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. 1993 Aug;67(8):5025–5029. doi: 10.1128/jvi.67.8.5025-5029.1993

Amplification mediated by polyomavirus large T antigen defective in replication.

L St-Onge 1, M Bastin 1
PMCID: PMC237891  PMID: 8392627

Abstract

The polyomavirus large T antigen promotes homologous recombination at high rates when expressed in rat cells carrying the viral replication origin and two repeats of viral DNA sequences stably integrated into the cellular genome. Recombination consists of both reciprocal and nonreciprocal events and is promoted by mutants defective in the initiation of viral DNA synthesis (L. St-Onge, L. Bouchard, and M. Bastin, J. Virol. 67:1788-1795, 1993). We have extended our studies to a rat cell line undergoing amplification of the viral insert. We show that large T antigen promotes amplification independently of its replicative function but that its origin-specific DNA binding activity is not sufficient to promote homologous recombination.

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Selected References

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