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. 1968 Oct;16(10):1557–1563. doi: 10.1128/am.16.10.1557-1563.1968

Specificity of Penicillin Acylase of Fusarium and of Penicillium chrysogenum

H Vanderhaeghe 1, M Claesen 1, A Vlietinck 1, G Parmentier 1
PMCID: PMC547703  PMID: 4971722

Abstract

Extracts containing penicillin acylase were obtained by shaking the mycelium of Fusarium avenaceum and of Penicillium chrysogenum in 0.2 M sodium acetate or sodium chloride solution. The optimum pH for conversion of penicillin V into 6-aminopenicillanic acid (6-APA) by the enzyme of Fusarium was about 7.5, and the reaction velocity was increased by a rise in temperature from 27 to 37 C. Penicillin G and penicillins with an aliphatic side chain were cleaved much less readily than was penicillin V. With the enzyme preparation obtained from a nonpenicillin-producing strain of P. chrysogenum, the reaction rate was higher at pH 8.5 than at pH 7.5 and pH 6.5. The acylase of P. chrysogenum hydrolyzes penicillin V more readily than penicillin G. In a series of aliphatic penicillins, the amount of 6-APA formed through the action of this enzyme increased with the number of carbon atoms of the side chain. Penicillins with a glutaryl or an adipyl group as side chain were unaffected by the enzyme of Fusarium and of Penicillium. No reaction was observed upon incubation of penicillin N (with a D-aminoadipyl side chain) or isopenicillin N (with an L-aminoadipyl side chain) with Fusarium and Penicillium extract. When the carboxy group of the side chain of these penicillins was esterified, formation of 6-APA was observed upon incubation with Penicillium extract, whereas no 6-APA or only very small amounts were obtained by acylase of Fusarium.

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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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