蝙蝠特异性免疫。蝙蝠PKR的特殊适应性驱动了宿主与现代病毒的特异性相互作用以及蝙蝠的有效抗病毒反应。
Several bat species act as asymptomatic reservoirs for many viruses that are highly pathogenic in other mammals. Here, we have characterized the functional diversification of the protein kinase R (PKR), a major antiviral innate defense system. Our data indicate that PKR has evolved under positive selection and has undergone repeated genomic duplications in bats in contrast to all studied mammals that have a single copy of the gene. Functional testing of the relationship between PKR and poxvirus antagonists revealed how an evolutionary conflict with ancient pathogenic poxviruses has shaped a specific bat host-virus interface. We determined that duplicated PKRs of the Myotis species have undergone genetic diversification, allowing them to collectively escape from and enhance the control of DNA and RNA viruses. These findings suggest that viral-driven adaptations in PKR contribute to modern virus-bat interactions and may account for bat-specific immunity. Exceptional adaptations in bat PKR drive host-specific interactions with modern viruses and potent antiviral response in bats.
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