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Fission yeast Swi5 protein, a novel DNA recombination mediator

The Schizosaccharomyces pombe Swi5 protein forms two distinct protein complexes, Swi5–Sfr1 and Swi5–Swi2, each of which plays an important role in the related but functionally distinct processes of homologous recombination and mating-type switching, respectively. The Swi5–Sfr1 mediator complex has been shown to associate with the two RecA-like recombinases, Rhp51 (spRad51) and Dmc1, and to stimulate in vitro DNA strand exchange reactions mediated by these proteins. Genetic analysis indicates that Swi5–Sfr1 works independently of another mediator complex, Rhp55–Rhp57, during Rhp51-dependent recombinational repair. In addition, mutations affecting the two mediators generate distinct repair spectra of HO endonuclease-induced DNA double strand breaks, suggesting that these recombination mediators differently regulate recombination outcomes in an independent manner. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png DNA Repair Elsevier
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