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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1990 Nov;87(22):8692–8696. doi: 10.1073/pnas.87.22.8692

Reconstitution of simian virus 40 DNA replication with purified proteins.

D H Weinberg 1, K L Collins 1, P Simancek 1, A Russo 1, M S Wold 1, D M Virshup 1, T J Kelly 1
PMCID: PMC55025  PMID: 2174160

Abstract

Replication of plasmid DNA molecules containing the simian virus 40 (SV40) origin of DNA replication has been reconstituted with seven highly purified cellular proteins plus the SV40 large tumor (T) antigen. Initiation of DNA synthesis is absolutely dependent upon T antigen, replication protein A, and the DNA polymerase alpha-primase complex and is stimulated by the catalytic subunit of protein phosphatase 2A. Efficient elongation of nascent chains additionally requires proliferating cell nuclear antigen, replication factor C, DNA topoisomerase I, and DNA polymerase delta. Electron microscopic studies indicate that DNA replication begins at the viral origin and proceeds via intermediates containing two forks that move in opposite directions. These findings indicate that the reconstituted replication reaction has many of the characteristics expected of authentic viral DNA replication.

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Selected References

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

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