1984
DOI: 10.1111/j.1365-2672.1984.tb04697.x
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Effects of the resistance plasmid R124 on the level of the OmpF outer membrane protein and on the response of Escherichia coli to environmental agents

Abstract: The introduction of the F-like resistance plasmid R124 into an ompC mutant of Escherichia coli K12 conferred altered sensitivity to a wide range of inhibitory agents. Sensitivity to ampicillin, chloramphenicol, ethionine, copper ions, deoxycholate, two fatty acids and colicins L and M was decreased by the plasmid. In contrast the plasmid-bearing ompC derivatives were more sensitive than the plasmid-free ompC mutant to erythromycin, cetyltrimethylammonium bromide and phenol. Introduction of R124 into the ompC s… Show more

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Cited by 45 publications
(14 citation statements)
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“…The plasmid ColV-M40(5) is a mutant form of ColV, I-K94 which forms virtually no VmpA protein in P678-54 ompA. The origin and characteristics of strains P678-54, PCO 479 and 1131 ompA were described by Rossouw & Rowbury (1984). From P678-54, ompA mutants were prepared by plating organisms with excess phage K3 and isolating resistant colonies.…”
Section: Methodsmentioning
confidence: 99%
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“…The plasmid ColV-M40(5) is a mutant form of ColV, I-K94 which forms virtually no VmpA protein in P678-54 ompA. The origin and characteristics of strains P678-54, PCO 479 and 1131 ompA were described by Rossouw & Rowbury (1984). From P678-54, ompA mutants were prepared by plating organisms with excess phage K3 and isolating resistant colonies.…”
Section: Methodsmentioning
confidence: 99%
“…Derivatives of strain 1131 and strain P678-54 ompA carrying F-like plasmids were made either by plasmid transfer in nutrient broth at 37 "C with gentle shaking (Rossouw & Rowbury, 1984) using derivatives of E. coli 1829 (Rowbury et al, 1985) as donors, or by filter conjugation. For this purpose, unless otherwise stated, donor strains were derivatives of strain 1829; 1 ml samples of donor and recipient strains grown to exponential phase (about 2 x lo8 organisms ml-I ) in nutrient broth at 37 "C were filtered onto 0.22 pm pore size Millipore filters (sterilized by UV irradiation) and filters incubated on nutrient agar plates for 2-3 h at 37 "C. After incubation, filters were transferred to 2 ml supplemented glucose MM and, after dilution, cells were plated on appropriate selective media.…”
Section: Methodsmentioning
confidence: 99%
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