Comprehensive in vivo secondary structure of the SARS-CoV-2 genome reveals novel regulatory motifs and mechanisms.

Comprehensive in vivo secondary structure of the SARS-CoV-2 genome reveals novel regulatory motifs and mechanisms.
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SARS-CoV-2基因组的全面体内二级结构揭示了新的调控基序和机制。

DOI:
10.1016/j.molcel.2020.12.041
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发表时间:
2021-02-04
期刊:
影响因子:
16
通讯作者:
Pyle AM
Pyle AM
中科院分区:
生物学1区
文献类型:
--
作者:
Huston NC;Wan H;Strine MS;de Cesaris Araujo Tavares R;Wilen CB;Pyle AM

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严重急性呼吸综合征相关冠状病毒2(SARS-CoV-2)是导致2019冠状病毒病(COVID-19)的正义RNA病毒。SARS-CoV-2的基因组在病毒RNA中是独特的,因为它具有形成RNA结构的巨大潜力,但其30种内切酶中有多达97%尚未进行结构研究。在这里,我们应用一种新的长扩增子策略,以确定在感染细胞中的单核苷酸分辨率的SARS-CoV-2 RNA基因组的二级结构。我们深入的结构分析揭示了整个Orf 1ab中折叠良好的RNA结构网络,并揭示了SARS-CoV-2基因组结构的各个方面,这些方面将其与其他RNA病毒区分开来。进化分析表明,SARS-CoV-2基因组结构的几个特征在β-冠状病毒中是保守的,我们确定了折叠良好的RNA结构区域,这些区域值得进行下游功能分析。本文提供的SARS-CoV-2的天然二级结构是一个路线图,将促进对病毒生命周期的重点研究,促进引物设计,并指导针对COVID-19的RNA药物靶点的鉴定。使用基于细胞的化学探测,休士顿等人。提供了实验确定的感染细胞中SARS-CoV-2 RNA基因组的结构图。该图谱揭示了在其他冠状病毒中保守的折叠良好的RNA结构网络。破坏这些结构会抑制SARS-CoV-2的生长。
Severe-acute-respiratory-syndrome-related coronavirus 2 (SARS-CoV-2) is the positive-sense RNA virus that causes coronavirus disease 2019 (COVID-19). The genome of SARS-CoV-2 is unique among viral RNAs in its vast potential to form RNA structures, yet as much as 97% of its 30 kilobases have not been structurally explored. Here, we apply a novel long amplicon strategy to determine the secondary structure of the SARS-CoV-2 RNA genome at single-nucleotide resolution in infected cells. Our in-depth structural analysis reveals networks of well-folded RNA structures throughout Orf1ab and reveals aspects of SARS-CoV-2 genome architecture that distinguish it from other RNA viruses. Evolutionary analysis shows that several features of the SARS-CoV-2 genomic structure are conserved across β-coronaviruses, and we pinpoint regions of well-folded RNA structure that merit downstream functional analysis. The native, secondary structure of SARS-CoV-2 presented here is a roadmap that will facilitate focused studies on the viral life cycle, facilitate primer design, and guide the identification of RNA drug targets against COVID-19. Using cell-based chemical probing, Huston et al. provide an experimentally determined structural map of the SARS-CoV-2 RNA genome in infected cells. The map reveals networks of well-folded RNA structures that are conserved in other coronaviruses. Disruption of these structures inhibits SARS-CoV-2 growth.
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