Simian virus 40 late transcripts lacking excisable intervening sequences are defective in both stability in the nucleus and transport to the cytoplasm

W. S. Ryu, J. E. Mertz

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

Little or no simian virus 40 (SV40) late mRNA accumulates in the cytoplasm when the primary transcript lacks an excisable intervening sequence. To begin to understand why, we analyzed the synthesis, processing, transport, and stability of SV40 late transcripts accumulated in the nucleus and cytoplasm of monkey cells cotransfected with the DNAs of wild-type and mutants of SV40 lacking precisely various introns. The data from these experiments indicated that (i) the presence of excisable intervening sequences in SV40 late transcripts is necessary for efficient accumulation in the cytoplasm of any of the SV40 late RNA species and (ii) SV40 late transcripts lacking excisable intervening sequences are defective in both stability in the nucleus and transport to the cytoplasm but not in stability in the cytoplasm. We hypothesize that SV40 late transcripts need to be processed via a pathway that couples stabilization of the primary transcript within the nucleus, excision of intervening sequences, proper 5'- and 3'-end formation, and transport to the cytoplasm.

Original languageEnglish
Pages (from-to)4386-4394
Number of pages9
JournalJournal of Virology
Volume63
Issue number10
DOIs
Publication statusPublished - 1989

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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