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. 1984 Mar;3(3):585–591. doi: 10.1002/j.1460-2075.1984.tb01852.x

The complex of polyoma virus middle-T antigen and pp60c-src.

S A Courtneidge, A E Smith
PMCID: PMC557392  PMID: 6325177

Abstract

We have recently proposed that the transforming protein of polyoma virus, middle-T antigen, forms a complex with pp60c-src. Here we provide additional evidence for the existence of the complex using both monoclonal antibodies specific for middle-T and antibodies raised against synthetic peptides corresponding to sequences from both middle-T and pp60c-src. The complex was retained during partial purification of middle-T and was stable to incubation under various conditions. A survey of a number of mutants of middle-T antigen showed that there was a complete correlation between the ability of middle-T to accept phosphate in the in vitro kinase reaction and the presence of a middle-T: pp60c-src complex. This result is in accord with our hypothesis that middle-T itself is not a protein kinase but rather that pp60c-src phosphorylates middle-T. All mutant forms of middle-T antigen capable of transformation had associated pp60c-src. The middle-T of two non-transforming mutants (hr-t mutants) did not have associated pp60c-src, whereas other non-transforming middle-T species did associate with pp60c-src. We propose that the complex plays an essential role in transformation by polyoma virus, but that the existence of the complex per se may not be sufficient.

