title: Resident enhanced repair: novel repair process action on plasmid DNA transformed into Escherichia coli K-12.
abstract: The survival of UV-irradiated DNA of plasmid NTP16 was monitored after its transformation into recipient cells containing an essentially homologous undamaged plasmid, pLV9. The presence of pLV9 resulted in a substantial increase in the fraction of damaged NTP16 molecules which survived in the recipient cells. This enhanced survival requires the host uvrA+ and uvrB+ gene products, but not the host recA+ gene product. The requirement for both homologous DNA and the uvrA+ and uvrB+ gene products suggests that a novel repair process may act on plasmid DNA. Possible mechanisms for this process are considered.
mesh_terms: D004260:DNA Repair; D004269:DNA, Bacterial / Q000378:metabolism*; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D010957:Plasmids; D011995:Recombination, Genetic; D014169:Transformation, Bacterial; D014466:Ultraviolet Rays
chemical_list: D004269:DNA, Bacterial