Abstract
The full-length gene product encoded by the E2 open reading frame (ORF) of bovine papillomavirus type 1 (BPV1) is a transcriptional transactivator. It is believed to mediate its effect on the BPV1 long control region (LCR) by binding to motifs with the consensus sequence ACCN6GGT. The minimal functional cis active site, called the E2 response element (E2RE), in mammalian cells comprises two copies of this motif. Here we have shown that E2 can function in Saccharomyces cerevisiae by placing an E2RE upstream of a synthetic yeast assay promoter which consists of a TATA motif and an mRNA initiation site, spaced correctly. This E2RE-minimal promoter is only transcriptionally active in the presence of E2 protein and the resulting mRNA is initiated at the authentic start site. This is the first report of a mammalian viral transactivator functioning in yeast. The level of activation by E2 via the E2RE was the same as observed with the highly efficient authentic PGK promoter where the upstream activation sequence is composed of three distinct elements. Furthermore a single E2 motif which is insufficient in mammalian cells as an activation site was as efficiently utilized in yeast as the E2RE (2 motifs). Previous studies have shown that mammalian cellular activators can function in yeast and our data now extend this to viral-specific activators. Our data indicate however that while the mechanism of transactivation is broadly conserved there may be significant differences at the detailed level.
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Chambers A., Stanway C., Kingsman A. J., Kingsman S. M. The UAS of the yeast PGK gene is composed of multiple functional elements. Nucleic Acids Res. 1988 Sep 12;16(17):8245–8260. doi: 10.1093/nar/16.17.8245. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dobson M. J., Mellor J., Fulton A. M., Roberts N. A., Bowen B. A., Kingsman S. M., Kingsman A. J. The identification and high level expression of a protein encoded by the yeast Ty element. EMBO J. 1984 May;3(5):1115–1119. doi: 10.1002/j.1460-2075.1984.tb01938.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fischer J. A., Giniger E., Maniatis T., Ptashne M. GAL4 activates transcription in Drosophila. Nature. 1988 Apr 28;332(6167):853–856. doi: 10.1038/332853a0. [DOI] [PubMed] [Google Scholar]
- Freedman L. P., Luisi B. F., Korszun Z. R., Basavappa R., Sigler P. B., Yamamoto K. R. The function and structure of the metal coordination sites within the glucocorticoid receptor DNA binding domain. Nature. 1988 Aug 11;334(6182):543–546. doi: 10.1038/334543a0. [DOI] [PubMed] [Google Scholar]
- Harrison S. M., Gearing K. L., Kim S. Y., Kingsman A. J., Kingsman S. M. Multiple cis-active elements in the long control region of bovine papillomavirus type 1 (BPV-1). Nucleic Acids Res. 1987 Dec 23;15(24):10267–10284. doi: 10.1093/nar/15.24.10267. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hinnen A., Hicks J. B., Fink G. R. Transformation of yeast. Proc Natl Acad Sci U S A. 1978 Apr;75(4):1929–1933. doi: 10.1073/pnas.75.4.1929. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Holm C., Meeks-Wagner D. W., Fangman W. L., Botstein D. A rapid, efficient method for isolating DNA from yeast. Gene. 1986;42(2):169–173. doi: 10.1016/0378-1119(86)90293-3. [DOI] [PubMed] [Google Scholar]
- Kim S., Mellor J., Kingsman A. J., Kingsman S. M. Multiple control elements in the TRP1 promoter of Saccharomyces cerevisiae. Mol Cell Biol. 1986 Dec;6(12):4251–4258. doi: 10.1128/mcb.6.12.4251. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kumar V., Green S., Stack G., Berry M., Jin J. R., Chambon P. Functional domains of the human estrogen receptor. Cell. 1987 Dec 24;51(6):941–951. doi: 10.1016/0092-8674(87)90581-2. [DOI] [PubMed] [Google Scholar]
- Landschulz W. H., Johnson P. F., McKnight S. L. The leucine zipper: a hypothetical structure common to a new class of DNA binding proteins. Science. 1988 Jun 24;240(4860):1759–1764. doi: 10.1126/science.3289117. [DOI] [PubMed] [Google Scholar]
- Ma J., Przibilla E., Hu J., Bogorad L., Ptashne M. Yeast activators stimulate plant gene expression. Nature. 1988 Aug 18;334(6183):631–633. doi: 10.1038/334631a0. [DOI] [PubMed] [Google Scholar]
- McBride A. A., Schlegel R., Howley P. M. The carboxy-terminal domain shared by the bovine papillomavirus E2 transactivator and repressor proteins contains a specific DNA binding activity. EMBO J. 1988 Feb;7(2):533–539. doi: 10.1002/j.1460-2075.1988.tb02842.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mellor J., Dobson M. J., Roberts N. A., Tuite M. F., Emtage J. S., White S., Lowe P. A., Patel T., Kingsman A. J., Kingsman S. M. Efficient synthesis of enzymatically active calf chymosin in Saccharomyces cerevisiae. Gene. 1983 Sep;24(1):1–14. doi: 10.1016/0378-1119(83)90126-9. [DOI] [PubMed] [Google Scholar]
- Ogden J. E., Stanway C., Kim S., Mellor J., Kingsman A. J., Kingsman S. M. Efficient expression of the Saccharomyces cerevisiae PGK gene depends on an upstream activation sequence but does not require TATA sequences. Mol Cell Biol. 1986 Dec;6(12):4335–4343. doi: 10.1128/mcb.6.12.4335. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sadowski I., Ma J., Triezenberg S., Ptashne M. GAL4-VP16 is an unusually potent transcriptional activator. Nature. 1988 Oct 6;335(6190):563–564. doi: 10.1038/335563a0. [DOI] [PubMed] [Google Scholar]
- Southern E. M. Detection of specific sequences among DNA fragments separated by gel electrophoresis. J Mol Biol. 1975 Nov 5;98(3):503–517. doi: 10.1016/s0022-2836(75)80083-0. [DOI] [PubMed] [Google Scholar]
- Stanway C., Mellor J., Ogden J. E., Kingsman A. J., Kingsman S. M. The UAS of the yeast PGK gene contains functionally distinct domains. Nucleic Acids Res. 1987 Sep 11;15(17):6855–6873. doi: 10.1093/nar/15.17.6855. [DOI] [PMC free article] [PubMed] [Google Scholar]