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Folia Microbiologica

, Volume 46, Issue 2, pp 127–132 | Cite as

Penicillin V production byPenicillium chrysogenum in the presence of Fe3+ and in low-iron culture medium

  • É. Leiter
  • T. Emri
  • G. Gyémánt
  • I. Nagy
  • Imre Pócsi
  • G. Winkelmann
  • István Pócsi
Papers

Abstract

Late-exponential-phasePenicillium chrysogenum mycelia grown in a complex medium possessed an intracellular iron concentration of 650 μmol/L (2.2±0.6 μmol per g mycelial dry mass). This iron reserve was sufficient to ensure growth and antibiotic production after transferring mycelia into a defined low-iron minimal medium. Although the addition of Fe3+ to the Fe-limited cultures increased significantly the intracellular iron levels the surplus iron did not influence the production of penicillin V. Supplements of purified majorP. chrysogenum siderophores (coprogen and ferrichrome) into the fermentation media did not affect the β-lactam production and intracellular iron level. Neither 150 nor 300 μmol/L extracellular Fe3+ concentrations disturbed the glutathione metabolism of the fungus, and increased the oxidative stress caused by 700 mmol/L H2O2. Nevertheless, when iron was applied in the FeII oxidation state the oxidative cell injuries caused by the peroxide were significantly enhanced.

Keywords

Penicillium Chrysogenum Intracellular Iron Penicillin Production Phenoxyacetic Acid Define Culture Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

DCF

2′,7′-dichlorofluorescein

GR

glutathione reductase

GSH

glutathione

GSSG

glutathione disulfide

IPNS

isopenicillin N synthase

PAA

phenoxyacetic acid

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Copyright information

© Folia Microbiologica 2001

Authors and Affiliations

  • É. Leiter
    • 1
  • T. Emri
    • 1
  • G. Gyémánt
    • 2
  • I. Nagy
    • 3
  • Imre Pócsi
    • 1
  • G. Winkelmann
    • 4
  • István Pócsi
    • 1
  1. 1.Department of Microbiology and Biotechnology, Faculty of ScienceUniversity of DebrecenDebrecenHungary
  2. 2.Department of Biochemistry, Faculty of ScienceUniversity of DebrecenDebrecenHungary
  3. 3.Department of Inorganic and Analytical Chemistry, Faculty of ScienceUniversity of DebrecenDebrecenHungary
  4. 4.Institute of Microbiology and BiotechnologyUniversity of TübingenTübingenGermany

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