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. 1986 Oct;6(10):3357–3367. doi: 10.1128/mcb.6.10.3357

Identification of the crossover site during FLP-mediated recombination in the Saccharomyces cerevisiae plasmid 2 microns circle.

M McLeod, S Craft, J R Broach
PMCID: PMC367081  PMID: 3540590

Abstract

The FLP protein of the Saccharomyces cerevisiae plasmid 2 microns circle catalyzes site-specific recombination between two repeated segments present on the plasmid. In this paper we present results of experiments we performed to define more precisely the features of the FLP recognition target site, which we propose to designate FRT, and to determine the actual recombination crossover point in vivo. We found that essential sequences for the recombination event are limited to an 8-base-pair core sequence and two 13-base-pair repeated units immediately flanking it. This is the region identified as the FLP binding site in vitro and at which FLP protein promotes specific single-strand cleavages (B. J. Andrews, G. A. Proteau, L. G. Beatty, and P. D. Sadowski, Cell 40:795-803, 1985; J. F. Senecoff, R. C. Bruckner, and M. M. Cox, Proc. Natl. Acad. Sci. USA 82:7270-7274, 1985). Mutations within the core domain can be suppressed by the presence of the identical mutation in the chromatid with which it recombines. However, mutations outside the core are not similarly suppressed. We found that strand exchange during FLP recombination occurs most of the time within the core region, proceeding through a heteroduplex intermediate. Finally, we found that most FLP-mediated events are reciprocal exchanges and that FLP-catalyzed gene conversions occur at low frequency. The low level of gene conversion associated with FLP recombination suggests that it proceeds by a breakage-joining reaction and that the two events are concerted.

