Teicoplanin, a new antibiotic from Actinoplanes teichomyceticus nov. sp.
AUTOR(ES)
Somma, S
RESUMO
Teicoplanin, a new glycopeptide antibiotic belonging to the same family as vancomycin, inhibits cell wall synthesis in Bacillus subtilis; the inhibition is accompanied by an intracellular accumulation of UDP-N-acetyl-muramyl-pentapeptide. A cell-free system from Bacillus stearothermophilus, capable of synthesizing peptidoglycan, is 50% inhibited by teicoplanin at 40 micrograms/ml and 100% inhibited at 100 micrograms/ml; suppression of peptidoglycan synthesis is accompanied by parallel accumulation of the lipid intermediate. Teicoplanin binds to cell walls and forms a complex with N,N'-diacetyl-L-lysyl-D-alanyl-D-alanine. The association constant of this complex is 2.56 X 10(6) liters mol-1, calculated by spectrophotometric titration. The mechanism of action of teicoplanin is discussed in comparison with those of other inhibitors of cell wall biosynthesis, namely, vancomycin, ristocetin, and gardimycin.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=180050Documentos Relacionados
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