AI Article Synopsis
- SARS-CoV-2, the virus responsible for COVID-19, suppresses the immune system and harms cell function, with its ORF6 protein playing a key role in these effects.
- ORF6 inhibits the export of various RNA types by interfering with the RNA export factor RAE1 and its interactions with nuclear export receptors.
- The study reveals that ORF6 binds to RNA and forms oligomers, providing valuable insights for developing antiviral drugs aimed at targeting this protein to combat SARS-CoV-2 effects.
Article Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of coronavirus disease 19 (COVID-19). SARS-CoV-2 infection suppresses host innate immunity and impairs cell viability. Among the viral proteins, ORF6 exhibits potent interferon (IFN) antagonistic activity and cellular toxicity. It also interacts with the RNA export factor RAE1, which bridges the nuclear pore complex and nuclear export receptors, suggesting an effect on RNA export. Using the Xenopus oocyte microinjection system, I found that ORF6 blocked the export of not only mRNA but also spliceosomal U snRNA. I further demonstrated that ORF6 affects the interaction between RAE1 and nuclear export receptors and inhibits the RNA binding of RAE1. These effects of ORF6 may cumulatively block the export of several classes of RNA. I also found that ORF6 binds RNA and forms oligomers. These findings provide insights into the suppression of innate immune responses and the reduction in cell viability caused by SARS-CoV-2 infection, contributing to the development of antiviral drugs targeting ORF6.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11527279 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0312098 | PLOS |
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