title: DNA repair systems in the phototrophic bacterium Rhodobacter capsulatus.
abstract: UV irradiation and mitomycin C exposure trigger a protease-activity-dependent inhibition of cell division in Rhodobacter capsulatus, which begins about 2 h after the treatment is applied. UV irradiation also induces a dose-dependent mutagenesis with a maximal rate between 5 and 10 J m-2, with increased synthesis of a protein of Mr approximately 30,000 between 2 and 3 h after UV irradiation. In addition, R. capsulatus has an efficient photoreactivation system that reverses the lethal effects of UV irradiation in the presence of intense visible light.
mesh_terms: D002455:Cell Division / Q000187:drug effects / Q000528:radiation effects; D002470:Cell Survival / Q000528:radiation effects; D004260:DNA Repair / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D016685:Mitomycin; D008937:Mitomycins / Q000494:pharmacology; D009154:Mutation; D012241:Rhodopseudomonas / Q000528:radiation effects*; D014466:Ultraviolet Rays
chemical_list: D008937:Mitomycins; D016685:Mitomycin