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The influence exerted by sideromycins on poly-U-directed incorporation of phenylalanine in the S-30 fraction of Staphylococcus aureus

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Zusammenfassung

In einem zellfreien System von Staphylococcus aureus SG 511 hemmen die Sideromycin-Antibiotica Danomycin und A 22 765 den Poly U-gesteuerten Einbau von Phenylalanin, dieser wird durch Albomycin nicht beeinflußt, durch Ferrimycin A1 sogar gesteigert. Für das Antibioticum A 22 765 wurde gezeigt, daß sich S-30 Extrakte A 22 765-sensibler und A 22 765-resistenter Zellen von S. aureus gleich verhalten; in keinem Falle konnte jedoch die durch A 22 765 bewirkte Hemmung durch Ferrioxamin B aufgehoben werden. Die auf Grund chemischer wie biologischer Merkmale als einheitliche Gruppe charakterisierten Sideromycine besitzen möglicherweise unterschiedliche Wirkungsmechanismen. Die Möglichkeit einer Antagonisierung der Sideromycin-Permeation durch die Sideramine wird diskutiert.

Summary

In a cell-free system obtained from Staphylococcus aureus SG 511, the sideromycin antibiotics danomycin and A 22,765 inhibit the poly U-directed incorporation of phenylalanine; albomycin has no influence on this incorporation, whereas ferrimycin A1 actually enhances it. In the case of the antibiotic A 22,765 it has been demonstrated that S-30 extracts from A 22,765-sensitive cells of S. aureus behave in the same way as those from A 22,765-resistant cells; in no instance, however, was ferrioxamine B able to counteract the inhibitory effect of A 22,765. The sideromycins, which are regarded as a homogeneous group on the basis of their chemical and biological characteristics, possibly have differing mechanisms of action. The possibility that sideromycin permeation may be susceptible to antagonism by sideramines is discussed.

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Knüsel, F., Schiess, B. & Zimmermann, W. The influence exerted by sideromycins on poly-U-directed incorporation of phenylalanine in the S-30 fraction of Staphylococcus aureus . Archiv. Mikrobiol. 68, 99–106 (1969). https://doi.org/10.1007/BF00413869

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