Skip to main content
NCBI home page
Journal of Virology logoLink to Journal of Virology
. 1992 Apr;66(4):1933–1942. doi: 10.1128/jvi.66.4.1933-1942.1992

Spacing is crucial for coordination of domain functions within the simian virus 40 core origin of replication.

R Parsons 1, P Tegtmeyer 1
PMCID: PMC288981  PMID: 1312612

Abstract

The simian virus 40 core origin of replication is composed of distinct domains that are bracketed by DNA spacers. We created a matched set of insertion mutations in spacer sites to study the spatial relationships among origin domains. Insertions larger than a single base pair severely inhibit replication regardless of the helical phasing between domains. Replication-defective mutations reduce T-antigen binding and T-antigen-induced KMnO4 modifications of DNA to various extents. Mutations in the early half of the origin reduce T-antigen functions in the entire origin, whereas mutations in the late half reduce functions only in that half. Surprisingly, some mutations that severely inhibit DNA replication reduce T-antigen-induced melting and other structural changes within origin DNA to only a limited extent. In contrast, all replication-defective origin mutations prevent T antigen from extending the primary replication bubble beyond the limits of the core origin of replication. We conclude, therefore, that T-antigen-induced events within the core origin must be spatially coordinated for conversion of T-antigen hexamers bound to the core origin into mobile helicase units.

Full text

PDF
1933

Images in this article

1936Image
on p.1936
1936Image
on p.1936
1937Image
on p.1937
1938Image
on p.1938
1939Image
on p.1939
1940Image
on p.1940
1941Image
on p.1941

