Global analysis of polysome-associated mRNA in vesicular stomatitis virus infected cells

William J. Neidermyer, Sean P.J. Whelan

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Infection of mammalian cells with vesicular stomatitis virus (VSV) results in the inhibition of cellular translation while viral translation proceeds efficiently. VSV RNA synthesis occurs entirely within the cytoplasm, where during transcription the viral polymerase produces 5 mRNAs that are structurally indistinct to cellular mRNAs with respect to their 50 cap-structure and 30-polyadenylate tail. Using the global approach of massively parallel sequencing of total cytoplasmic, monosome-and polysome-associated mRNA, we interrogate the impact of VSV infection of HeLa cells on translation. Analysis of sequence reads in the different fractions shows >60% of total cytoplasmic and polysome-associated reads map to the 5 viral genes by 6 hours post-infection, a time point at which robust host cell translational shutoff is observed. Consistent with an overwhelming abundance of viral mRNA in the polysome fraction, the reads mapping to cellular genes were reduced. The cellular mRNAs that remain most polysome-associated following infection had longer half-lives, were typically larger, and were more AU rich, features that are shared with the viral mRNAs. Several of those mRNAs encode proteins known to positively affect viral replication, and using chemical inhibition and siRNA depletion we confirm that the host chaperone heat shock protein 90 (hsp90) and eukaryotic translation initiation factor 3A (eIF3A)—encoded by 2 such mRNAs —support viral replication. Correspondingly, regulated in development and DNA damage 1 (Redd1) encoded by a host mRNA with reduced polysome association inhibits viral infection. These data underscore the importance of viral mRNA abundance in the shut-off of host translation in VSV infected cells and link the differential translatability of some cellular mRNAs with pro-or antiviral function.

Original languageEnglish
Article numbere1007875
JournalPLoS pathogens
Volume15
Issue number6
DOIs
StatePublished - Jun 2019

Fingerprint

Dive into the research topics of 'Global analysis of polysome-associated mRNA in vesicular stomatitis virus infected cells'. Together they form a unique fingerprint.

Cite this