Transformation of Saccharomyces cerevisiae with nonhomologous DNA: illegitimate integration of transforming DNA into yeast chromosomes and in vivo ligation of transforming DNA to mitochondrial DNA sequences.
When the yeast Saccharomyces cerevisiae was transformed with DNA that shares no homology to the genome, three classes of transformants were obtained. In the most common class, the DNA was inserted as the result of a reaction that appears to require base pairing between the target sequence and the terminal few base pairs of the transforming DNA fragment. In the second class, no such homology was detected, and the transforming DNA was integrated next to a CTT or GTT in the target; it is likely that these integration events were mediated by topoisomerase I. The final class involved the in vivo ligation of transforming DNA with nucleus-localized linear fragments of mitochondrial DNA.
Department of Biology, University of North Carolina, Chapel Hill 27599-3280.
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D001483:Base Sequence; D015825:Chromosomes, Fungal; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004264:DNA Topoisomerases, Type I / Q000378:metabolism; D004271:DNA, Fungal / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics; D017353:Gene Deletion; D005800:Genes, Fungal; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D010957:Plasmids; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D014170:Transformation, Genetic
D004271:DNA, Fungal; D004272:DNA, Mitochondrial; D004275:DNA, Ribosomal; D004262:DNA Restriction Enzymes; D004264:DNA Topoisomerases, Type I