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The architecture of the SARS-CoV-2 RNA genome inside virion
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Journal Article
The architecture of the SARS-CoV-2 RNA genome inside virion
2021
Overview
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.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
