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. 1974 Dec;6(6):672–675. doi: 10.1128/aac.6.6.672

Penicillin-Resistant Mechanisms in Pseudomonas aeruginosa: Effects of Penicillin G and Carbenicillin on Transpeptidase and d-Alanine Carboxypeptidase Activities

Hidekazu Suginaka 1, Akira Ichikawa 1, Shozo Kotani 1
PMCID: PMC444717  PMID: 4217580

Abstract

A membrane fraction from Pseudomonas aeruginosa KM 338 was shown to catalyze in vitro peptidoglycan synthesis from uridine 5′-diphosphate-N-acetylmuramyl-l-alanyl-d- glutamyl-meso-diaminopimelyl-d-alanyl-d-alanine and uridine 5′-diphosphate-N-acetylglucosamine. Synthesized peptidoglycan was partially cross-linked by transpeptidation, which was accompanied by the release of d-alanine. This reaction was strongly inhibited by 25 and 50 μg of penicillin G and carbenicillin per ml respectively, whereas the intact cells were relatively resistant to penicillins (minimal inhibitory concentration of penicillin G and carbenicillin, 30 and 0.125 mg/ml, respectively). Soluble d-alanine carboxypeptidase present in P. aeruginosa KM 338 was studied as well, which was found almost completely inhibited by penicillin G and carbenicillin (10 μg/ml).

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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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