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. 1974 Dec;120(3):1012–1016. doi: 10.1128/jb.120.3.1012-1016.1974

Cellular Location of Degradative Enzymes in Staphylococcus aureus

K M Nugent 1, E Huff 1, R M Cole 1, T S Theodore 1
PMCID: PMC245878  PMID: 4373433

Abstract

Staphylococus aureus, ATCC 6538P, was fractionated into protoplast membranes, mesosomal vesicles, periplasm, and cytoplasm. These fractions and the culture fluid were then assayed for various degradative enzyme activities. They were not restricted to a single fraction nor dispersed homogeneously, but were distributed predominantly (on the basis of specific activity) as follows: nuclease in the culture fluid; alkaline phosphatase, 5′-nucleotidase, and acid phosphatase in the periplasm; adenosine triphosphatase in the protoplast membrane; and protease (low levels) in mesosomal vesicles. No significant esterase nor cell wall hydrolytic activity was found in any fraction. S. aureus 80/81 was studied for penicillinase activity after induction with benzyl penicillin; this enzyme was localized in the mesosomal vesicles. Electron microscopy did not reveal any ultrastructural changes associated with secretion of the extracellular fraction. Overall, these studies demonstrate that degradative enzymes are located in several surface compartments and that, therefore, the mesosome does not function as a prototype lysosome in S. aureus.

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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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