Role of the RNA recognition motif of the E1B 55kDa protein in the adenovirus type 5 infectious cycle

Sayuri E.M. Kato, Wenying Huang, S. J. Flint

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Although the adenovirus type 5 (Ad5) E1B 55. kDa protein can bind to RNA in vitro, no UV-light-induced crosslinking of this E1B protein to RNA could be detected in infected cells, under conditions in which RNA binding by a known viral RNA-binding protein (the L4 100. kDa protein) was observed readily. Substitution mutations, including substitutions reported to inhibit RNA binding in vitro, did not impair synthesis of viral early or late proteins or alter significantly the efficiency of viral replication in transformed or normal human cells. However, substitutions of conserved residues in the C-terminal segment of an RNA recognition motif specifically inhibited degradation of Mre11. We conclude that, if the E1B 55. kDa protein binds to RNA in infected cells in the same manner as in in vitro assays, this activity is not required for such well established functions as induction of selective export of viral late mRNAs.

Original languageEnglish (US)
Pages (from-to)9-17
Number of pages9
JournalVirology
Volume417
Issue number1
DOIs
StatePublished - Aug 15 2011

All Science Journal Classification (ASJC) codes

  • Virology

Keywords

  • Adenovirus E1B 55kDa protein
  • RNA binding
  • RNA recognition motif

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