PMID- 1321714 OWN - NLM STAT- MEDLINE DCOM- 19920825 LR - 20190620 IS - 0014-2956 (Print) IS - 0014-2956 (Linking) VI - 207 IP - 2 DP - 1992 Jul 15 TI - Dependence of the adenovirus tripartite leader on the p220 subunit of eukaryotic initiation factor 4F during in vitro translation. Effect of p220 cleavage by foot-and-mouth-disease-virus L-protease on in vitro translation. PG - 471-7 AB - The adenovirus tripartite leader (TPT) 5' untranslated region (5'UTR) allows translation in poliovirus-infected cells, in which the p220 subunit of eukaryotic initiation factor 4F is degraded. This p220-independent translation was investigated by measuring in vitro translation in a reticulocyte lysate of a reporter gene, chloramphenicol acetyltransferase, coupled to the TPT 5'UTR. The p220 subunit was degraded by translation of a foot-and-mouth-disease L-protease construct. Surprisingly, the TPT 5'UTR was dependent on intact p220, as are other naturally capped mRNA species. Translation of encephalomyocarditis virus RNA was p220 independent, as expected from its ability to support internal, cap-independent initiation. In vitro protein-synthesis experiments with purified initiation factors confirmed the dependence of TPT mRNA translation on eukaryotic initiation factor 4F. The relationship between adenovirus TPT-5'UTR-directed translation and poliovirus-induced host cell shut-off is discussed. FAU - Thomas, A A AU - Thomas AA AD - Department of Molecular Cell Biology, University of Utrecht, The Netherlands. FAU - Scheper, G C AU - Scheper GC FAU - Kleijn, M AU - Kleijn M FAU - De Boer, M AU - De Boer M FAU - Voorma, H O AU - Voorma HO LA - eng PT - Journal Article PL - England TA - Eur J Biochem JT - European journal of biochemistry JID - 0107600 RN - 0 (Eukaryotic Initiation Factor-4F) RN - 0 (Macromolecular Substances) RN - 0 (Peptide Initiation Factors) RN - 0 (RNA Caps) RN - 0 (RNA, Viral) RN - EC 3.4.- (Endopeptidases) SB - IM MH - Adenoviridae/*genetics MH - Animals MH - Aphthovirus/enzymology MH - Cell-Free System MH - Endopeptidases/metabolism MH - Eukaryotic Initiation Factor-4F MH - *Gene Expression Regulation, Viral MH - In Vitro Techniques MH - Macromolecular Substances MH - *Peptide Chain Initiation, Translational MH - Peptide Initiation Factors/*metabolism/ultrastructure MH - RNA Caps MH - RNA, Viral/*genetics MH - Rabbits EDAT- 1992/07/15 00:00 MHDA- 1992/07/15 00:01 CRDT- 1992/07/15 00:00 PHST- 1992/07/15 00:00 [pubmed] PHST- 1992/07/15 00:01 [medline] PHST- 1992/07/15 00:00 [entrez] AID - 10.1111/j.1432-1033.1992.tb17073.x [doi] PST - ppublish SO - Eur J Biochem. 1992 Jul 15;207(2):471-7. doi: 10.1111/j.1432-1033.1992.tb17073.x.