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. 1988 Jun;85(12):4257–4261. doi: 10.1073/pnas.85.12.4257

Avian reovirus mRNAs are nonfunctional in infected mouse cells: translational basis for virus host-range restriction.

J Benavente 1, A J Shatkin 1
PMCID: PMC280406  PMID: 3380790

Abstract

Avian reovirus S1133 penetrates and uncoats in suspension cultures of mouse L cells. The multiple species of viral transcripts are produced in the cytoplasm of the infected cell, but they fail to associate with polysomes, consistent with the absence of viral protein synthesis. The selective block in avian virus mRNA translation is not overcome by coinfection with mammalian reovirus type 3, which replicates in mouse L cells, or by hypertonic shock or exposure to a low concentration of cycloheximide. Although the avian viral transcripts are inactive in vivo, RNA extracted from infected, nonpermissive L cells directs the synthesis of a normal spectrum of viral proteins in rabbit reticulocyte lysates. These results indicate that avian viral transcription is not restricted in mouse cells and that viral replication is prevented at the level of initiation of protein synthesis.

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