The architecture of the SARS-CoV-2 RNA genome inside virion

The architecture of the SARS-CoV-2 RNA genome inside virion
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病毒粒子内 SARS-CoV-2 RNA 基因组的结构

DOI:
10.21203/rs.3.rs-132578/v1
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发表时间:
2020-12
影响因子:
16.6
通讯作者:
Xue Yuanchao
Xue Yuanchao
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Cao Changchang;Cai Zhaokui;Xiao Xia;Rao Jian;Chen Juan;Hu Naijing;Yang Minnan;Xing Xiaorui;Wang Yongle;Li Manman;Zhou Bing;Wang Xiangxi;Wang Jianwei;Xue Yuanchao

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SARS-CoV-2携带最大的单链RNA基因组,是正在进行的COVID-19大流行的病原体。SARS-CoV-2 RNA基因组如何在病毒体中折叠仍然未知。为了填补知识空白,促进基于结构的药物开发,我们开发了一种病毒体RNA原位构象测序技术,命名为vRIC-seq,用于无偏地探测病毒RNA基因组结构。使用vRIC-seq数据,我们重建了SARS-CoV-2基因组的三级结构,并揭示了令人惊讶的“未纠缠的小球”构象。我们发现了许多长距离双链体和高阶连接,这两者都在纯化选择下,并有助于SARS-CoV-2基因组的顺序包装。出乎意料的是,D 614 G和其他两个伴随的突变可能会将双链体重塑为更稳定的形式。最后,有效的小干扰RNA的结构指导设计可以消除非洲绿猴肾细胞中的SARS-CoV-2。总的来说,我们的工作为研究新出现的致命RNA病毒的基因组结构、功能和动力学提供了一个框架。SARS-CoV-2基因组的二级结构和长距离RNA相互作用已经通过各种测序方法进行了研究。在这里,作者使用RNA-RNA杂交测序方法来预测病毒体中SRAS-CoV-2 RNA基因组的二级和三级结构。
SARS-CoV-2 carries the largest single-stranded RNA genome and is the causal pathogen of the ongoing COVID-19 pandemic. How the SARS-CoV-2 RNA genome is folded in the virion remains unknown. To fill the knowledge gap and facilitate structure-based drug development, we develop a virion RNA in situ conformation sequencing technology, named vRIC-seq, for probing viral RNA genome structure unbiasedly. Using vRIC-seq data, we reconstruct the tertiary structure of the SARS-CoV-2 genome and reveal a surprisingly “unentangled globule” conformation. We uncover many long-range duplexes and higher-order junctions, both of which are under purifying selections and contribute to the sequential package of the SARS-CoV-2 genome. Unexpectedly, the D614G and the other two accompanying mutations may remodel duplexes into more stable forms. Lastly, the structure-guided design of potent small interfering RNAs can obliterate the SARS-CoV-2 in Vero cells. Overall, our work provides a framework for studying the genome structure, function, and dynamics of emerging deadly RNA viruses. Secondary structures and long-range RNA interactions of the SARS-CoV-2 genome have been investigated by various sequencing methods. Here the authors use an RNA-RNA hybrid sequencing method to predict the secondary and tertiary structure of the SRAS-CoV-2 RNA genome in the virion.
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