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. 1985 Jun;54(3):894–898. doi: 10.1128/jvi.54.3.894-898.1985

Double-stranded RNA-dependent protein kinase and 2-5A system are both activated in interferon-treated, encephalomyocarditis virus-infected HeLa cells.

A P Rice, R Duncan, J W Hershey, I M Kerr
PMCID: PMC254884  PMID: 2582150

Abstract

Activation of the interferon-inducible, double-stranded RNA-dependent protein kinase was monitored in monolayer cultures of control and interferon-treated HeLa cells infected with encephalomyocarditis virus. The extent of phosphorylation in the intact cell of the alpha-subunit of eucaryotic protein synthesis initiation factor eIF2 by the kinase was determined for the first time in this type of system, using a two-dimensional immunoblot technique. Virus protein synthesis and the kinetics of activation of the ppp(A2'p)nA (n greater than or equal to 2) system were analyzed in parallel. Enhanced phosphorylation of eIF2-alpha was obvious at 9 h and increased by 12 h postinfection. ppp(A2'p)nA and ppp(A2'p)nA-mediated rRNA cleavage were observed from 6 h. No viral protein synthesis was detected in cells in which a general inhibition of protein synthesis developed with time. It can be concluded that both the kinase and ppp(A2'p)nA system are active in interferon-treated, encephalomyocarditis virus-infected HeLa cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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