Initiation of protein-primed picornavirus RNA synthesis.

Initiation of protein-primed picornavirus RNA synthesis.
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DOI:
10.1016/j.virusres.2014.12.028
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发表时间:
2015-08-03
期刊:
影响因子:
5
通讯作者:
Wimmer E
Wimmer E
中科院分区:
医学3区
文献类型:
--
作者:
Paul AV;Wimmer E

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正链RNA病毒使用不同的机制来启动其RNA链的合成。小核糖核酸病毒科(Picornaviridae)家族构成一大组正链RNA病毒,其具有共价连接至其基因组的5 '末端的小末端蛋白(VPg)。这些病毒的RNA聚合酶使用VPg作为负链和正链RNA合成的引物。在起始反应的第一步中,RNA聚合酶使用位于病毒基因组不同区域的顺式复制元件(cre)作为模板,将UMP连接到VPg中酪氨酸的羟基。在这篇综述中,我们将总结什么是已知的启动反应蛋白质引发的RNA合成的RNA聚合酶的小核糖核酸病毒。作为一个例子,我们将使用脊髓灰质炎病毒的RNA聚合酶,小核糖核酸病毒科的原型。我们还将讨论如何使用这些核苷酸酰化的蛋白质引物的模型,连同病毒和细胞的复制蛋白和其他顺式复制的RNA元素,在负链和正链RNA合成。
Plus strand RNA viruses use different mechanisms to initiate the synthesis of their RNA chains. The Picornaviridae family constitutes a large group of plus strand RNA viruses that possess a small terminal protein (VPg) covalently linked to the 5’-end of their genomes. The RNA polymerases of these viruses use VPg as primer for both minus and plus strand RNA synthesis. In the first step of the initiation reaction the RNA polymerase links a UMP to the hydroxyl group of a tyrosine in VPg using as template a cis-replicating element (cre) positioned in different regions of the viral genome. In this review we will summarize what is known about the intiation reaction of protein-primed RNA synthesis by the RNA polymerases of the Picornaviridae. As an example we will use the RNA polymerase of poliovirus, the prototype of Picornaviridae. We will also discuss models of how these nucleotidylylated protein primers might be used, together with viral and cellular replication proteins and other cis-replicating RNA elements, during minus and plus strand RNA synthesis.
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