Abstract:CpG dinucleotides are under-represented in the genomes of most RNA viruses. Synonymously increasing CpG content of a range of RNA viruses reliably causes replication defects due to the recognition of CpG motifs in RNA by cellular Zinc-finger Antiviral Protein (ZAP). Prior to the discovery of ZAP as a CpG sensor, we described an engineered influenza A virus (IAV) enriched for CpGs in segment 5 that displays the expected replication defects. However, we report here that this CpG-high (CpGH) mutant is not attenua… Show more
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