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Brothers in Arms: Structure Assembly and Function of Arenaviridae Nucleoprotein

机译:武器中的兄弟:arenaviridae核蛋白的结构组装和功能

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摘要

is a family of viruses harbouring important emerging pathogens belonging to the order. Like in other segmented negative strand RNA viruses, the nucleoprotein (NP) is a major actor of the viral life cycle being both (i) the necessary co-factor of the polymerase present in the L protein, and (ii) the last line of defence of the viral genome (vRNA) by physically hiding its presence in the cytoplasm. The NP is also one of the major players interfering with the immune system. Several structural studies of NP have shown that it features two domains: a globular RNA binding domain (NP-core) in its N-terminal and an exonuclease domain (ExoN) in its C-terminal. Further studies have observed that significant conformational changes are necessary for RNA encapsidation. In this review we revisited the most recent structural and functional data available on NP, compared to other nucleoproteins and explored the structural and functional implications. We review the variety of structural motif extensions involved in NP–NP binding mode. We also evaluate the major functional implications of NP interactome and the role of ExoN, thus making the NP a target of choice for future vaccine and antiviral therapy.
机译:是一个含有属于订单的重要新出现病原体的病毒。类似于其他分段的阴茎RNA病毒,核蛋白(NP)是病毒生命周期的主要作用者是(i)L蛋白中存在的聚合酶的必要副因子,(ii)的最后一行通过物理隐藏其在细胞质中的存在来防御病毒基因组(VRNA)。 NP也是干扰免疫系统的主要球员之一。 NP的几项结构研究表明,它具有两个结构域:其N-末端的球状RNA结合结构域(NP核心)和其C末端的外切核酸酶域(外显子)。进一步的研究已经观察到,RNA封装需要显着的构象变化。在本次审查中,与其他核蛋白相比,我们重新审视了NP上可用的最新结构和功能数据,并探讨了结构和功能含义。我们审查了NP-NP绑定模式中涉及的各种结构主题扩展。我们还评估了NP互乱的主要功能影响以及外显子的作用,从而使NP成为未来疫苗和抗病毒治疗的选择的目标。

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