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The severe acute respiratory syndrome-coronavirus replicative protein nsp9 is a single-stranded RNA-binding subunit unique in the RNA virus world

Abstract : The recently identified etiological agent of the severe acute respiratory syndrome (SARS) belongs to Coronaviridae (CoV), a family of viruses replicating by a poorly understood mechanism. Here, we report the crystal structure at 2.7-A resolution of nsp9, a hitherto uncharacterized subunit of the SARS-CoV replicative polyproteins. We show that SARS-CoV nsp9 is a single-stranded RNA-binding protein displaying a previously unreported, oligosaccharide/oligonucleotide fold-like fold. The presence of this type of protein has not been detected in the replicative complexes of RNA viruses, and its presence may reflect the unique and complex CoV viral replication/transcription machinery.
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https://hal.archives-ouvertes.fr/hal-02459257
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Submitted on : Wednesday, January 29, 2020 - 11:52:47 AM
Last modification on : Monday, February 21, 2022 - 3:10:03 PM

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Marie-Pierre Egloff, Francois Ferron, Valérie Campanacci, Sonia Longhi, Corinne Rancurel, et al.. The severe acute respiratory syndrome-coronavirus replicative protein nsp9 is a single-stranded RNA-binding subunit unique in the RNA virus world. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2004, 101 (11), pp.3792-3796. ⟨10.1073/pnas.0307877101⟩. ⟨hal-02459257⟩

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