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. 1983 Jan;23(1):91–97. doi: 10.1128/aac.23.1.91

Characterization of beta-lactamase induction in Enterobacter cloacae.

T D Gootz, C C Sanders
PMCID: PMC184623  PMID: 6402977

Abstract

The induction of beta-lactamase was studied in a strain of Enterobacter cloacae. A wide variety of beta-lactam compounds were found to induce beta-lactamase in this organism, and the degree of induction was directly related to the stability of the inducer to degradation by the enzyme. The kinetics of the induction process were consistent with a system normally under repressor control, suggesting a direct interaction of the beta-lactam compound with a repressor protein in the E. cloacae cells. Although these characteristics are common to many inducible systems in gram-negative organisms, the induction of beta-lactamase in this strain was not subject to catabolite repression with glucose and remained unaffected by exogenous cyclic AMP in the culture medium. This suggests that the organization and function of the beta-lactamase regulatory genes in E. cloacae are unlike those of other inducible gene systems, such as those composing the well-characterized lactose operon in Escherichia coli.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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