Abstract:
:Enzymes of the glutathione-dependent detoxification pathway (glutathione S-transferase and gamma-glutamyl-transpeptidase) were induced, and the glutathione pool was completely depleted by phenoxyacetic acid in Penicillium chrysogenum mycelia incubated for 15 h in a culture medium containing lactose as a carbon source and sodium glutamate as a nitrogen source. A significant increase in both the oxidised glutathione concentrations and the glutathione reductase activities were also observed. 1-Chloro-2,4-dinitrobenzene--a potent substrate and inducer of glutathione S-transferase-initiated very similar physiological changes but no beta-lactam production could be detected in this case. When (NH4)2HPO4 was used as a nitrogen source the penicillin biosynthesis was repressed and the induction of gamma-glutamyltranspeptidase by phenoxyacetic acid was hindered considerably.
journal_name
J Basic Microbioljournal_title
Journal of basic microbiologyauthors
Emri T,Pócsi I,Szentirmai Adoi
10.1002/jobm.3620370306subject
Has Abstractpub_date
1997-01-01 00:00:00pages
181-6issue
3eissn
0233-111Xissn
1521-4028journal_volume
37pub_type
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