Characterization of the Ebola virus nucleoprotein-RNA complex.

Characterization of the Ebola virus nucleoprotein-RNA complex.
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埃博拉病毒核蛋白-RNA复合物的表征。

DOI:
10.1099/vir.0.019794-0
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发表时间:
2010-06
影响因子:
3.8
通讯作者:
Kawaoka, Yoshihiro
Kawaoka, Yoshihiro
中科院分区:
医学3区
文献类型:
--
作者:
Noda, Takeshi;Hagiwara, Kyoji;Sagara, Hiroshi;Kawaoka, Yoshihiro

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当埃博拉病毒核蛋白(NP)在哺乳动物细胞中表达时,它会组装成螺旋结构。本研究从表达NP的细胞中纯化的重组NP螺旋进行了生化和形态学表征。我们发现重组NP螺旋与非病毒RNA相关,而非病毒RNA不受RNA酶酶切的保护,并且螺旋的形态随环境盐浓度的变化而变化。NP的n端450 aa残基足以满足这些性质。然而,NP相关RNA的消化消除了螺旋的可塑性,这表明该RNA是螺旋的重要结构组成部分,通过n端450aa与单个NP分子结合。这些发现增强了我们对埃博拉病毒组装的认识和对埃博拉病毒生命周期的理解。
When Ebola virus nucleoprotein (NP) is expressed in mammalian cells, it assembles into helical structures. Here, the recombinant NP helix purified from cells expressing NP was characterized biochemically and morphologically. We found that the recombinant NP helix is associated with non-viral RNA, which is not protected from RNase digestion and that the morphology of the helix changes depending on the environmental salt concentration. The N-terminal 450 aa residues of NP are sufficient for these properties. However, digestion of the NP-associated RNA eliminates the plasticity of the helix, suggesting that this RNA is an essential structural component of the helix, binding to individual NP molecules via the N-terminal 450 aa. These findings enhance our knowledge of Ebola virus assembly and understanding of the Ebola virus life cycle.
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发表时间: 1981-01-01
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