Visualisation and analysis of hepatitis C virus non-structural proteins using super-resolution microscopy.

Visualisation and analysis of hepatitis C virus non-structural proteins using super-resolution microscopy.
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DOI:
10.1038/s41598-018-31861-0
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发表时间:
2018-09-11
期刊:
影响因子:
4.6
通讯作者:
Harris M
Harris M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bartlett C;Curd A;Peckham M;Harris M

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丙型肝炎病毒(HCV)RNA复制发生在一个专门的膜隔室内感染细胞的胞质溶胶中。病毒的非结构(NS)蛋白如何在这些结构中结合和组织仍然不清楚。我们采用超分辨率显微镜方法来可视化HCV感染细胞中的NS3和NS5A。使用单分子定位显微镜,两个NS蛋白被解析为小于通过宽场观察到的衍射限制体积的定位簇。蛋白质簇的分析确定了NS蛋白质之间的大小的显着差异。我们还观察到使用达卡他韦抑制RNA复制后NS5A簇大小的减少,这是一种在Y93 H抗性相关取代存在下保持的表型,而对于NS3簇未观察到。这些结果提供了深入了解丙型肝炎病毒RNA复制复合物内的NS蛋白组织和NS5A抑制剂的作用模式。
Hepatitis C virus (HCV) RNA replication occurs in the cytosol of infected cells within a specialised membranous compartment. How the viral non-structural (NS) proteins are associated and organised within these structures remains poorly defined. We employed a super-resolution microscopy approach to visualise NS3 and NS5A in HCV infected cells. Using single molecule localisation microscopy, both NS proteins were resolved as clusters of localisations smaller than the diffraction-limited volume observed by wide-field. Analysis of the protein clusters identified a significant difference in size between the NS proteins. We also observed a reduction in NS5A cluster size following inhibition of RNA replication using daclatasvir, a phenotype which was maintained in the presence of the Y93H resistance associated substitution and not observed for NS3 clusters. These results provide insight into the NS protein organisation within hepatitis C virus RNA replication complexes and the mode of action of NS5A inhibitors.
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