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. 1994 Feb;68(2):1085–1093. doi: 10.1128/jvi.68.2.1085-1093.1994

The bovine papillomavirus type 1 (BPV1) replication protein E1 modulates transcriptional activation by interacting with BPV1 E2.

M A Le Moal 1, M Yaniv 1, F Thierry 1
PMCID: PMC236547  PMID: 8289338

Abstract

The study of bovine papillomavirus type 1 (BPV1) DNA replication has shown that E1 and E2 are the only viral proteins required for this process. Both E1 and E2 interact with the viral origin of replication (ori). The BPV1 E2 protein is also a well-characterized transcriptional regulator. We show in this report that E1 can modulate transcription by interactions with E2. At low concentrations, E1 enhanced the E2-mediated transactivation of heterologous promoters containing the BPV1 ori by promoting cooperative binding of both E1 and E2 to the DNA. In contrast, in the presence of excess E1, transactivation by E2 is repressed. This last process, however, does not require cooperative DNA binding of the two proteins. These results imply that the balance between these two distinct types of interaction is crucial both for control of replication and for early viral transcription.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Bernard B. A., Bailly C., Lenoir M. C., Darmon M., Thierry F., Yaniv M. The human papillomavirus type 18 (HPV18) E2 gene product is a repressor of the HPV18 regulatory region in human keratinocytes. J Virol. 1989 Oct;63(10):4317–4324. doi: 10.1128/jvi.63.10.4317-4324.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Blitz I. L., Laimins L. A. The 68-kilodalton E1 protein of bovine papillomavirus is a DNA binding phosphoprotein which associates with the E2 transcriptional activator in vitro. J Virol. 1991 Feb;65(2):649–656. doi: 10.1128/jvi.65.2.649-656.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Bream G. L., Ohmstede C. A., Phelps W. C. Characterization of human papillomavirus type 11 E1 and E2 proteins expressed in insect cells. J Virol. 1993 May;67(5):2655–2663. doi: 10.1128/jvi.67.5.2655-2663.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Chiang C. M., Ustav M., Stenlund A., Ho T. F., Broker T. R., Chow L. T. Viral E1 and E2 proteins support replication of homologous and heterologous papillomaviral origins. Proc Natl Acad Sci U S A. 1992 Jul 1;89(13):5799–5803. doi: 10.1073/pnas.89.13.5799. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Clertant P., Seif I. A common function for polyoma virus large-T and papillomavirus E1 proteins? Nature. 1984 Sep 20;311(5983):276–279. doi: 10.1038/311276a0. [DOI] [PubMed] [Google Scholar]
  6. Dostatni N., Lambert P. F., Sousa R., Ham J., Howley P. M., Yaniv M. The functional BPV-1 E2 trans-activating protein can act as a repressor by preventing formation of the initiation complex. Genes Dev. 1991 Sep;5(9):1657–1671. doi: 10.1101/gad.5.9.1657. [DOI] [PubMed] [Google Scholar]
  7. Dostatni N., Thierry F., Yaniv M. A dimer of BPV-1 E2 containing a protease resistant core interacts with its DNA target. EMBO J. 1988 Dec 1;7(12):3807–3816. doi: 10.1002/j.1460-2075.1988.tb03265.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Fried M., Crothers D. M. Equilibria and kinetics of lac repressor-operator interactions by polyacrylamide gel electrophoresis. Nucleic Acids Res. 1981 Dec 11;9(23):6505–6525. doi: 10.1093/nar/9.23.6505. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Gauthier J. M., Dostatni N., Lusky M., Yaniv M. Two DNA-bound E2 dimers are required for strong transcriptional activation and for cooperation with cellular factors in most cells. New Biol. 1991 May;3(5):498–509. [PubMed] [Google Scholar]
  10. Gill G., Ptashne M. Negative effect of the transcriptional activator GAL4. Nature. 1988 Aug 25;334(6184):721–724. doi: 10.1038/334721a0. [DOI] [PubMed] [Google Scholar]
