The respiratory syncytial virus nucleoprotein-RNA complex forms a left-handed helical nucleocapsid.

The respiratory syncytial virus nucleoprotein-RNA complex forms a left-handed helical nucleocapsid.
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呼吸综合病毒核蛋白-RNA复合物形成左手螺旋核蛋白酶。

DOI:
10.1099/vir.0.053025-0
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发表时间:
2013-08
期刊:
The Journal of general virology
影响因子:
--
通讯作者:
Bhella D
Bhella D
中科院分区:
其他
文献类型:
--
作者:
Bakker SE;Duquerroy S;Galloux M;Loney C;Conner E;Eléouët JF;Rey FA;Bhella D

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呼吸道合胞病毒(Respiratory syncytial virus,RSV)是一种重要的人类病原体。它的核衣壳(NC)由病毒核蛋白N包被的负义RNA病毒基因组组成,是作为mRNA合成和基因组复制的模板的关键组装体。我们之前已经描述了NC样结构的X射线结构:由N-RNA形成的十聚体环,模拟螺旋NC的一圈。在缺乏实验数据的情况下,我们假设NC螺旋是右旋的,因为环中的N-N接触似乎更容易适应这种构象。我们现在明确地表明RSV NC是左手螺旋。我们进一步表明,在环中的接触可以被扭曲,以保持关键的N-N-蛋白质的相互作用,在左手螺旋,并讨论所产生的原子模型的螺旋NC病毒复制和转录的影响。
Respiratory syncytial virus (RSV) is an important human pathogen. Its nucleocapsid (NC), which comprises the negative sense RNA viral genome coated by the viral nucleoprotein N, is a critical assembly that serves as template for both mRNA synthesis and genome replication. We have previously described the X-ray structure of an NC-like structure: a decameric ring formed of N-RNA that mimics one turn of the helical NC. In the absence of experimental data we had hypothesized that the NC helix would be right-handed, as the N–N contacts in the ring appeared to more easily adapt to that conformation. We now unambiguously show that the RSV NC is a left-handed helix. We further show that the contacts in the ring can be distorted to maintain key N–N-protein interactions in a left-handed helix, and discuss the implications of the resulting atomic model of the helical NC for viral replication and transcription.
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