Vaccinia virus protein A3 is required for the production of normal immature virions and for the encapsidation of the nucleocapsid protein L4.

Vaccinia virus protein A3 is required for the production of normal immature virions and for the encapsidation of the nucleocapsid protein L4.
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DOI:
10.1016/j.virol.2015.02.020
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发表时间:
2015-07
期刊:
影响因子:
3.7
通讯作者:
Condit, Richard C.
Condit, Richard C.
中科院分区:
医学3区
文献类型:
--
作者:
Jesus, Desyree Murta;Moussatche, Nissin;McFadden, Baron B. D.;Nielsen, Casey Paulasue;D'Costa, Susan M.;Condit, Richard C.

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牛痘病毒粒子的成熟是一个复杂的过程,其导致未成熟病毒粒子中所含的病毒质组织成成熟颗粒中观察到的侧体、核心壁和核衣壳。目前还不清楚这种组织是如何发生的,对突变体的研究对于理解这一过程是必不可少的。通过表征A3L基因中的诱导突变体,我们发现,A3,一种内核壁蛋白,对于正常未成熟病毒的形成以及核衣壳蛋白L4的正确定位是重要的。在不存在A3的情况下,L4在病毒工厂中不积累,并且在不含A3的颗粒中不发生沉淀。这些数据加强了我们先前提出的假设,即A3和L4相互作用,这种相互作用对于核心壁和核衣壳的正确形成至关重要。
Maturation of the vaccinia virion is an intricate process that results in the organization of the viroplasm contained in immature virions into the lateral bodies, core wall and nucleocapsid observed in the mature particles. It is unclear how this organization takes place and studies with mutants are indispensable in understanding this process. By characterizing an inducible mutant in the A3L gene, we revealed that A3, an inner core wall protein, is important for formation of normal immature viruses and also for the correct localization of L4, a nucleocapsid protein. L4 did not accumulate in the viral factories in the absence of A3 and was not encapsidated in the particles that do not contain A3. These data strengthen our previously suggested hypothesis that A3 and L4 interact and that this interaction is critical for proper formation of the core wall and nucleocapsid.
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