Influenza virus ribonucleoprotein complex formation occurs in the nucleolus

Influenza virus ribonucleoprotein complex formation occurs in the nucleolus
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流感病毒核糖核蛋白复合物的形成发生在核仁中

DOI:
10.1101/2021.02.24.432647
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发表时间:
2021
期刊:
bioRxiv
影响因子:
--
通讯作者:
Noda Takeshi
Noda Takeshi
中科院分区:
--
文献类型:
--
作者:
Miyamoto Sho;Nakano Masahiro;Morikawa Takeshi;Hirabayashi Ai;Tamura Ryoma;Fujita Yoko;Hirose Nanami;Muramoto Yukiko;Noda Takeshi

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甲型流感病毒双螺旋核糖核蛋白复合物(vRNP)执行病毒基因组RNA(vRNA)的转录和复制。与大多数RNA病毒不同,vRNP的形成伴随着vRNA复制在病毒感染细胞的细胞核中进行。然而,精确的亚核位置仍然未知。在这里,我们报告了流感病毒vRNP形成的亚核位点。我们发现所有vRNP组分在病毒感染的早期共定位于细胞的核仁中。突变分析表明,核仁定位的病毒核蛋白,一个主要的vRNP组件,是至关重要的功能性双螺旋vRNP的形成。此外,病毒感染细胞的核仁破坏抑制vRNP组件组装成双螺旋vRNP,导致vRNA转录和复制减少。总的来说,我们的研究结果表明,vRNA复制偶联的vRNP形成发生在核仁中,证明了核仁对流感病毒生命周期的重要性。
Influenza A virus double-helical ribonucleoprotein complex (vRNP) performs transcription and replication of viral genomic RNA (vRNA). Unlike most RNA viruses, vRNP formation accompanied by vRNA replication is carried out in the nucleus of virus-infected cell. However, the precise subnuclear site remains unknown. Here, we report the subnuclear site of vRNP formation in influenza virus. We found that all vRNP components were colocalized in the nucleolus of virus-infected cells at early stage of infection. Mutational analysis showed that nucleolar localization of viral nucleoprotein, a major vRNP component, is critical for functional double-helical vRNP formation. Furthermore, nucleolar disruption of virus-infected cells inhibited vRNP component assembly into double-helical vRNPs, resulting in decreased vRNA transcription and replication. Collectively, our findings demonstrate that the vRNA replication-coupled vRNP formation occurs in the nucleolus, demonstrating the importance of the nucleolus for influenza virus life cycle.
DOI: 10.1016/0167-4781(85)90002-8
发表时间: 1985-12
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影响因子: --
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逆聚合酶链反应。
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