The eukaryotic translation initiation factor 4E is not modified during the course of vaccinia virus replication.

Published

Journal Article

The ability of vaccinia virus to inhibit processes of cap-dependent translational initiation by inactivating the eukaryotic translation initiation factor 4E (eIF-4E) has been examined. Analyses of the quantities of eIF-4E present in either uninfected mouse L929 cells or vaccinia virus-infected cells showed that during the first 12 hr of virus replication, when there is a marked decrease in host gene expression in infected cells, there is no change in the total amount of eIF-4E present. Analyses of eIF-4E that was metabolically labeled with [32P] and then purified by affinity chromatography using m7GTP-Sepharose 4B, indicated that neither the incorporation of radiolabel into eIF-4E nor the amounts of eIF-4E capable of binding to cap structures changed significantly during virus replication. Immunodetection of phosphorylated and unphosphorylated eIF-4E in cell lysates fractionated by two-dimensional gel electrophoresis showed that the steady-state levels of phosphorylated and unphosphorylated forms of eIF-4E were similar in uninfected and virus-infected cells. These results suggest that vaccinia virus does not gain preferential translation of viral mRNAs over other mRNAs in the cell by reducing either eIF-4E phosphorylation or its ability to bind to the cap structure.

Full Text

Duke Authors

Cited Authors

  • Gierman, TM; Frederickson, RM; Sonenberg, N; Pickup, DJ

Published Date

  • June 1992

Published In

Volume / Issue

  • 188 / 2

Start / End Page

  • 934 - 937

PubMed ID

  • 1585661

Pubmed Central ID

  • 1585661

Electronic International Standard Serial Number (EISSN)

  • 2514-4138

International Standard Serial Number (ISSN)

  • 1096-0341

Digital Object Identifier (DOI)

  • 10.1016/0042-6822(92)90557-6

Language

  • eng