Induction of Ty recombination in yeast by cDNA and transcription: role of the RAD1 and RAD52 genes.
In the yeast Saccharomyces cerevisiae ectopic recombination has been shown to occur at high frequencies for artificially created repeats, but at relatively low frequencies for a natural family of repeated sequences, the Ty family. Little is known about the mechanism(s) that prevent recombination between repeated sequences. We have previously shown that nonreciprocal recombination (gene conversion) of a genetically marked Ty can be induced either by the presence of high levels of Ty cDNA or by transcription of the marked Ty from a GAL1 promoter. These two kinds of induction act in a synergistic manner. To further characterize these two kinds of Ty recombination, we have investigated the role played by the RAD52 and RAD1 genes. We have found that the RAD52 and RAD1 gene products are essential to carry out transcription-induced Ty conversion whereas cDNA-mediated conversion can take place in their absence.
Nevo-Caspi
Y
Y
Department of Molecular Microbiology and Biotechnology, Tel-Aviv University, Ramat-Aviv, Israel.
Kupiec
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M
D045643:DNA Repair Enzymes; D004251:DNA Transposable Elements; D018076:DNA, Complementary; D004268:DNA-Binding Proteins / Q000235:genetics*; D004720:Endonucleases / Q000235:genetics*; D005656:Fungal Proteins / Q000235:genetics*; D015966:Gene Expression Regulation, Fungal; D051721:Rad52 DNA Repair and Recombination Protein; D011995:Recombination, Genetic; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D014158:Transcription, Genetic
D004251:DNA Transposable Elements; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C497197:RAD52 protein, S cerevisiae; D051721:Rad52 DNA Repair and Recombination Protein; D029701:Saccharomyces cerevisiae Proteins; D004720:Endonucleases; C069266:RAD1 protein, S cerevisiae; D045643:DNA Repair Enzymes