Escherichia coli cells resistant to the DNA gyrase inhibitor, ciprofloxacin, overproduce a 60 kD protein homologous to GroEL |
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Authors: | P. Hallett A. Mehlert A. Maxwell |
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Affiliation: | Department of Biochemistry, University of Leicester, UK. |
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Abstract: | Using a variety of mutagenic methods, we have generated a series of ciprofloxacin-resistant mutants derived from Escherichia coli strains which overproduce the DNA gyrase A protein. Many of these mutants are found to overexpress a 60 kD protein which is shown to be highly homologous in terms of N-terminal amino acid sequence to the E. coli heat-shock protein, GroEL. Other evidence confirms that the 60 kD protein is unrelated to DNA gyrase and is similar, but not identical, to GroEL. |
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