PMID:363701

Citation	Dabbs, ER (1978) Kasugamycin-dependent mutants of Escherichia coli.J. Bacteriol. 136:994-1001
Abstract	Kasugamycin-dependent mutants have been isolated from Escherichia coli B. They were obtained through mutagenesis with ethyl methane sulfonate or nitrosoguanidine in conjunction with an antibiotic underlay technique. In the case of nitrosoguanidine, dependent mutants were obtained at a frequency of about 3% of survivors growing up in the selection. In the case of ethyl methane sulfonate, the corresponding value was 1%. Nineteen mutants showing a kasugamycin-dependent phenotype were studied. In terms of response to various temperatures and antibiotic concentrations, they were very heterogeneous, although most fell into two general classes. Genetic analysis indicated that in at least some cases, the kasugamycin-dependent phenotype was the product of two mutations. Two-dimensional gel electropherograms revealed alterations in the ribosomal proteins of seven mutants. One mutant had an alteration in protein S13, and one had an alteration in protein L14. Three showed changes in protein S9. Each of two mutants had changes in two proteins, S18 and L11. Three of these mutants additionally had protein S18 occurring in a partly altered, partly unaltered form.
Links	PubMed
Keywords	Aminoglycosides; Anti-Bacterial Agents; Bacterial Proteins; Chromosome Mapping; Chromosomes, Bacterial; Dose-Response Relationship, Drug; Escherichia coli; Genes; Mutation; Ribosomal Proteins; Temperature
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Phenotype of	Taxon Information	Genotype Information (if known)	Condition Information	OMP ID	OMP Term Name	ECO ID	ECO Term Name	Notes	Status
a mutation or genetic difference within a strain	Taxon: Escherichia coli Strain: K-12 Substrain: L44 NCBI Taxon ID: 83333	Genotype of Reference Strain: Ksg r rpsM MV9	Reference Condition:					Kasugamycin resistance developed when the strain was grown 42C.
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