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Selected References

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  1. Andrews B. J., McLeod M., Broach J., Sadowski P. D. Interaction of the FLP recombinase of the Saccharomyces cerevisiae 2 micron plasmid with mutated target sequences. Mol Cell Biol. 1986 Jul;6(7):2482–2489. doi: 10.1128/mcb.6.7.2482. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Andrews B. J., Proteau G. A., Beatty L. G., Sadowski P. D. The FLP recombinase of the 2 micron circle DNA of yeast: interaction with its target sequences. Cell. 1985 Apr;40(4):795–803. doi: 10.1016/0092-8674(85)90339-3. [DOI] [PubMed] [Google Scholar]
  3. Babineau D., Vetter D., Andrews B. J., Gronostajski R. M., Proteau G. A., Beatty L. G., Sadowski P. D. The FLP protein of the 2-micron plasmid of yeast. Purification of the protein from Escherichia coli cells expressing the cloned FLP gene. J Biol Chem. 1985 Oct 5;260(22):12313–12319. [PubMed] [Google Scholar]
  4. Beggs J. D. Transformation of yeast by a replicating hybrid plasmid. Nature. 1978 Sep 14;275(5676):104–109. doi: 10.1038/275104a0. [DOI] [PubMed] [Google Scholar]
  5. Broach J. R., Guarascio V. R., Jayaram M. Recombination within the yeast plasmid 2mu circle is site-specific. Cell. 1982 May;29(1):227–234. doi: 10.1016/0092-8674(82)90107-6. [DOI] [PubMed] [Google Scholar]
  6. Broach J. R., Hicks J. B. Replication and recombination functions associated with the yeast plasmid, 2 mu circle. Cell. 1980 Sep;21(2):501–508. doi: 10.1016/0092-8674(80)90487-0. [DOI] [PubMed] [Google Scholar]
  7. Cox E. C., Horner D. L. Dominant mutators in Escherichia coli. Genetics. 1982 Jan;100(1):7–18. doi: 10.1093/genetics/100.1.7. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Cox M. M. The FLP protein of the yeast 2-microns plasmid: expression of a eukaryotic genetic recombination system in Escherichia coli. Proc Natl Acad Sci U S A. 1983 Jul;80(14):4223–4227. doi: 10.1073/pnas.80.14.4223. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Futcher A. B. Copy number amplification of the 2 micron circle plasmid of Saccharomyces cerevisiae. J Theor Biol. 1986 Mar 21;119(2):197–204. doi: 10.1016/s0022-5193(86)80074-1. [DOI] [PubMed] [Google Scholar]
  10. Gronostajski R. M., Sadowski P. D. Determination of DNA sequences essential for FLP-mediated recombination by a novel method. J Biol Chem. 1985 Oct 5;260(22):12320–12327. [PubMed] [Google Scholar]
  11. Hartley J. L., Donelson J. E. Nucleotide sequence of the yeast plasmid. Nature. 1980 Aug 28;286(5776):860–865. doi: 10.1038/286860a0. [DOI] [PubMed] [Google Scholar]
  12. Hoess R. H., Abremski K. Mechanism of strand cleavage and exchange in the Cre-lox site-specific recombination system. J Mol Biol. 1985 Feb 5;181(3):351–362. doi: 10.1016/0022-2836(85)90224-4. [DOI] [PubMed] [Google Scholar]
  13. Ito H., Fukuda Y., Murata K., Kimura A. Transformation of intact yeast cells treated with alkali cations. J Bacteriol. 1983 Jan;153(1):163–168. doi: 10.1128/jb.153.1.163-168.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Kikuchi Y., Nash H. A. Nicking-closing activity associated with bacteriophage lambda int gene product. Proc Natl Acad Sci U S A. 1979 Aug;76(8):3760–3764. doi: 10.1073/pnas.76.8.3760. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Maxam A. M., Gilbert W. Sequencing end-labeled DNA with base-specific chemical cleavages. Methods Enzymol. 1980;65(1):499–560. doi: 10.1016/s0076-6879(80)65059-9. [DOI] [PubMed] [Google Scholar]
  16. McLeod M., Volkert F., Broach J. Components of the site-specific recombination system encoded by the yeast plasmid 2-micron circle. Cold Spring Harb Symp Quant Biol. 1984;49:779–787. doi: 10.1101/sqb.1984.049.01.088. [DOI] [PubMed] [Google Scholar]
  17. Mizuuchi K., Weisberg R., Enquist L., Mizuuchi M., Buraczynska M., Foeller C., Hsu P. L., Ross W., Landy A. Structure and function of the phage lambda att site: size, int-binding sites, and location of the crossover point. Cold Spring Harb Symp Quant Biol. 1981;45(Pt 1):429–437. doi: 10.1101/sqb.1981.045.01.057. [DOI] [PubMed] [Google Scholar]
  18. Nash H. A. Integration and excision of bacteriophage lambda: the mechanism of conservation site specific recombination. Annu Rev Genet. 1981;15:143–167. doi: 10.1146/annurev.ge.15.120181.001043. [DOI] [PubMed] [Google Scholar]
  19. Orr-Weaver T. L., Szostak J. W. Fungal recombination. Microbiol Rev. 1985 Mar;49(1):33–58. doi: 10.1128/mr.49.1.33-58.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Orr-Weaver T. L., Szostak J. W., Rothstein R. J. Yeast transformation: a model system for the study of recombination. Proc Natl Acad Sci U S A. 1981 Oct;78(10):6354–6358. doi: 10.1073/pnas.78.10.6354. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Orr-Weaver T. L., Szostak J. W. Yeast recombination: the association between double-strand gap repair and crossing-over. Proc Natl Acad Sci U S A. 1983 Jul;80(14):4417–4421. doi: 10.1073/pnas.80.14.4417. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Sanger F., Nicklen S., Coulson A. R. DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463–5467. doi: 10.1073/pnas.74.12.5463. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Senecoff J. F., Bruckner R. C., Cox M. M. The FLP recombinase of the yeast 2-micron plasmid: characterization of its recombination site. Proc Natl Acad Sci U S A. 1985 Nov;82(21):7270–7274. doi: 10.1073/pnas.82.21.7270. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Senecoff J. F., Cox M. M. Directionality in FLP protein-promoted site-specific recombination is mediated by DNA-DNA pairing. J Biol Chem. 1986 Jun 5;261(16):7380–7386. [PubMed] [Google Scholar]
  25. Shortle D., Botstein D. Directed mutagenesis with sodium bisulfite. Methods Enzymol. 1983;100:457–468. doi: 10.1016/0076-6879(83)00073-7. [DOI] [PubMed] [Google Scholar]
  26. Toh-e A., Araki H., Utatsu I., Oshima Y. Plasmids resembling 2-micrometers DNA in the osmotolerant yeasts Saccharomyces bailii and Saccharomyces bisporus. J Gen Microbiol. 1984 Oct;130(10):2527–2534. doi: 10.1099/00221287-130-10-2527. [DOI] [PubMed] [Google Scholar]
  27. Toh-e A., Tada S., Oshima Y. 2-micrometers DNA-like plasmids in the osmophilic haploid yeast Saccharomyces rouxii. J Bacteriol. 1982 Sep;151(3):1380–1390. doi: 10.1128/jb.151.3.1380-1390.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Vetter D., Andrews B. J., Roberts-Beatty L., Sadowski P. D. Site-specific recombination of yeast 2-micron DNA in vitro. Proc Natl Acad Sci U S A. 1983 Dec;80(23):7284–7288. doi: 10.1073/pnas.80.23.7284. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Volkert F. C., Broach J. R. Site-specific recombination promotes plasmid amplification in yeast. Cell. 1986 Aug 15;46(4):541–550. doi: 10.1016/0092-8674(86)90879-2. [DOI] [PubMed] [Google Scholar]

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