[Temperature-induced radioresistance of Escherichia coli cells].
A marked increase in radioresistance of E. coli cells, of the wild-type repair genotype, was observed when they were exposed to gamma-radiation at 40-45 degrees C. The effect of the thermoinduced radioresistance did not depend on the growth medium and the pre-incubation temperature but disappeared completely after treatment of cells by chloramphenicol or CaCl2 or after modification of cell membranes by exogenous cholesterol. This phenomenon was not observed with UV-irradiation. It is suggested that the thermoinduced radioresistance is connected with the activation of the membrane-associated repair complex.
D004260:DNA Repair / Q000528:radiation effects*; D004269:DNA, Bacterial / Q000096:biosynthesis / Q000528:radiation effects*; D004277:DNA, Single-Stranded / Q000528:radiation effects; D004307:Dose-Response Relationship, Radiation; D004926:Escherichia coli / Q000235:genetics / Q000528:radiation effects*; D005720:Gamma Rays; D005838:Genotype; D009154:Mutation; D011836:Radiation Tolerance; D013696:Temperature
D004269:DNA, Bacterial; D004277:DNA, Single-Stranded
Termoindutsirovannaia radiorezistentnost' kletok Escherichia coli.