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Selected References

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

  1. Bendig M. M., Thomas T., Folk W. R. Viable deletion mutant in the medium and large T-antigen-coding sequences of the polyoma virus genome. J Virol. 1980 Mar;33(3):1215–1220. doi: 10.1128/jvi.33.3.1215-1220.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Carmichael G. G., Benjamin T. L. Identification of DNA sequence changes leading to loss of transforming ability in polyoma virus. J Biol Chem. 1980 Jan 10;255(1):230–235. [PubMed] [Google Scholar]
  3. Carmichael G. G., Schaffhausen B. S., Dorsky D. I., Oliver D. B., Benjamin T. L. Carboxy terminus of polyoma middle-sized tumor antigen is required for attachment to membranes, associated protein kinase activities, and cell transformation. Proc Natl Acad Sci U S A. 1982 Jun;79(11):3579–3583. doi: 10.1073/pnas.79.11.3579. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Collett M. S., Erikson E., Purchio A. F., Brugge J. S., Erikson R. L. A normal cell protein similar in structure and function to the avian sarcoma virus transforming gene product. Proc Natl Acad Sci U S A. 1979 Jul;76(7):3159–3163. doi: 10.1073/pnas.76.7.3159. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Collett M. S., Erikson R. L. Protein kinase activity associated with the avian sarcoma virus src gene product. Proc Natl Acad Sci U S A. 1978 Apr;75(4):2021–2024. doi: 10.1073/pnas.75.4.2021. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Courtneidge S. A., Levinson A. D., Bishop J. M. The protein encoded by the transforming gene of avian sarcoma virus (pp60src) and a homologous protein in normal cells (pp60proto-src) are associated with the plasma membrane. Proc Natl Acad Sci U S A. 1980 Jul;77(7):3783–3787. doi: 10.1073/pnas.77.7.3783. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Courtneidge S. A., Smith A. E. Polyoma virus transforming protein associates with the product of the c-src cellular gene. Nature. 1983 Jun 2;303(5916):435–439. doi: 10.1038/303435a0. [DOI] [PubMed] [Google Scholar]
  8. Dilworth S. M., Griffin B. E. Monoclonal antibodies against polyoma virus tumor antigens. Proc Natl Acad Sci U S A. 1982 Feb;79(4):1059–1063. doi: 10.1073/pnas.79.4.1059. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Dilworth S. M. Protein kinase activities associated with distinct antigenic forms of polyoma virus middle T-antigen. EMBO J. 1982;1(11):1319–1328. doi: 10.1002/j.1460-2075.1982.tb01317.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Eckhart W., Hutchinson M. A., Hunter T. An activity phosphorylating tyrosine in polyoma T antigen immunoprecipitates. Cell. 1979 Dec;18(4):925–933. doi: 10.1016/0092-8674(79)90205-8. [DOI] [PubMed] [Google Scholar]
  11. Erikson E., Collett M. S., Erikson R. L. In vitro synthesis of a functional avian sarcoma virus transforming-gene product. Nature. 1978 Aug 31;274(5674):919–921. doi: 10.1038/274919a0. [DOI] [PubMed] [Google Scholar]
  12. Friedmann T., Esty A., LaPorte P., Deininger P. The nucleotide sequence and genome organization of the polyoma early region: extensive nucleotide and amino acid homology with SV40. Cell. 1979 Jul;17(3):715–724. doi: 10.1016/0092-8674(79)90278-2. [DOI] [PubMed] [Google Scholar]
  13. Gilmer T. M., Erikson R. L. Rous sarcoma virus transforming protein, p60src, expressed in E. coli, functions as a protein kinase. Nature. 1981 Dec 24;294(5843):771–773. doi: 10.1038/294771a0. [DOI] [PubMed] [Google Scholar]
  14. Griffin B. E., Maddock C. New classes of viable deletion mutants in the early region of polyoma virus. J Virol. 1979 Sep;31(3):645–656. doi: 10.1128/jvi.31.3.645-656.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Harvey R., Faulkes R., Gillett P., Lindsay N., Paucha E., Bradbury A., Smith A. E. An antibody to a synthetic peptide that recognises SV40 small-t antigen. EMBO J. 1982;1(4):473–477. doi: 10.1002/j.1460-2075.1982.tb01193.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Hunter T., Hutchinson M. A., Eckhart W. Polyoma middle-sized T antigen can be phosphorylated on tyrosine at multiple sites in vitro. EMBO J. 1984 Jan;3(1):73–79. doi: 10.1002/j.1460-2075.1984.tb01763.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Hunter T., Sefton B. M. Transforming gene product of Rous sarcoma virus phosphorylates tyrosine. Proc Natl Acad Sci U S A. 1980 Mar;77(3):1311–1315. doi: 10.1073/pnas.77.3.1311. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Ito Y., Brocklehurst J. R., Dulbecco R. Virus-specific proteins in the plasma membrane of cells lytically infected or transformed by pol-oma virus. Proc Natl Acad Sci U S A. 1977 Oct;74(10):4666–4670. doi: 10.1073/pnas.74.10.4666. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Krueger J. G., Wang E., Goldberg A. R. Evidence that the src gene product of Rous sarcoma virus is membrane associated. Virology. 1980 Feb;101(1):25–40. doi: 10.1016/0042-6822(80)90480-8. [DOI] [PubMed] [Google Scholar]
  20. Levinson A. D., Courtneidge S. A., Bishop J. M. Structural and functional domains of the Rous sarcoma virus transforming protein (pp60src). Proc Natl Acad Sci U S A. 1981 Mar;78(3):1624–1628. doi: 10.1073/pnas.78.3.1624. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Levinson A. D., Oppermann H., Levintow L., Varmus H. E., Bishop J. M. Evidence that the transforming gene of avian sarcoma virus encodes a protein kinase associated with a phosphoprotein. Cell. 1978 Oct;15(2):561–572. doi: 10.1016/0092-8674(78)90024-7. [DOI] [PubMed] [Google Scholar]