  11. Giniger E., Ptashne M. Cooperative DNA binding of the yeast transcriptional activator GAL4. Proc Natl Acad Sci U S A. 1988 Jan;85(2):382–386. doi: 10.1073/pnas.85.2.382. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Ham J., Dostatni N., Arnos F., Yaniv M. Several different upstream promoter elements can potentiate transactivation by the BPV-1 E2 protein. EMBO J. 1991 Oct;10(10):2931–2940. doi: 10.1002/j.1460-2075.1991.tb07843.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Hawley-Nelson P., Androphy E. J., Lowy D. R., Schiller J. T. The specific DNA recognition sequence of the bovine papillomavirus E2 protein is an E2-dependent enhancer. EMBO J. 1988 Feb;7(2):525–531. doi: 10.1002/j.1460-2075.1988.tb02841.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. He Z., Brinton B. T., Greenblatt J., Hassell J. A., Ingles C. J. The transactivator proteins VP16 and GAL4 bind replication factor A. Cell. 1993 Jun 18;73(6):1223–1232. doi: 10.1016/0092-8674(93)90650-f. [DOI] [PubMed] [Google Scholar]
  15. Hirt B. Selective extraction of polyoma DNA from infected mouse cell cultures. J Mol Biol. 1967 Jun 14;26(2):365–369. doi: 10.1016/0022-2836(67)90307-5. [DOI] [PubMed] [Google Scholar]
  16. Ikegami S., Taguchi T., Ohashi M., Oguro M., Nagano H., Mano Y. Aphidicolin prevents mitotic cell division by interfering with the activity of DNA polymerase-alpha. Nature. 1978 Oct 5;275(5679):458–460. doi: 10.1038/275458a0. [DOI] [PubMed] [Google Scholar]
  17. Lambert P. F., Howley P. M. Bovine papillomavirus type 1 E1 replication-defective mutants are altered in their transcriptional regulation. J Virol. 1988 Nov;62(11):4009–4015. doi: 10.1128/jvi.62.11.4009-4015.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Li R., Botchan M. R. The acidic transcriptional activation domains of VP16 and p53 bind the cellular replication protein A and stimulate in vitro BPV-1 DNA replication. Cell. 1993 Jun 18;73(6):1207–1221. doi: 10.1016/0092-8674(93)90649-b. [DOI] [PubMed] [Google Scholar]
  19. Li R., Knight J. D., Jackson S. P., Tjian R., Botchan M. R. Direct interaction between Sp1 and the BPV enhancer E2 protein mediates synergistic activation of transcription. Cell. 1991 May 3;65(3):493–505. doi: 10.1016/0092-8674(91)90467-d. [DOI] [PubMed] [Google Scholar]
  20. Li R., Knight J., Bream G., Stenlund A., Botchan M. Specific recognition nucleotides and their DNA context determine the affinity of E2 protein for 17 binding sites in the BPV-1 genome. Genes Dev. 1989 Apr;3(4):510–526. doi: 10.1101/gad.3.4.510. [DOI] [PubMed] [Google Scholar]
  21. Lusky M., Fontane E. Formation of the complex of bovine papillomavirus E1 and E2 proteins is modulated by E2 phosphorylation and depends upon sequences within the carboxyl terminus of E1. Proc Natl Acad Sci U S A. 1991 Jul 15;88(14):6363–6367. doi: 10.1073/pnas.88.14.6363. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Mohr I. J., Clark R., Sun S., Androphy E. J., MacPherson P., Botchan M. R. Targeting the E1 replication protein to the papillomavirus origin of replication by complex formation with the E2 transactivator. Science. 1990 Dec 21;250(4988):1694–1699. doi: 10.1126/science.2176744. [DOI] [PubMed] [Google Scholar]
  23. Monini P., Grossman S. R., Pepinsky B., Androphy E. J., Laimins L. A. Cooperative binding of the E2 protein of bovine papillomavirus to adjacent E2-responsive sequences. J Virol. 1991 Apr;65(4):2124–2130. doi: 10.1128/jvi.65.4.2124-2130.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Romanczuk H., Thierry F., Howley P. M. Mutational analysis of cis elements involved in E2 modulation of human papillomavirus type 16 P97 and type 18 P105 promoters. J Virol. 1990 Jun;64(6):2849–2859. doi: 10.1128/jvi.64.6.2849-2859.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Sandler A. B., Vande Pol S. B., Spalholz B. A. Repression of bovine papillomavirus type 1 transcription by the E1 replication protein. J Virol. 1993 Sep;67(9):5079–5087. doi: 10.1128/jvi.67.9.5079-5087.