Enhanced laccase production in white-rot fungus Rigidoporus lignosus by the addition of selected phenolic and aromatic compounds.
The white rot fungus Rigidoporus lignosus produces substantial amounts of extracellular laccase, a multicopper blue oxidase which is capable of oxidizing a wide range of organic substrates. Laccase production can be greatly enhanced in liquid cultures supplemented with various aromatic and phenolic compounds. The maximum enzyme activity was reached at the 21st or 24th day of fungal cultivation after the addition of inducers. The zymograms of extracellular fluid of culture preparation in the presence of inducers, at maximum activity day, revealed two bands with enzymatic activity, called Lac1 and Lac2, having different intensities. Lac2 band shows the higher intensity which changed with the different inducers. Laccase induction can be also obtained by adding to the culture medium olive mill wastewaters, which shows a high content of phenolic compounds.
Cambria
Maria Teresa
MT
Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, Catania, Italy.
Ragusa
Santa
S
Calabrese
Vittorio
V
Cambria
Antonio
A
D001487:Basidiomycota / Q000187:drug effects* / Q000201:enzymology*; D004591:Electrophoresis, Polyacrylamide Gel; D004790:Enzyme Induction / Q000187:drug effects; D045604:Extracellular Fluid / Q000187:drug effects / Q000378:metabolism; D006841:Hydrocarbons, Aromatic / Q000494:pharmacology*; D007220:Industrial Waste / Q000032:analysis; D007527:Isoenzymes / Q000096:biosynthesis; D042845:Laccase / Q000096:biosynthesis* / Q000378:metabolism; D031658:Olea / Q000737:chemistry; D010636:Phenols / Q000494:pharmacology*; D013997:Time Factors; D014865:Waste Disposal, Fluid
D006841:Hydrocarbons, Aromatic; D007220:Industrial Waste; D007527:Isoenzymes; D010636:Phenols; D042845:Laccase