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Nucleic Acids Research, 1979, Vol. 7, No. 6 1405-1418
© 1979

Articles

A DRB (5,6 dichloro-ß-D-ribofuranosyIbenzimidazole)-resistant adenovirus mRNA

Björn Vennström*, Hikan Persson, Ulf Pettersson and Lennart Philipson

Department of Microbiology, Biomedical Center, Uppsala University Uppsala, Sweden

Received September 21, 1979.

5,6-Dichloro-ß-D ribofuranosyl benzimidazole (DRB) inhibitis transcription from the major late adenovirus promoter, located on the r-strand at map position 16.3 on the viral genome. 100–500 nucleotides long RNA chains with capped 5'-termini are transcribed from this promoter in the presence of 70 µM DRB. Synthesis of the mRNA for polypeptide IX which is unspliced and maps on the r-strand between positions 9.7 and 10.9 appears, however, to be DRB-resistant although it is transcribed by polymerase II and capped. Translatable mRNA for polypeptide IX is synthesized in the presence of DRB while the mRNAs for the other viral structural proteins are not synthesized. This differential DRB-inhibition of polymerase II transcription suggests either that short mRNAs may escape inhibition or that unapliced mRNAs are insensitive to the drug.

*Present address: Department of Microbiology, University of California, San Francisco, CA 94114, USA


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