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Production of a high level of laccase by submerged fermentation at 120-L scale of Cerrena unicolor C-139 grown on wheat bran.

Abstract
Submerged fermentation in a stirred bioreactor of the white rot fungus Cerrena unicolor C-139 was done at a 120-L scale in the presence of wheat bran as a cheap lignocellulosic substrate for fungus growth and laccase production. Enzyme monitoring showed that laccase production started after 2 days of cultivation, attaining a maximum activity of 416.4 U·mL(-1) at day 12 of fermentation. After treatment of culture liquid by successive micro- and ultrafiltration (5kDa), a liquid concentrate containing 22203176 units of laccase was obtained. Obtaining large amount of laccase is essential for various industrial applications, including detoxification of industrial effluents, textile and petrochemical industries, polymer synthesis, bioremediation of contaminated area, stabilization of beverages, production of cosmetics, manufacture of anti-cancer drugs, and nanobiotechnology. The cultivation method and the fungal strain used here provided a substantial amount of enzyme produced at a price lower than 0.01 € cent/unit enzyme.
AuthorsGeorge Songulashvili, Daniel Spindler, Gloria A Jimenéz-Tobón, Charles Jaspers, Gerhard Kerns, Michel J Penninckx
JournalComptes rendus biologies (C R Biol) Vol. 338 Issue 2 Pg. 121-5 (Feb 2015) ISSN: 1768-3238 [Electronic] France
PMID25573330 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
CopyrightCopyright © 2014 Académie des sciences. Published by Elsevier SAS. All rights reserved.
Chemical References
  • Culture Media
  • Dietary Fiber
  • Fungal Proteins
  • Laccase
Topics
  • Bioreactors
  • Centrifugation
  • Culture Media (pharmacology)
  • Dietary Fiber
  • Fermentation
  • Fungal Proteins (biosynthesis, genetics, isolation & purification)
  • Hydrogen-Ion Concentration
  • Industrial Microbiology (methods)
  • Laccase (biosynthesis, genetics, isolation & purification)
  • Molecular Weight
  • Mycology (methods)
  • Polyporaceae (enzymology, growth & development)
  • Temperature
  • Ultrafiltration

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