Current Microbiology

, Volume 18, Issue 5, pp 303–306 | Cite as

Catabolite repression of the synthesis of inducible polygalacturonase and pectinesterase byAspergillus niger sp.

  • María Cristina Maldonado
  • Ana María Strasser de Saad
  • Danley Callieri
Article

Abstract

The synthesis of pectinesterase (PE) and polygalacturonase (PG) by a strain ofAspergillus niger isolated from rotten lemons was repressed by glucose, even in the presence of the inducer. The production of both enzymes started again once the sugar was used up, or when the mycelium was washed free of glucose and incubated in a glucose-free medium containing the inducer; this proved the reversibility of the repression mechanism. The effect of glucose was also tested in the absence of transcription. The results obtained suggest that repression occurs at the translational level.

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Copyright information

© Springer-Verlag New York Inc. 1989

Authors and Affiliations

  • María Cristina Maldonado
    • 1
  • Ana María Strasser de Saad
    • 1
  • Danley Callieri
    • 1
  1. 1.Department of Industrial Microbiology and General Microbiology, Faculty of Biochemistry, Chemistry, and PharmacyNational University of TucumánTucumánArgentina

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