Bacteriolytic effect of cessation of glucosamine supply, induced by specific inhibition of glucosamine-6-phosphate synthetase

The antibiotic tetaine (bacilysin) and its C-terminal epoxyaminoacid--anticapsin--are powerful inhibitors of glucosamine-6-phosphate synthetase (EC 5.3.1.19.) in cell-free extracts of Escherichia coli K-12. Tetaine acts on growing cells as a bactericidal agent. This bactericidal action, measured fro...

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Bibliographic Details
Published inActa microbiologica Polonica Vol. 35; no. 1-2; p. 15
Main Authors Chmara, H, Borowski, E
Format Journal Article
LanguageEnglish
Published Poland 1986
Subjects
Anti-Bacterial Agents - pharmacology
Dipeptides - pharmacology
Escherichia coli - drug effects
Escherichia coli - enzymology
Escherichia coli - growth & development
Glucosamine - metabolism
Glutamine-Fructose-6-Phosphate Transaminase (Isomerizing) - antagonists & inhibitors
Kinetics
Penicillin G - pharmacology
Transaminases - antagonists & inhibitors
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Summary:The antibiotic tetaine (bacilysin) and its C-terminal epoxyaminoacid--anticapsin--are powerful inhibitors of glucosamine-6-phosphate synthetase (EC 5.3.1.19.) in cell-free extracts of Escherichia coli K-12. Tetaine acts on growing cells as a bactericidal agent. This bactericidal action, measured from 10 to 160 muM concentration, is a consequence of the induction of lysis of growing cells. The induction of lysis by tetaine is compared with the lytic action of some beta-lactams. Hypertonic medium, destruction of the antibiotic, presence of chloramphenicol or the addition of N-acetylglucosamine protect E. coli K-12 cells against lysis induced by tetaine. These effects are compared with those observed in the presence of penicillin G. The results indicate that inhibition of early or late stages of peptidoglycan synthesis all result in more or less the same consequence, i.e. death via cell lysis.
ISSN:0137-1320