Transient expression of Saccharomyces cerevisiae endo-exonuclease NUD1 gene increases the frequency of extrachromosomal homologous recombination in mouse Ltk- fibroblasts.
Endo-exonucleases (EEs) are nucleolytic enzymes which have been shown to participate in the processes of DNA repair and recombination in eukaryotes. Recently, we have demonstrated that transient expression of Saccharomyces cerevisiae EE NUD1 gene in HeLa cells increased the resistance of the latter to ionizing radiation and cisplatin, suggesting the involvement of the NUD1 gene product in the recombination repair of double-strand breaks (DSB). Here, we report that transient expression of NUD1 results in up to 62% increase in the frequency of homologous recombination between two co-transfected linear plasmids in mouse Ltk- cells.
Semionov
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Departments of Oncology and Medicine, Faculty of Medicine, McGill University and Montreal General Hospital, 1650 Avenue Cedar, Montreal, Quebec, Canada.
Cournoyer
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Chow
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D000818:Animals; D002478:Cells, Cultured; D004271:DNA, Fungal / Q000235:genetics; D003851:Deoxyribonucleases / Q000096:biosynthesis / Q000235:genetics*; D005111:Extrachromosomal Inheritance / Q000235:genetics*; D005347:Fibroblasts / Q000201:enzymology*; D005656:Fungal Proteins / Q000096:biosynthesis / Q000235:genetics; D051379:Mice; D010957:Plasmids / Q000235:genetics; D020794:Receptor Protein-Tyrosine Kinases / Q000096:biosynthesis; D011995:Recombination, Genetic; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D029701:Saccharomyces cerevisiae Proteins; D013997:Time Factors; D014162:Transfection / Q000235:genetics; D012359:tRNA Methyltransferases
D004271:DNA, Fungal; D005656:Fungal Proteins; D029701:Saccharomyces cerevisiae Proteins; D012359:tRNA Methyltransferases; C064626:Ltk protein, mouse; D020794:Receptor Protein-Tyrosine Kinases; D003851:Deoxyribonucleases; C077501:TRM2 protein, S cerevisiae