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. 1985 Jun;82(11):3781–3784. doi: 10.1073/pnas.82.11.3781

Homologous recombination between a defective virus and a chromosomal sequence in mammalian cells.

Y Shaul, O Laub, M D Walker, W J Rutter
PMCID: PMC397871  PMID: 2987945

Abstract

Replacement of the early region of simian virus 40 results in virus that cannot replicate in a normal host, CV-1 cells, but can replicate in COS cells, a derivative of CV-1 cells that constitutively express simian virus 40 tumor antigen (T antigen). However, passage of such an early replacement simian virus 40 mutant in COS cells results in the emergence of virus that can propagate in CV-1 cells. Analysis of this virus revealed that the mutant rescued the integrated T-antigen gene from the COS cell genome. Comparison of the sequence of the recovered virus with that of the viral DNA resident in COS cells (strain 776) and the mutant used in our studies (derived from strain 777) proves that the mutant virus acquired the T-antigen gene from the COS cell chromosome via homologous recombination. Most probably this process was mediated by a direct genetic exchange.

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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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