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Adenovirus VAI RNA prevents phosphorylation of the eukaryotic initiation factor 2 alpha subunit subsequent to infection.

By R J Schneider, B Safer, S M Munemitsu, C E Samuel and T Shenk

Abstract

The virus-associated VAI RNA of adenovirus is a small, RNA polymerase III-transcribed species required for efficient translation of mRNAs late after infection. Deletion mutant dl331 fails to produce this RNA and, as a result, grows poorly. Three lines of evidence suggest that VAI RNA facilitates translation by preventing inactivation of the function of eukaryotic initiation factor 2 (eIF-2). First, the mutant's translational defect can be relieved by addition of eIF-2 or eIF-2B (GTP recycling factor). Second, extracts of mutant-infected cells exhibit enhanced protein P1/eIF-2 alpha subunit kinase activity. Third, dl331 can grow with nearly normal kinetics in cells that do not express the kinase

Topics: Research Article
Year: 1985
DOI identifier: 10.1073/pnas.82.13.4321
OAI identifier: oai:pubmedcentral.nih.gov:390405
Provided by: PubMed Central
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