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. 1984 Jan;4(1):195–198. doi: 10.1128/mcb.4.1.195

Recombinational instability of a chimeric plasmid in Saccharomyces cerevisiae.

M S Whiteway, A Ahmed
PMCID: PMC368675  PMID: 6366510

Abstract

Wild-type strains of Saccharomyces cerevisiae exhibit mitotic recombination between the chimeric plasmid TLC-1 and the endogenous 2mu circle that involves sequence homologies between the two plasmids that are not acted on by the 2mu circle site-specific recombination system. This generalized recombination can be detected because it separates the LEU2 and CAN1 markers of TLC-1 from each other through the formation of a plasmid containing only the S. cerevisiae LEU2 region and the 2mu circle. This derivative plasmid is maintained more stably during vegetative growth than TLC-1, and strains which carry it frequently lose the endogenous 2mu circle. Therefore, TLC-1 can provide a convenient selection for [cir0] cells. Formation of this new plasmid is greatly reduced, but not eliminated, in strains containing the rad52-1 mutation. This indicates that generalized mitotic recombination between plasmid sequences utilizes functions required for chromosomal recombination in S. cerevisiae.

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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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