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• W3182080654 abstract "The coronavirus disease 2019 pandemic caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is an ongoing global public crisis. Although viral RNA modification has been reported based on the transcriptome architecture, the types and functions of RNA modification are still unknown. In this study, we evaluated the roles of RNA N6-methyladenosine (m6A) modification in SARS-CoV-2. Our methylated RNA immunoprecipitation sequencing (MeRIP-Seq) and Nanopore direct RNA sequencing (DRS) analysis showed that SARS-CoV-2 RNA contained m6A modification. Moreover, SARS-CoV-2 infection not only increased the expression of methyltransferase-like 3 (METTL3) but also altered its distribution. Modification of METTL3 expression by short hairpin RNA or plasmid transfection for knockdown or overexpression, respectively, affected viral replication. Furthermore, the viral key protein RdRp interacted with METTL3, and METTL3 was distributed in both the nucleus and cytoplasm in the presence of RdRp. RdRp appeared to modulate the sumoylation and ubiquitination of METTL3 via an unknown mechanism. Taken together, our findings demonstrated that the host m6A modification complex interacted with viral proteins to modulate SARS-CoV-2 replication. IMPORTANCE Internal chemical modifications of viral RNA play key roles in the regulation of viral replication and gene expression. Although potential internal modifications have been reported in SARS-CoV-2 RNA, the function of the SARS-CoV-2 N6-methyladenosine (m6A) modification in the viral life cycle is unclear. In the current study, we demonstrated that SARS-CoV-2 RNA underwent m6A modification by host m6A machinery. SARS-CoV-2 infection altered the expression pattern of methyltransferases and demethylases, while the expression level of methyltransferase-like 3 (METTL3) and fat mass and obesity-associated protein (FTO) was linked to the viral replication. Further study showed that METTL3 interacted with viral RNA polymerase RNA-dependent RNA polymerase (RdRp), which influenced not only the distribution but also the posttranslational modification of METTL3. Our study provided evidence that host m6A components interacted with viral proteins to modulate viral replication." @default.
• W3182080654 created "2021-07-19" @default.
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• W3182080654 date "2021-08-31" @default.
• W3182080654 modified "2023-10-11" @default.
• W3182080654 title "Methyltransferase-like 3 Modulates Severe Acute Respiratory Syndrome Coronavirus-2 RNA N6-Methyladenosine Modification and Replication" @default.
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• W3182080654 doi "https://doi.org/10.1128/mbio.01067-21" @default.
• W3182080654 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8437041" @default.
• W3182080654 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34225491" @default.
• W3182080654 hasPublicationYear "2021" @default.
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