  22. Magnusson G., Nilsson M. G., Dilworth S. M., Smolar N. Characterization of polyoma mutants with altered middle and large T-antigens. J Virol. 1981 Sep;39(3):673–683. doi: 10.1128/jvi.39.3.673-683.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. McCormick F., Harlow E. Association of a murine 53,000-dalton phosphoprotein with simian virus 40 large-T antigen in transformed cells. J Virol. 1980 Apr;34(1):213–224. doi: 10.1128/jvi.34.1.213-224.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. McGrath J. P., Levinson A. D. Bacterial expression of an enzymatically active protein encoded by RSV src gene. Nature. 1982 Feb 4;295(5848):423–425. doi: 10.1038/295423a0. [DOI] [PubMed] [Google Scholar]
  25. Nilsson S. V., Tyndall C., Magnusson G. Deletion mapping of a short polyoma virus middle T antigen segment important for transformation. J Virol. 1983 Apr;46(1):284–287. doi: 10.1128/jvi.46.1.284-287.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Oostra B. A., Harvey R., Ely B. K., Markham A. F., Smith A. E. Transforming activity of polyoma virus middle-T antigen probed by site-directed mutagenesis. Nature. 1983 Aug 4;304(5925):456–459. doi: 10.1038/304456a0. [DOI] [PubMed] [Google Scholar]
  27. Oppermann H., Levinson A. D., Varmus H. E., Levintow L., Bishop J. M. Uninfected vertebrate cells contain a protein that is closely related to the product of the avian sarcoma virus transforming gene (src). Proc Natl Acad Sci U S A. 1979 Apr;76(4):1804–1808. doi: 10.1073/pnas.76.4.1804. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Rassoulzadegan M., Cowie A., Carr A., Glaichenhaus N., Kamen R., Cuzin F. The roles of individual polyoma virus early proteins in oncogenic transformation. Nature. 1982 Dec 23;300(5894):713–718. doi: 10.1038/300713a0. [DOI] [PubMed] [Google Scholar]
  29. Rohrschneider L. R., Eisenman R. N., Leitch C. R. Identification of a Rous sarcoma virus transformation-related protein in normal avian and mammalian cells. Proc Natl Acad Sci U S A. 1979 Sep;76(9):4479–4483. doi: 10.1073/pnas.76.9.4479. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Schaffhausen B. S., Benjamin T. L. Phosphorylation of polyoma T antigens. Cell. 1979 Dec;18(4):935–946. doi: 10.1016/0092-8674(79)90206-x. [DOI] [PubMed] [Google Scholar]
  31. Schaffhausen B., Benjamin T. L. Comparison of phosphorylation of two polyoma virus middle T antigens in vivo and in vitro. J Virol. 1981 Oct;40(1):184–196. doi: 10.1128/jvi.40.1.184-196.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Schneider C., Newman R. A., Sutherland D. R., Asser U., Greaves M. F. A one-step purification of membrane proteins using a high efficiency immunomatrix. J Biol Chem. 1982 Sep 25;257(18):10766–10769. [PubMed] [Google Scholar]
  33. Sefton B. M., Hunter T., Beemon K., Eckhart W. Evidence that the phosphorylation of tyrosine is essential for cellular transformation by Rous sarcoma virus. Cell. 1980 Jul;20(3):807–816. doi: 10.1016/0092-8674(80)90327-x. [DOI] [PubMed] [Google Scholar]
  34. Sefton B. M., Hunter T., Beemon K. Product of in vitro translation of the Rous sarcoma virus src gene has protein kinase activity. J Virol. 1979 Apr;30(1):311–318. doi: 10.1128/jvi.30.1.311-318.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Sefton B. M., Walter G. Antiserum specific for the carboxy terminus of the transforming protein of Rous sarcoma virus. J Virol. 1982 Nov;44(2):467–474. doi: 10.1128/jvi.44.2.467-474.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Segawa K., Ito Y. Differential subcellular localization of in vivo-phosphorylated and nonphosphorylated middle-sized tumor antigen of polyoma virus and its relationship to middle-sized tumor antigen phosphorylating activity in vitro. Proc Natl Acad Sci U S A. 1982 Nov;79(22):6812–6816. doi: 10.1073/pnas.79.22.6812. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Smith A. E., Smith R., Griffin B., Fried M. Protein kinase activity associated with polyoma virus middle T antigen in vitro. Cell. 1979 Dec;18(4):915–924. doi: 10.1016/0092-8674(79)90204-6. [DOI] [PubMed] [Google Scholar]
  38. Soeda E., Arrand J. R., Griffin B. E. Polyoma virus. The early region and its T-antigens. Nucleic Acids Res. 1979 Oct 25;7(4):839–857. doi: 10.1093/nar/7.4.839. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Takeya T., Hanafusa H. Structure and sequence of the cellular gene homologous to the RSV src gene and the mechanism for generating the transforming virus. Cell. 1983 Mar;32(3):881–890. doi: 10.1016/0092-8674(83)90073-9. [DOI] [PubMed] [Google Scholar]
  40. Treisman R., Novak U., Favaloro J., Kamen R. Transformation of rat cells by an altered polyoma virus genome expressing only the middle-T protein. Nature. 1981 Aug 13;292(5824):595–600. doi: 10.1038/292595a0. [DOI] [PubMed] [Google Scholar]
  41. Walter G., Hutchinson M. A., Hunter T., Eckhart W. Antibodies specific for the polyoma virus middle-size tumor antigen. Proc Natl Acad Sci U S A. 1981 Aug;78(8):4882–4886. doi: 10.1073/pnas.78.8.4882. [DOI] [PMC free article] [PubMed] [Google Scholar]
  42. Walter G., Hutchinson M. A., Hunter T., Eckhart W. Purification of polyoma virus medium-size tumor antigen by immunoaffinity chromatography. Proc Natl Acad Sci U S A. 1982 Jul;79(13):4025–4029. doi: 10.1073/pnas.79.13.4025. [DOI] [PMC free article] [PubMed] [Google Scholar]
  43. Willingham M. C., Jay G., Pastan I. Localization of the ASV src gene product to the plasma membrane of transformed cells by electron microscopic immunocytochemistry. Cell. 1979 Sep;18(1):125–134. doi: 10.1016/0092-8674(79)90361-1. [DOI] [PubMed] [Google Scholar]
  44. Wong T. W., Goldberg A. R. Synthetic peptide fragment of src gene product inhibits the src protein kinase and crossreacts immunologically with avian onc kinases and cellular phosphoproteins. Proc Natl Acad Sci U S A. 1981 Dec;78(12):7412–7416. doi: 10.1073/pnas.78.12.7412. [DOI] [PMC free article] [PubMed] [Google Scholar]

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