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. 1972 Dec;112(3):1346–1352. doi: 10.1128/jb.112.3.1346-1352.1972

Location of Acid Phosphatase and β-Fructofuranosidase Within Yeast Cell Envelopes

Wilfred N Arnold 1
PMCID: PMC251569  PMID: 4565542

Abstract

After 16 hr of incubation in a low-phosphate, aerated medium, bakers' yeast was obtained with a high titer of acid phosphatase (EC 3.1.3.2) and β-fructofuranosidase (EC 3.2.1.26). All of the β-fructofuranosidase and 75% of the acid phosphatase were easily released by mechanical disruption in a French pressure cell. The cell wall suffered a limited number of cracks, but this was sufficient for the co-release of these enzymes. Both enzymes were subject to autolytic release, although correlation was inconclusive because of the relative instability of acid phosphatase. The data are consistent with the bulk of the two enzymes being located in the periplasmic space. Ethylacetate treatments yielded ghosts with high β-fructofuranosidase but low acid phosphatase activities. The surviving acid phosphatase was not representative of that in live cells. It was resistant to release by mechanical disruption and showed a high susceptibility to heat inactivation. The β-fructofuranosidase in live cells and in ethylacetatetreated cells exhibited polydispersity in heat inactivation susceptibility; but the kinetics were indistinguishable, and facile release by mechanical disruption was shown in both cases.

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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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