Physiological aspects of the regulation of extracellular enzymes ofphanerochaete chrysosporiwn

  • Carlos G. dosoretz
  • Hans E. grethlein
Session 2 Applied Biological Research I


The formation and decay of lignolytic enzymes, along with the generation of other extracellular metabolites in submerged cultures ofPhanerochaete chrysosporium, were studied under different physiological conditions. Whereas lignin peroxidase (LiP) was detectable only in a narrow range of O2 tension and nitrogen concentration, manganese peroxidase (MnP) reached considerable levels over a broad range. The decay of LiP and MnP activities under lignolytic conditions paralleled that of heme and total proteins. The conditions that decrease or suppress LiP or MnP activities resulted in high levels of extracellular protease activity and/or polysaccharides.

Index Entries

Phanerochaete chrysosporium fungal physiology ligninases heme protein peroxidases protease microbial exopoly-saccharides 


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Copyright information

© Humana Press Inc. 1991

Authors and Affiliations

  • Carlos G. dosoretz
    • 1
    • 2
  • Hans E. grethlein
    • 1
    • 2
  1. 1.Department of Chemical Engineering and Center for Microbial EcologyMichigan State UniversityEast Lansing
  2. 2.Michigan Biotechnology InstituteLansing

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