Title
Mutagenesis and repair of DNA damage caused by nitrogen mustard, N,N'-bis(2-chloroethyl)-N-nitrosourea (BCNU), streptozotocin, and mitomycin C in E. coli
UMMS Affiliation
Department of Biochemistry and Molecular Pharmacology
Publication Date
1986-11-01
Document Type
Article
Subjects
Carmustine; *DNA Damage; *DNA Glycosylases; DNA Repair; DNA, Bacterial; Escherichia coli; Genes, Bacterial; Mechlorethamine; Methyltransferases; Mitomycin; Mitomycins; N-Glycosyl Hydrolases; Rec A Recombinases; SOS Response (Genetics); Site-Specific DNA-Methyltransferase (Adenine-Specific); Streptozocin
Disciplines
Biochemistry, Biophysics, and Structural Biology | Pharmacology, Toxicology and Environmental Health
Abstract
Cytotoxicity and mutagenesis by streptozotocin, BCNU, nitrogen mustard, and mitomycin C were evaluated in E. coli mutants deficient in SOS repair, SOS-mediated mutagenesis, the adaptive response, and mutants that engage in aberrant mismatch repair. The results demonstrate that premutagenic lesions are caused by nitrogen mustard, BCNU and streptozotocin that are not repaired by ada or recognized by umuDC. Further, recA mutants were hypomutable after exposure to nitrogen mustard, BCNU, and streptozotocin compared to wild type. With the exception of the monofunctional nitrosourea, streptozotocin, both recA and uvrA gene products contribute to the repair of DNA damage caused by the alkylating agents tested. In the case of streptozotocin, although recA mutants were more sensitive than wild type, uvrA mutants were not. Moreover, while ada and alkA E. coli mutants showed increased sensitivity to streptozotocin, they were not more sensitive to the other alkylating agents evaluated.
Source
Mutat Res. 1986 Nov;166(3):299-42.
Journal/Book/Conference Title
Mutation research
Related Resources
PubMed ID
2946949
Repository Citation
Fram RJ, Sullivan J, Marinus MG. (1986). Mutagenesis and repair of DNA damage caused by nitrogen mustard, N,N'-bis(2-chloroethyl)-N-nitrosourea (BCNU), streptozotocin, and mitomycin C in E. coli. Biochemistry and Molecular Pharmacology Publications. Retrieved from https://escholarship.umassmed.edu/bmp_pp/28