Skip to main content
Journal of Virology logoLink to Journal of Virology
. 1990 Nov;64(11):5649–5651. doi: 10.1128/jvi.64.11.5649-5651.1990

Association of simian virus 40 small-t antigen with the 61-kilodalton component of a cellular protein complex.

B Joshi 1, K Rundell 1
PMCID: PMC248622  PMID: 2170691

Abstract

Two cellular proteins, 61 and 37 kDa, are found in association with the simian virus 40 (SV40) small-t antigen. Fractionation in standard chromatography systems showed that these proteins were associated with one another in uninfected cells, suggesting that the small-t antigen may bind the complex as a whole and not each individual protein independently. In the presence of N-ethylmaleimide, the 37-kDA protein was selectively released from immune complexes, leaving the small-t antigen and 61-kDa protein in association. This result suggests that the small-t antigen may bind only the 61-kDa protein and that the 37-kDa protein may be associated with immune complexes by virtue of its association with the 61-kDa cellular protein.

Full text

PDF
5649

Images in this article

Selected References

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

  1. Cohen P. The structure and regulation of protein phosphatases. Annu Rev Biochem. 1989;58:453–508. doi: 10.1146/annurev.bi.58.070189.002321. [DOI] [PubMed] [Google Scholar]
  2. Crawford L. V., O'Farrell P. Z. Effect of alkylation on the physical properties of simian virus 40 T-antigen species. J Virol. 1979 Feb;29(2):587–596. doi: 10.1128/jvi.29.2.587-596.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Grussenmeyer T., Carbone-Wiley A., Scheidtmann K. H., Walter G. Interactions between polyomavirus medium T antigen and three cellular proteins of 88, 61, and 37 kilodaltons. J Virol. 1987 Dec;61(12):3902–3909. doi: 10.1128/jvi.61.12.3902-3909.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Grussenmeyer T., Scheidtmann K. H., Hutchinson M. A., Eckhart W., Walter G. Complexes of polyoma virus medium T antigen and cellular proteins. Proc Natl Acad Sci U S A. 1985 Dec;82(23):7952–7954. doi: 10.1073/pnas.82.23.7952. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Pallas D. C., Cherington V., Morgan W., DeAnda J., Kaplan D., Schaffhausen B., Roberts T. M. Cellular proteins that associate with the middle and small T antigens of polyomavirus. J Virol. 1988 Nov;62(11):3934–3940. doi: 10.1128/jvi.62.11.3934-3940.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Pallas D. C., Shahrik L. K., Martin B. L., Jaspers S., Miller T. B., Brautigan D. L., Roberts T. M. Polyoma small and middle T antigens and SV40 small t antigen form stable complexes with protein phosphatase 2A. Cell. 1990 Jan 12;60(1):167–176. doi: 10.1016/0092-8674(90)90726-u. [DOI] [PubMed] [Google Scholar]
  7. Phillips B., Rundell K. Failure of simian virus 40 small t antigen to disorganize actin cables in nonpermissive cell lines. J Virol. 1988 Mar;62(3):768–775. doi: 10.1128/jvi.62.3.768-775.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Rundell K. Complete interaction of cellular 56,000- and 32,000-Mr proteins with simian virus 40 small-t antigen in productively infected cells. J Virol. 1987 Apr;61(4):1240–1243. doi: 10.1128/jvi.61.4.1240-1243.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Rundell K., Major E. O., Lampert M. Association of cellular 56,000- and 32,000-molecular-weight protein with BK virus and polyoma virus t-antigens. J Virol. 1981 Mar;37(3):1090–1093. doi: 10.1128/jvi.37.3.1090-1093.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Schaffhausen B. S., Silver J. E., Benjamin T. L. Tumor antigen(s) in cell productively infected by wild-type polyoma virus and mutant NG-18. Proc Natl Acad Sci U S A. 1978 Jan;75(1):79–83. doi: 10.1073/pnas.75.1.79. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Walter G., Carbone-Wiley A., Joshi B., Rundell K. Homologous cellular proteins associated with simian virus 40 small T antigen and polyomavirus medium T antigen. J Virol. 1988 Dec;62(12):4760–4762. doi: 10.1128/jvi.62.12.4760-4762.1988. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Walter G., Ferre F., Espiritu O., Carbone-Wiley A. Molecular cloning and sequence of cDNA encoding polyoma medium tumor antigen-associated 61-kDa protein. Proc Natl Acad Sci U S A. 1989 Nov;86(22):8669–8672. doi: 10.1073/pnas.86.22.8669. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Walter G., Ruediger R., Slaughter C., Mumby M. Association of protein phosphatase 2A with polyoma virus medium tumor antigen. Proc Natl Acad Sci U S A. 1990 Apr;87(7):2521–2525. doi: 10.1073/pnas.87.7.2521. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Yang Y. C., Hearing P., Rundell K. Cellular proteins associated with simian virus 40 early gene products in newly infected cells. J Virol. 1979 Oct;32(1):147–154. doi: 10.1128/jvi.32.1.147-154.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Journal of Virology are provided here courtesy of American Society for Microbiology (ASM)

RESOURCES