Codon-usage-based inhibition of HIV protein synthesis by human schlafen 11.

Codon-usage-based inhibition of HIV protein synthesis by human schlafen 11.
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DOI:
10.1038/nature11433
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发表时间:
2012-11-01
期刊:
影响因子:
64.8
通讯作者:
David, Michael
David, Michael
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li, Manqing;Kao, Elaine;Gao, Xia;Sandig, Hilary;Limmer, Kirsten;Pavon-Eternod, Mariana;Jones, Thomas E.;Landry, Sebastien;Pan, Tao;Weitzman, Matthew D.;David, Michael

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在哺乳动物中,病毒感染最显着的后果之一是诱导 I 型干扰素,即具有有效抗病毒活性的细胞因子。 Schlafen (Slfn) 基因是干扰素刺激的早期反应基因 (ISG) 的一个子集,也由病原体通过干扰素调节因子 3 (IRF3) 途径直接诱导。然而,许多 ISG 的功能未知或不完全了解。在这里,我们证明人类 SLFN11 有效且特异性地消除逆转录病毒的产生,例如人类免疫缺陷病毒 1 (HIV-1)。我们的研究表明,SLFN11 对逆转录病毒感染周期的早期步骤没有影响,包括逆转录、整合和转录。相反,SLFN11 在病毒产生的后期发挥作用,以密码子使用依赖性方式选择性抑制病毒蛋白的表达。我们进一步发现 SLFN11 结合转移 RNA,并抵消 HIV 存在引起的 tRNA 库的变化。我们的研究在先天免疫反应中发现了一种新的抗病毒机制,其中 SLFN11 通过密码子偏倚歧视选择性抑制 HIV 感染细胞中的病毒蛋白合成。
In mammals, one of the most pronounced consequences of viral infection is the induction of type I interferons, cytokines with potent antiviral activity. Schlafen (Slfn) genes are a subset of interferon-stimulated early response genes (ISGs) that are also induced directly by pathogens via the interferon regulatory factor 3 (IRF3) pathway. However, many ISGs are of unknown or incompletely understood function. Here we show that human SLFN11 potently and specifically abrogates the production of retroviruses such as human immunodeficiency virus 1 (HIV-1). Our study revealed that SLFN11 has no effect on the early steps of the retroviral infection cycle, including reverse transcription, integration and transcription. Rather, SLFN11 acts at the late stage of virus production by selectively inhibiting the expression of viral proteins in a codon-usage-dependent manner. We further find that SLFN11 binds transfer RNA, and counteracts changes in the tRNA pool elicited by the presence of HIV. Our studies identified a novel antiviral mechanism within the innate immune response, in which SLFN11 selectively inhibits viral protein synthesis in HIV-infected cells by means of codon-bias discrimination.
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