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. 1993 Apr;67(4):2402–2407. doi: 10.1128/jvi.67.4.2402-2407.1993

The human papillomavirus E7 oncoprotein and the cellular transcription factor E2F bind to separate sites on the retinoblastoma tumor suppressor protein.

E W Wu 1, K E Clemens 1, D V Heck 1, K Münger 1
PMCID: PMC240412  PMID: 8445736

Abstract

The ability of the high-risk and low-risk human papillomavirus E7 oncoproteins to disrupt complexes of the retinoblastoma tumor suppressor protein pRB and the cellular transcription factor E2F was studied. The ability of E7 to disrupt this transcription factor complex correlated with the different pRB binding efficiencies of the high-risk and low-risk human papillomavirus-encoded E7 proteins. The pRB binding site was the sole determinant for these observed differences. The phosphorylation status of the casein kinase II site that is immediately adjacent to the pRB binding site in E7 had no marked effect on this biochemical property of E7. Peptides consisting of the pRB binding site of E7, however, were not able to disrupt the pRB/E2F complex. These data suggest that additional carboxy-terminal sequences in E7 are also required for the efficient disruption of the pRB/E2F complex and that E7 and E2F may interact with nonidentical sites of pRB.

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Selected References

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  1. Bagchi S., Raychaudhuri P., Nevins J. R. Adenovirus E1A proteins can dissociate heteromeric complexes involving the E2F transcription factor: a novel mechanism for E1A trans-activation. Cell. 1990 Aug 24;62(4):659–669. doi: 10.1016/0092-8674(90)90112-r. [DOI] [PubMed] [Google Scholar]
  2. Bagchi S., Weinmann R., Raychaudhuri P. The retinoblastoma protein copurifies with E2F-I, an E1A-regulated inhibitor of the transcription factor E2F. Cell. 1991 Jun 14;65(6):1063–1072. doi: 10.1016/0092-8674(91)90558-g. [DOI] [PubMed] [Google Scholar]
  3. Barbosa M. S., Edmonds C., Fisher C., Schiller J. T., Lowy D. R., Vousden K. H. The region of the HPV E7 oncoprotein homologous to adenovirus E1a and Sv40 large T antigen contains separate domains for Rb binding and casein kinase II phosphorylation. EMBO J. 1990 Jan;9(1):153–160. doi: 10.1002/j.1460-2075.1990.tb08091.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Barbosa M. S., Lowy D. R., Schiller J. T. Papillomavirus polypeptides E6 and E7 are zinc-binding proteins. J Virol. 1989 Mar;63(3):1404–1407. doi: 10.1128/jvi.63.3.1404-1407.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Cao L., Faha B., Dembski M., Tsai L. H., Harlow E., Dyson N. Independent binding of the retinoblastoma protein and p107 to the transcription factor E2F. Nature. 1992 Jan 9;355(6356):176–179. doi: 10.1038/355176a0. [DOI] [PubMed] [Google Scholar]
  6. Chellappan S. P., Hiebert S., Mudryj M., Horowitz J. M., Nevins J. R. The E2F transcription factor is a cellular target for the RB protein. Cell. 1991 Jun 14;65(6):1053–1061. doi: 10.1016/0092-8674(91)90557-f. [DOI] [PubMed] [Google Scholar]
  7. Chellappan S., Kraus V. B., Kroger B., Munger K., Howley P. M., Phelps W. C., Nevins J. R. Adenovirus E1A, simian virus 40 tumor antigen, and human papillomavirus E7 protein share the capacity to disrupt the interaction between transcription factor E2F and the retinoblastoma gene product. Proc Natl Acad Sci U S A. 1992 May 15;89(10):4549–4553. doi: 10.1073/pnas.89.10.4549. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Chittenden T., Livingston D. M., Kaelin W. G., Jr The T/E1A-binding domain of the retinoblastoma product can interact selectively with a sequence-specific DNA-binding protein. Cell. 1991 Jun 14;65(6):1073–1082. doi: 10.1016/0092-8674(91)90559-h. [DOI] [PubMed] [Google Scholar]
  9. Defeo-Jones D., Huang P. S., Jones R. E., Haskell K. M., Vuocolo G. A., Hanobik M. G., Huber H. E., Oliff A. Cloning of cDNAs for cellular proteins that bind to the retinoblastoma gene product. Nature. 1991 Jul 18;352(6332):251–254. doi: 10.1038/352251a0. [DOI] [PubMed] [Google Scholar]
