Expanding knowledge of P3 proteins in the poliovirus lifecycle.

Expanding knowledge of P3 proteins in the poliovirus lifecycle.
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DOI:
10.2217/fmb.10.40
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发表时间:
2010-06
影响因子:
3.1
通讯作者:
Moustafa IM
Moustafa IM
中科院分区:
生物学3区
文献类型:
--
作者:
Cameron CE;Oh HS;Moustafa IM

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脊髓灰质炎病毒是研究最广泛的小核糖核酸病毒目成员,其中包含许多医学,兽医和农业病原体。小核糖核酸病毒基因组编码一个单一的多蛋白,分为三个区域:P1,P2和P3。已知P3蛋白更直接地参与基因组复制,例如通过包含病毒RNA依赖性RNA聚合酶(RdRp或3Dpol)以及其他几种蛋白质和酶。我们将回顾最近的数据,提供了新的见解的结构,功能和机制的P3蛋白及其复合物,这是启动基因组复制所需的。脊髓灰质炎病毒基因组的复制发生在大分子复合物内,包含病毒RNA、病毒蛋白和宿主细胞膜,统称为复制复合物。P2蛋白显然有助于与病毒增殖所需的宿主细胞的相互作用,包括复制复合物的形成。我们将讨论最近的数据表明P3蛋白在复制复合物的形成中的作用。脊髓灰质炎病毒生命周期中最不为人所知的步骤是基因组RNA的降解。我们还将描述表明P3蛋白在这一步骤中的作用的数据。
Poliovirus is the most extensively studied member of the order Picornavirales, which contains numerous medical, veterinary and agricultural pathogens. The picornavirus genome encodes a single polyprotein that is divided into three regions: P1, P2 and P3. P3 proteins are known to participate more directly in genome replication, for example by containing the viral RNA-dependent RNA polymerase (RdRp or 3Dpol), among several other proteins and enzymes. We will review recent data that provide new insight into the structure, function and mechanism of P3 proteins and their complexes, which are required for initiation of genome replication. Replication of poliovirus genomes occurs within macromolecular complexes, containing viral RNA, viral proteins and host-cell membranes, collectively referred to as replication complexes. P2 proteins clearly contribute to interactions with the host cell that are required for virus multiplication, including formation of replication complexes. We will discuss recent data that suggest a role for P3 proteins in formation of replication complexes. Among the least understood steps of the poliovirus lifecycle is encapsidation of genomic RNA. We will also describe data that suggest a role for P3 proteins in this step.
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