title: Effect of tsl (thermosensitive suppressor of lex) mutation on postreplication repair in Escherichia coli K-12.
abstract: Cells of Escherichia coli K-12 carrying lexA or recA mutations are more sensitive to UV radiation than corresponding wild-type cells and are defective in postreplication repair. Supressor mutations (tsl) have been described previously which increase the UV resistance of lexA uvr+, lexA uvrA, and recAI uvr+ strains, but not the resistance of recA1 uvrA strains. We have studied the effect of the tsl-1 mutation on postreplication repair and find that the enhanced survival conferred by this mutation is correlated with an increased capacity for postreplication repair.
mesh_terms: D004260:DNA Repair; D004269:DNA, Bacterial / Q000096:biosynthesis / Q000378:metabolism*; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism / Q000528:radiation effects; D009154:Mutation; D013489:Suppression, Genetic; D014466:Ultraviolet Rays
chemical_list: D004269:DNA, Bacterial