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首页> 外文期刊>EMBO Journal >Small RNA binding is a common strategy to suppress RNA silencing by several viral suppressors
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Small RNA binding is a common strategy to suppress RNA silencing by several viral suppressors

机译:小核糖核酸绑定是一种常见的策略来抑制RNA沉默了几个病毒抑制

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摘要

RNA silencing is an evolutionarily conserved system that functions as an antiviral mechanism in higher plants and insects. To counteract RNA silencing, viruses express silencing suppressors that interfere with both siRNA- and microRNA-guided silencing pathways. We used comparative in vitro and in vivo approaches to analyse the molecular mechanism of suppression by three well-studied silencing suppressors. We found that silencing suppressors p19, p21 and HC-Pro each inhibit the intermediate step of RNA silencing via binding to siRNAs, although the molecular features required for duplex siRNA binding differ among the three proteins. None of the suppressors affected the activity of preassembled RISC complexes. In contrast, each suppressor uniformly inhibited the siRNA- initiated RISC assembly pathway by preventing RNA silencing initiator complex formation.
机译:RNA沉默是一种进化保守系统功能作为一种抗病毒机制在高等植物和昆虫。沉默、病毒表达沉默抑制干扰siRNA -和microRNA-guided沉默途径。比较体外和体内的方法分析抑制的分子机制研究过的三个沉默抑制。发现沉默抑制p19 p21和HC-Pro每个抑制RNA的中间步骤通过绑定siRNAs沉默,虽然分子双siRNA所需功能绑定不同的三种蛋白质。抑制活性的影响预装配的RISC复合物。抑制均匀抑制了siRNA -发起RISC组装途径通过防止RNA沉默启动程序复杂的形成。

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