  10. Devoto S. H., Mudryj M., Pines J., Hunter T., Nevins J. R. A cyclin A-protein kinase complex possesses sequence-specific DNA binding activity: p33cdk2 is a component of the E2F-cyclin A complex. Cell. 1992 Jan 10;68(1):167–176. doi: 10.1016/0092-8674(92)90215-x. [DOI] [PubMed] [Google Scholar]
  11. Dyson N., Guida P., Münger K., Harlow E. Homologous sequences in adenovirus E1A and human papillomavirus E7 proteins mediate interaction with the same set of cellular proteins. J Virol. 1992 Dec;66(12):6893–6902. doi: 10.1128/jvi.66.12.6893-6902.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Edmonds C., Vousden K. H. A point mutational analysis of human papillomavirus type 16 E7 protein. J Virol. 1989 Jun;63(6):2650–2656. doi: 10.1128/jvi.63.6.2650-2656.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Figge J., Webster T., Smith T. F., Paucha E. Prediction of similar transforming regions in simian virus 40 large T, adenovirus E1A, and myc oncoproteins. J Virol. 1988 May;62(5):1814–1818. doi: 10.1128/jvi.62.5.1814-1818.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Firzlaff J. M., Galloway D. A., Eisenman R. N., Lüscher B. The E7 protein of human papillomavirus type 16 is phosphorylated by casein kinase II. New Biol. 1989 Oct;1(1):44–53. [PubMed] [Google Scholar]
  15. Gage J. R., Meyers C., Wettstein F. O. The E7 proteins of the nononcogenic human papillomavirus type 6b (HPV-6b) and of the oncogenic HPV-16 differ in retinoblastoma protein binding and other properties. J Virol. 1990 Feb;64(2):723–730. doi: 10.1128/jvi.64.2.723-730.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Hawley-Nelson P., Vousden K. H., Hubbert N. L., Lowy D. R., Schiller J. T. HPV16 E6 and E7 proteins cooperate to immortalize human foreskin keratinocytes. EMBO J. 1989 Dec 1;8(12):3905–3910. doi: 10.1002/j.1460-2075.1989.tb08570.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Heck D. V., Yee C. L., Howley P. M., Münger K. Efficiency of binding the retinoblastoma protein correlates with the transforming capacity of the E7 oncoproteins of the human papillomaviruses. Proc Natl Acad Sci U S A. 1992 May 15;89(10):4442–4446. doi: 10.1073/pnas.89.10.4442. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Helin K., Lees J. A., Vidal M., Dyson N., Harlow E., Fattaey A. A cDNA encoding a pRB-binding protein with properties of the transcription factor E2F. Cell. 1992 Jul 24;70(2):337–350. doi: 10.1016/0092-8674(92)90107-n. [DOI] [PubMed] [Google Scholar]
  19. Hiebert S. W., Blake M., Azizkhan J., Nevins J. R. Role of E2F transcription factor in E1A-mediated trans activation of cellular genes. J Virol. 1991 Jul;65(7):3547–3552. doi: 10.1128/jvi.65.7.3547-3552.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Jewers R. J., Hildebrandt P., Ludlow J. W., Kell B., McCance D. J. Regions of human papillomavirus type 16 E7 oncoprotein required for immortalization of human keratinocytes. J Virol. 1992 Mar;66(3):1329–1335. doi: 10.1128/jvi.66.3.1329-1335.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Kaelin W. G., Jr, Krek W., Sellers W. R., DeCaprio J. A., Ajchenbaum F., Fuchs C. S., Chittenden T., Li Y., Farnham P. J., Blanar M. A. Expression cloning of a cDNA encoding a retinoblastoma-binding protein with E2F-like properties. Cell. 1992 Jul 24;70(2):351–364. doi: 10.1016/0092-8674(92)90108-o. [DOI] [PubMed] [Google Scholar]
  22. Mincheva A., Gissmann L., zur Hausen H. Chromosomal integration sites of human papillomavirus DNA in three cervical cancer cell lines mapped by in situ hybridization. Med Microbiol Immunol. 1987;176(5):245–256. doi: 10.1007/BF00190531. [DOI] [PubMed] [Google Scholar]
  23. Mudryj M., Devoto S. H., Hiebert S. W., Hunter T., Pines J., Nevins J. R. Cell cycle regulation of the E2F transcription factor involves an interaction with cyclin A. Cell. 1991 Jun 28;65(7):1243–1253. doi: 10.1016/0092-8674(91)90019-u. [DOI] [PubMed] [Google Scholar]
