Unraveling the structure of viral replication complexes at super-resolution.

Unraveling the structure of viral replication complexes at super-resolution.
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DOI:
10.3389/fpls.2013.00006
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发表时间:
2013
影响因子:
5.6
通讯作者:
Oparka KJ
Oparka KJ
中科院分区:
生物学2区
文献类型:
--
作者:
Linnik O;Liesche J;Tilsner J;Oparka KJ

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在感染过程中,许多RNA病毒产生包含病毒和宿主成分的特征性包涵体。这些结构最初是在一个多世纪前被描述的,最初被称为“x体”,因为它们的功能并没有立即被认识到。虽然一些包涵体可能代表病毒蛋白过度积累的细胞病变副产物,但x -小体已经成为病毒“工厂”,是协调多种病毒感染过程的准细胞器,如复制、蛋白质表达、逃避宿主防御、病毒粒子组装和细胞间运输。因此,它们现在通常被称为病毒复制复合体(VRCs)。我们以前使用共聚焦荧光显微镜揭示了马铃薯病毒X (PVX)产生的X-体的复杂结构。在这里,我们使用3d结构照明(3D-SIM)超分辨率显微镜在更精细的尺度上绘制PVX x体。我们发现了PVX“三重基因块”(TGB)蛋白诱导的一种以前未被识别的膜结构,为x体内病毒与宿主之间复杂的相互作用提供了新的见解。
During infection, many RNA viruses produce characteristic inclusion bodies that contain both viral and host components. These structures were first described over a century ago and originally termed “X-bodies,” as their function was not immediately appreciated. Whilst some inclusion bodies may represent cytopathic by-products of viral protein over-accumulation, X-bodies have emerged as virus “factories,” quasi-organelles that coordinate diverse viral infection processes such as replication, protein expression, evasion of host defenses, virion assembly, and intercellular transport. Accordingly, they are now generally referred to as viral replication complexes (VRCs). We previously used confocal fluorescence microscopy to unravel the complex structure of X-bodies produced by Potato virus X (PVX). Here we used 3D-structured illumination (3D-SIM) super-resolution microscopy to map the PVX X-body at a finer scale. We identify a previously unrecognized membrane structure induced by the PVX “triple gene block” (TGB) proteins, providing new insights into the complex interplay between virus and host within the X-body.
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