Abstract:
:Spontaneous mutators of Salmonella typhimurium LT2 were generated by inserting the transposable element Tn5 or Tn10 into the bacterial chromosome. Two mutators mapped at the position of the mutH and mutL loci of S. typhimurium, and two other mutators mapped at positions corresponding to the mutS and uvrD loci of Escherichia coli. A fifth mutator, mutB, did not map at a position corresponding to any of the known mutators of S. typhimurium or E. coli. The mutH,L,S and uvrD alleles increased the frequency of both spontaneous base substitution and frameshift mutations, whereas the mutB allele increased the frequency only of spontaneous base substitution mutations. The increased frequency of base substitution mutations was recA+ independent in the mutH, mutL, and uvrD strains and partially recA+ independent in the mutS strain. The uvrD mutation decreased the resistance of the cells to killing by ultraviolet irradiation. The mutH,L,S and uvrD strains showed an increased sensitivity to mutagenesis by the alkylating agents methyl methane sulfonate and ethyl methane sulfonate, but not to mutagenesis by 4-nitroquinoline-1-oxide.
journal_name
J Bacterioljournal_title
Journal of bacteriologyauthors
Shanabruch WG,Behlau I,Walker GCdoi
10.1128/JB.147.3.827-835.1981subject
Has Abstractpub_date
1981-09-01 00:00:00pages
827-35issue
3eissn
0021-9193issn
1098-5530journal_volume
147pub_type
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journal_title:Journal of bacteriology
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journal_title:Journal of bacteriology
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doi:10.1128/JB.130.2.946-947.1977
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更新日期:1986-10-01 00:00:00
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更新日期:2004-07-01 00:00:00