title: Repair of ultraviolet light-damaged deoxyribonucleic acid in sbc-A strains of Escherichia coli K-12.
abstract: An Escherichia coli strain carrying both rec+ and sbcA has been constructed. Repair of ultraviolet light-induced deoxyribonucleic acid damage was examined by measuring survival and thymine-dimer excision in the rec+ sbcA strain as well as rec+ sbcA+ and recB recC sbcA strains. The sbcA mutation restores normal survival in both recB recC uvrB and recB recC uvr+ strains. Excision of thymine-containing dimers does not occur in uvrB mutants, regardless of the rec or sbcA genotype. Survival, after ultraviolet-light damage, of a rec+ sbcA strain is quantitatively similar to rec+ sbcA+ and recB recC sbcA strains.
mesh_terms: D004260:DNA Repair; D004269:DNA, Bacterial / Q000378:metabolism* / Q000528:radiation effects; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D005092:Exonucleases / Q000378:metabolism; D005796:Genes; D011740:Pyrimidine Dimers / Q000378:metabolism; D011995:Recombination, Genetic; D014466:Ultraviolet Rays
chemical_list: D004269:DNA, Bacterial; D011740:Pyrimidine Dimers; D005092:Exonucleases