Herpes Simplex Virus 1 Serine/Threonine Kinase US3 Hyperphosphorylates IRF3 and Inhibits Beta Interferon Production

Herpes Simplex Virus 1 Serine/Threonine Kinase US3 Hyperphosphorylates IRF3 and Inhibits Beta Interferon Production
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单纯疱疹病毒 1 丝氨酸/苏氨酸激酶 US3 过度磷酸化 IRF3 并抑制 β 干扰素产生

DOI:
10.1128/jvi.02355-13
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发表时间:
2013-09
影响因子:
5.4
通讯作者:
Zheng Chunfu
Zheng Chunfu
中科院分区:
医学2区
文献类型:
--
作者:
Wang Shuai;Wang Kezhen;Lin Rongtuan;Zheng Chunfu

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摘要 病毒感染启动一系列信号级联反应,导致干扰素(IFN)转录,最终诱导干扰素刺激基因(ISG)消灭病毒。病毒已经进化出多种策略来调节宿主干扰素介导的免疫反应。单纯疱疹病毒 1 (HSV-1) US3 是一种在 α 疱疹病毒中保守的 Ser/Thr 激酶,之前有报道称它可以抵消宿主的先天免疫;然而,其分子机制尚不清楚。在这项研究中,我们报告 US3 通过过度磷酸化 IFN 调节因子 3 (IRF3) 来阻断 IFN-β 的产生。 US3蛋白的异位表达显着抑制仙台病毒(SeV)介导的IFN-β和IFN刺激反应元件(ISRE)启动子的激活以及IFN-β、ISG54和ISG56的转录。 US3 还被证明可以阻断 SeV 诱导的 IRF3 二聚化和核转位。激酶活性对于其抑制功能是不可或缺的,因为激酶死亡 (KD) US3 突变体 K220M 和 D305A 不能抑制 IFN-β 的产生。此外,US3 与 IRF3 Ser175 相互作用并使其过度磷酸化,以防止 IRF3 激活。最后,构建了US3 KD突变病毒并分别表示为K220M或D305A HSV-1。感染这两种突变病毒的细胞和小鼠比感染野生型 HSV-1 的细胞和小鼠产生显着更多的 IFN-β。这些发现首次提供了令人信服的证据,证明 US3 使 IRF3 过度磷酸化,阻断 IFN-β 的产生,并破坏宿主先天免疫。
ABSTRACT Viral infection initiates a series of signaling cascades that lead to the transcription of interferons (IFNs), finally inducing interferon-stimulated genes (ISGs) to eliminate viruses. Viruses have evolved a variety of strategies to modulate host IFN-mediated immune responses. Herpes simplex virus 1 (HSV-1) US3, a Ser/Thr kinase conserved in alphaherpesviruses, was previously reported to counteract host innate immunity; however, the molecular mechanism is elusive. In this study, we report that US3 blocks IFN-β production by hyperphosphorylating IFN regulatory factor 3 (IRF3). Ectopic expression of US3 protein significantly inhibited Sendai virus (SeV)-mediated activation of IFN-β and IFN-stimulated response element (ISRE) promoters and the transcription of IFN-β, ISG54, and ISG56. US3 was also shown to block SeV-induced dimerization and nuclear translocation of IRF3. The kinase activity was indispensable for its inhibitory function, as kinase-dead (KD) US3 mutants K220M and D305A could not inhibit IFN-β production. Furthermore, US3 interacted with and hyperphosphorylated IRF3 at Ser175 to prevent IRF3 activation. Finally, the US3 KD mutant viruses were constructed and denoted K220M or D305A HSV-1, respectively. Cells and mice infected with both mutant viruses produced remarkably larger amounts of IFN-β than those infected with wild-type HSV-1. For the first time, these findings provide convincing evidence that US3 hyperphosphorylates IRF3, blocks the production of IFN-β, and subverts host innate immunity.
DOI: 10.1186/1743-422x-5-140
发表时间: 2008-11-21
期刊: Virology journal
影响因子: 4.8
作者:
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通讯作者: Hukkanen V
单纯疱疹病毒 1 编码的被膜蛋白 VP16 通过抑制 NF-κ B 激活和阻断 IFN 调节因子 3 招募其共激活剂 CBP 来消除 β 干扰素 (IFN) 的产生
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发表时间: 2013
影响因子: 5.4
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DOI: 10.1371/journal.pone.0016870
发表时间: 2011-02-09
期刊: PloS one
影响因子: 3.7
作者:
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发表时间: 1999-09-01
影响因子: 5.4
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DOI: 10.1038/35099560
发表时间: 2001-10-18
期刊: NATURE
影响因子: 64.8
作者:
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通讯作者: Flavell, RA