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. 1993 Jun 15;292(Pt 3):697–700. doi: 10.1042/bj2920697

A class-A beta-lactamase from Pseudomonas stutzeri that is highly active against monobactams and cefotaxime.

N Franceschini 1, M Galleni 1, J M Frère 1, A Oratore 1, G Amicosante 1
PMCID: PMC1134169  PMID: 8318000

Abstract

A beta-lactamase produced by Pseudomonas stutzeri was purified to protein homogeneity, and its physicochemical and catalytic properties were determined. Its profile was unusual since, in addition to penicillins, the enzyme hydrolysed second- and third-generation 'beta-lactamase-stable' cephalosporins and monobactams with similar efficiencies. On the basis of the characteristics of the interaction with beta-iodopenicillanic acid, the enzyme could be classified as a class-A beta-lactamase. However, when compared with most class-A beta-lactamases, it exhibited significantly lower kcat./Km values for the compounds usually considered to be the best substrates of these enzymes.

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Selected References

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