Degradation of phospholipid in pseudomonas aeruginosa induced by polymyxin B

Tomonobu Kusano, Kazuo Izaki, Hajime Takahashi

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    18 Citations (Scopus)


    Effects of polymyxin B on the synthesis and degradation of lipid, ribonucleic acid (RNA) and protein in Pseudomonas aeruginosa were investigated. It was found that polymyxin B caused a marked degradation of the lipid fraction which was prelabeled with (3H-2)-glycerol. Thin-layer chromatographic analysis indicated that the main degraded lipids were phosphatidylethanolamine and phosphatidylglycerol, which constituted 80%, and 15% of the total phospholipids of this organism, respectively. Polymyxin B also inhibited synthesis of RNA and protein in vivo. The severe inhibition of the uptake of labeled amino acids by polymyxin B indicated that the observed inhibition of RNA and protein synthesis possibly occurred at the level of substrate transports. The degradation of phospholipid might account for the defective membrane activities.

    Original languageEnglish
    Pages (from-to)689-695
    Number of pages7
    Journalthe journal of antibiotics
    Issue number9
    Publication statusPublished - 1975

    ASJC Scopus subject areas

    • Pharmacology
    • Drug Discovery


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