Selected References

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

  1. Borowiec J. A., Dean F. B., Bullock P. A., Hurwitz J. Binding and unwinding--how T antigen engages the SV40 origin of DNA replication. Cell. 1990 Jan 26;60(2):181–184. doi: 10.1016/0092-8674(90)90730-3. [DOI] [PubMed] [Google Scholar]
  2. Borowiec J. A., Dean F. B., Hurwitz J. Differential induction of structural changes in the simian virus 40 origin of replication by T antigen. J Virol. 1991 Mar;65(3):1228–1235. doi: 10.1128/jvi.65.3.1228-1235.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Borowiec J. A., Hurwitz J. ATP stimulates the binding of simian virus 40 (SV40) large tumor antigen to the SV40 origin of replication. Proc Natl Acad Sci U S A. 1988 Jan;85(1):64–68. doi: 10.1073/pnas.85.1.64. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Borowiec J. A., Hurwitz J. Localized melting and structural changes in the SV40 origin of replication induced by T-antigen. EMBO J. 1988 Oct;7(10):3149–3158. doi: 10.1002/j.1460-2075.1988.tb03182.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Cohen G. L., Wright P. J., DeLucia A. L., Lewton B. A., Anderson M. E., Tegtmeyer P. Critical spatial requirement within the origin of simian virus 40 DNA replication. J Virol. 1984 Jul;51(1):91–96. doi: 10.1128/jvi.51.1.91-96.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. DeLucia A. L., Deb S., Partin K., Tegtmeyer P. Functional interactions of the simian virus 40 core origin of replication with flanking regulatory sequences. J Virol. 1986 Jan;57(1):138–144. doi: 10.1128/jvi.57.1.138-144.1986. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Dean F. B., Bullock P., Murakami Y., Wobbe C. R., Weissbach L., Hurwitz J. Simian virus 40 (SV40) DNA replication: SV40 large T antigen unwinds DNA containing the SV40 origin of replication. Proc Natl Acad Sci U S A. 1987 Jan;84(1):16–20. doi: 10.1073/pnas.84.1.16. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Dean F. B., Dodson M., Echols H., Hurwitz J. ATP-dependent formation of a specialized nucleoprotein structure by simian virus 40 (SV40) large tumor antigen at the SV40 replication origin. Proc Natl Acad Sci U S A. 1987 Dec;84(24):8981–8985. doi: 10.1073/pnas.84.24.8981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Dean F. B., Hurwitz J. Simian virus 40 large T antigen untwists DNA at the origin of DNA replication. J Biol Chem. 1991 Mar 15;266(8):5062–5071. [PubMed] [Google Scholar]
  10. Deb S. P., Tegtmeyer P. ATP enhances the binding of simian virus 40 large T antigen to the origin of replication. J Virol. 1987 Dec;61(12):3649–3654. doi: 10.1128/jvi.61.12.3649-3654.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Deb S., DeLucia A. L., Baur C. P., Koff A., Tegtmeyer P. Domain structure of the simian virus 40 core origin of replication. Mol Cell Biol. 1986 May;6(5):1663–1670. doi: 10.1128/mcb.6.5.1663. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Deb S., DeLucia A. L., Koff A., Tsui S., Tegtmeyer P. The adenine-thymine domain of the simian virus 40 core origin directs DNA bending and coordinately regulates DNA replication. Mol Cell Biol. 1986 Dec;6(12):4578–4584. doi: 10.1128/mcb.6.12.4578. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Deb S., Tsui S., Koff A., DeLucia A. L., Parsons R., Tegtmeyer P. The T-antigen-binding domain of the simian virus 40 core origin of replication. J Virol. 1987 Jul;61(7):2143–2149. doi: 10.1128/jvi.61.7.2143-2149.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Dodson M., Dean F. B., Bullock P., Echols H., Hurwitz J. Unwinding of duplex DNA from the SV40 origin of replication by T antigen. Science. 1987 Nov 13;238(4829):964–967. doi: 10.1126/science.2823389. [DOI] [PubMed] [Google Scholar]
  15. Dornreiter I., Höss A., Arthur A. K., Fanning E. SV40 T antigen binds directly to the large subunit of purified DNA polymerase alpha. EMBO J. 1990 Oct;9(10):3329–3336. doi: 10.1002/j.1460-2075.1990.tb07533.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Gannon J. V., Lane D. P. p53 and DNA polymerase alpha compete for binding to SV40 T antigen. Nature. 1987 Oct 1;329(6138):456–458. doi: 10.1038/329456a0. [DOI] [PubMed] [Google Scholar]
  17. Goetz G. S., Dean F. B., Hurwitz J., Matson S. W. The unwinding of duplex regions in DNA by the simian virus 40 large tumor antigen-associated DNA helicase activity. J Biol Chem. 1988 Jan 5;263(1):383–392. [PubMed] [Google Scholar]
  18. Gralla J. D. Rapid "footprinting" on supercoiled DNA. Proc Natl Acad Sci U S A. 1985 May;82(10):3078–3081. doi: 10.1073/pnas.82.10.3078. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. 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]
  20. Lanford R. E. Expression of simian virus 40 T antigen in insect cells using a baculovirus expression vector. Virology. 1988 Nov;167(1):72–81. doi: 10.1016/0042-6822(88)90055-4. [DOI] [PubMed] [Google Scholar]
  21. Li J. J., Kelly T. J. Simian virus 40 DNA replication in vitro. Proc Natl Acad Sci U S A. 1984 Nov;81(22):6973–6977. doi: 10.1073/pnas.81.22.6973. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Mastrangelo I. A., Hough P. V., Wall J. S., Dodson M., Dean F. B., Hurwitz J. ATP-dependent assembly of double hexamers of SV40 T antigen at the viral origin of DNA replication. Nature. 1989 Apr 20;338(6217):658–662. doi: 10.1038/338658a0. [DOI] [PubMed] [Google Scholar]
  23. Parsons R. E., Stenger J. E., Ray S., Welker R., Anderson M. E., Tegtmeyer P. Cooperative assembly of simian virus 40 T-antigen hexamers on functional halves of the replication origin. J Virol. 1991 Jun;65(6):2798–2806. doi: 10.1128/jvi.65.6.2798-2806.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Parsons R., Anderson M. E., Tegtmeyer P. Three domains in the simian virus 40 core origin orchestrate the binding, melting, and DNA helicase activities of T antigen. J Virol. 1990 Feb;64(2):509–518. doi: 10.1128/jvi.64.2.509-518.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Roberts J. M. Simian virus 40 (SV40) large tumor antigen causes stepwise changes in SV40 origin structure during initiation of DNA replication. Proc Natl Acad Sci U S A. 1989 Jun;86(11):3939–3943. doi: 10.1073/pnas.86.11.3939. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Simanis V., Lane D. P. An immunoaffinity purification procedure for SV40 large T antigen. Virology. 1985 Jul 15;144(1):88–100. doi: 10.1016/0042-6822(85)90308-3. [DOI] [PubMed] [Google Scholar]
  27. Smale S. T., Tjian R. T-antigen-DNA polymerase alpha complex implicated in simian virus 40 DNA replication. Mol Cell Biol. 1986 Nov;6(11):4077–4087. doi: 10.1128/mcb.6.11.4077. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Stahl H., Dröge P., Knippers R. DNA helicase activity of SV40 large tumor antigen. EMBO J. 1986 Aug;5(8):1939–1944. doi: 10.1002/j.1460-2075.1986.tb04447.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Stillman B. W., Gluzman Y. Replication and supercoiling of simian virus 40 DNA in cell extracts from human cells. Mol Cell Biol. 1985 Aug;5(8):2051–2060. doi: 10.1128/mcb.5.8.2051. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Tegtmeyer P. Simian virus 40 deoxyribonucleic acid synthesis: the viral replicon. J Virol. 1972 Oct;10(4):591–598. doi: 10.1128/jvi.10.4.591-598.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Tsurimoto T., Fairman M. P., Stillman B. Simian virus 40 DNA replication in vitro: identification of multiple stages of initiation. Mol Cell Biol. 1989 Sep;9(9):3839–3849. doi: 10.1128/mcb.9.9.3839. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Wobbe C. R., Dean F., Weissbach L., Hurwitz J. In vitro replication of duplex circular DNA containing the simian virus 40 DNA origin site. Proc Natl Acad Sci U S A. 1985 Sep;82(17):5710–5714. doi: 10.1073/pnas.82.17.5710. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Wold M. S., Li J. J., Kelly T. J. Initiation of simian virus 40 DNA replication in vitro: large-tumor-antigen- and origin-dependent unwinding of the template. Proc Natl Acad Sci U S A. 1987 Jun;84(11):3643–3647. doi: 10.1073/pnas.84.11.3643. [DOI] [PMC free article] [PubMed] [Google Scholar]

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

RESOURCES