  24. Mudryj M., Hiebert S. W., Nevins J. R. A role for the adenovirus inducible E2F transcription factor in a proliferation dependent signal transduction pathway. EMBO J. 1990 Jul;9(7):2179–2184. doi: 10.1002/j.1460-2075.1990.tb07387.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Münger K., Phelps W. C., Bubb V., Howley P. M., Schlegel R. The E6 and E7 genes of the human papillomavirus type 16 together are necessary and sufficient for transformation of primary human keratinocytes. J Virol. 1989 Oct;63(10):4417–4421. doi: 10.1128/jvi.63.10.4417-4421.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Münger K., Werness B. A., Dyson N., Phelps W. C., Harlow E., Howley P. M. Complex formation of human papillomavirus E7 proteins with the retinoblastoma tumor suppressor gene product. EMBO J. 1989 Dec 20;8(13):4099–4105. doi: 10.1002/j.1460-2075.1989.tb08594.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Münger K., Yee C. L., Phelps W. C., Pietenpol J. A., Moses H. L., Howley P. M. Biochemical and biological differences between E7 oncoproteins of the high- and low-risk human papillomavirus types are determined by amino-terminal sequences. J Virol. 1991 Jul;65(7):3943–3948. doi: 10.1128/jvi.65.7.3943-3948.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Pagano M., Draetta G., Jansen-Dürr P. Association of cdk2 kinase with the transcription factor E2F during S phase. Science. 1992 Feb 28;255(5048):1144–1147. doi: 10.1126/science.1312258. [DOI] [PubMed] [Google Scholar]
  29. Phelps W. C., Bagchi S., Barnes J. A., Raychaudhuri P., Kraus V., Münger K., Howley P. M., Nevins J. R. Analysis of trans activation by human papillomavirus type 16 E7 and adenovirus 12S E1A suggests a common mechanism. J Virol. 1991 Dec;65(12):6922–6930. doi: 10.1128/jvi.65.12.6922-6930.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Phelps W. C., Münger K., Yee C. L., Barnes J. A., Howley P. M. Structure-function analysis of the human papillomavirus type 16 E7 oncoprotein. J Virol. 1992 Apr;66(4):2418–2427. doi: 10.1128/jvi.66.4.2418-2427.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Phelps W. C., Yee C. L., Münger K., Howley P. M. The human papillomavirus type 16 E7 gene encodes transactivation and transformation functions similar to those of adenovirus E1A. Cell. 1988 May 20;53(4):539–547. doi: 10.1016/0092-8674(88)90570-3. [DOI] [PubMed] [Google Scholar]
  32. Qin X. Q., Chittenden T., Livingston D. M., Kaelin W. G., Jr Identification of a growth suppression domain within the retinoblastoma gene product. Genes Dev. 1992 Jun;6(6):953–964. doi: 10.1101/gad.6.6.953. [DOI] [PubMed] [Google Scholar]
  33. Rawls J. A., Pusztai R., Green M. Chemical synthesis of human papillomavirus type 16 E7 oncoprotein: autonomous protein domains for induction of cellular DNA synthesis and for trans activation. J Virol. 1990 Dec;64(12):6121–6129. doi: 10.1128/jvi.64.12.6121-6129.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. 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]
  35. Shirodkar S., Ewen M., DeCaprio J. A., Morgan J., Livingston D. M., Chittenden T. The transcription factor E2F interacts with the retinoblastoma product and a p107-cyclin A complex in a cell cycle-regulated manner. Cell. 1992 Jan 10;68(1):157–166. doi: 10.1016/0092-8674(92)90214-w. [DOI] [PubMed] [Google Scholar]
  36. Stirdivant S. M., Huber H. E., Patrick D. R., Defeo-Jones D., McAvoy E. M., Garsky V. M., Oliff A., Heimbrook D. C. Human papillomavirus type 16 E7 protein inhibits DNA binding by the retinoblastoma gene product. Mol Cell Biol. 1992 May;12(5):1905–1914. doi: 10.1128/mcb.12.5.1905. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Storey A., Osborn K., Crawford L. Co-transformation by human papillomavirus types 6 and 11. J Gen Virol. 1990 Jan;71(Pt 1):165–171. doi: 10.1099/0022-1317-71-1-165. [DOI] [PubMed] [Google Scholar]
  38. Storey A., Pim D., Murray A., Osborn K., Banks L., Crawford L. Comparison of the in vitro transforming activities of human papillomavirus types. EMBO J. 1988 Jun;7(6):1815–1820. doi: 10.1002/j.1460-2075.1988.tb03013.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Watanabe S., Kanda T., Sato H., Furuno A., Yoshiike K. Mutational analysis of human papillomavirus type 16 E7 functions. J Virol. 1990 Jan;64(1):207–214. doi: 10.1128/jvi.64.1.207-214.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Watanabe S., Sato H., Komiyama N., Kanda T., Yoshiike K. The E7 functions of human papillomaviruses in rat 3Y1 cells. Virology. 1992 Mar;187(1):107–114. doi: 10.1016/0042-6822(92)90299-5. [DOI] [PubMed] [Google Scholar]

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