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Schiller J. T., Kleiner E., Androphy E. J., Lowy D. R., Pfister H. Identification of bovine papillomavirus E1 mutants with increased transforming and transcriptional activity. J Virol. 1989 Apr;63(4):1775–1782. doi: 10.1128/jvi.63.4.1775-1782.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Schreiber E., Matthias P., Müller M. M., Schaffner W. Rapid detection of octamer binding proteins with 'mini-extracts', prepared from a small number of cells. Nucleic Acids Res. 1989 Aug 11;17(15):6419–6419. doi: 10.1093/nar/17.15.6419. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Seo Y. S., Müller F., Lusky M., Gibbs E., Kim H. Y., Phillips B., Hurwitz J. Bovine papilloma virus (BPV)-encoded E2 protein enhances binding of E1 protein to the BPV replication origin. Proc Natl Acad Sci U S A. 1993 Apr 1;90(7):2865–2869. doi: 10.1073/pnas.90.7.2865. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Spalholz B. A., Lambert P. F., Yee C. L., Howley P. M. Bovine papillomavirus transcriptional regulation: localization of the E2-responsive elements of the long control region. J Virol. 1987 Jul;61(7):2128–2137. doi: 10.1128/jvi.61.7.2128-2137.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Spalholz B. A., Yang Y. C., Howley P. M. Transactivation of a bovine papilloma virus transcriptional regulatory element by the E2 gene product. Cell. 1985 Aug;42(1):183–191. doi: 10.1016/s0092-8674(85)80114-8. [DOI] [PubMed] [Google Scholar]
  31. Tasset D., Tora L., Fromental C., Scheer E., Chambon P. Distinct classes of transcriptional activating domains function by different mechanisms. Cell. 1990 Sep 21;62(6):1177–1187. doi: 10.1016/0092-8674(90)90394-t. [DOI] [PubMed] [Google Scholar]
  32. Thierry F., Dostatni N., Arnos F., Yaniv M. Cooperative activation of transcription by bovine papillomavirus type 1 E2 can occur over a large distance. Mol Cell Biol. 1990 Aug;10(8):4431–4437. doi: 10.1128/mcb.10.8.4431. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Thierry F., Howley P. M. Functional analysis of E2-mediated repression of the HPV18 P105 promoter. New Biol. 1991 Jan;3(1):90–100. [PubMed] [Google Scholar]
  34. Thierry F., Yaniv M. The BPV1-E2 trans-acting protein can be either an activator or a repressor of the HPV18 regulatory region. EMBO J. 1987 Nov;6(11):3391–3397. doi: 10.1002/j.1460-2075.1987.tb02662.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Ustav E., Ustav M., Szymanski P., Stenlund A. The bovine papillomavirus origin of replication requires a binding site for the E2 transcriptional activator. Proc Natl Acad Sci U S A. 1993 Feb 1;90(3):898–902. doi: 10.1073/pnas.90.3.898. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Ustav M., Stenlund A. Transient replication of BPV-1 requires two viral polypeptides encoded by the E1 and E2 open reading frames. EMBO J. 1991 Feb;10(2):449–457. doi: 10.1002/j.1460-2075.1991.tb07967.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Ustav M., Ustav E., Szymanski P., Stenlund A. Identification of the origin of replication of bovine papillomavirus and characterization of the viral origin recognition factor E1. EMBO J. 1991 Dec;10(13):4321–4329. doi: 10.1002/j.1460-2075.1991.tb05010.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  38. Wilson V. G., Ludes-Meyers J. A bovine papillomavirus E1-related protein binds specifically to bovine papillomavirus DNA. J Virol. 1991 Oct;65(10):5314–5322. doi: 10.1128/jvi.65.10.5314-5322.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Xiao H., Perisic O., Lis J. T. Cooperative binding of Drosophila heat shock factor to arrays of a conserved 5 bp unit. Cell. 1991 Feb 8;64(3):585–593. doi: 10.1016/0092-8674(91)90242-q. [DOI] [PubMed] [Google Scholar]
  40. Yang L., Li R., Mohr I. J., Clark R., Botchan M. R. Activation of BPV-1 replication in vitro by the transcription factor E2. Nature. 1991 Oct 17;353(6345):628–632. doi: 10.1038/353628a0. [DOI] [PubMed] [Google Scholar]

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