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. 1973 Aug;4(2):178–185. doi: 10.1128/aac.4.2.178

Formation and Secretion of Induced Penicillinase in Protoplasts of Staphylococcus aureus

N W Coles 1, R Gross 1
PMCID: PMC444524  PMID: 4790937

Abstract

Conditions suitable for induced formation and secretion of penicillinase (EC 3.5.2.6) in protoplasts of Staphylococcus aureus were determined. No requirement was found for cells to be exposed to inducer prior to formation of protoplasts. Neither cell wall components nor mesosomes appeared to be necessary for induction or secretion. In medium containing 1.1 M sucrose about half of the formed enzyme was soluble, whereas in medium containing 0.37 M sodium succinate only about 10% of the penicillinase remained protoplast-bound. Low concentrations of polyanions (dextran sulfate and potassium polyvinyl-sulfonate) inhibited the formation of induced penicillinase, as did 4-acetamido-4′-isothiocyano-stilbene 2,2′-disulfonic acid. None of these compounds inhibited the activity of native penicillinase, and none would be expected to pass through the protoplast membrane. Penicillinase, denatured in 4 M urea, could be renatured by dilution in the presence of benzylpenicillin, and the above three inhibitors interfered strongly with this process. The results are taken as evidence that penicillinase may be secreted through the protoplast membrane in an incompletely folded form.

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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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