Biotechnology Bulletin ›› 2018, Vol. 34 ›› Issue (4): 24-34.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0824

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Applications of Fungal Laccase in Green Chemistry

GONG Rui, SUN Kai, XIE Dao-yue   

  1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention,School of Resources and Environment,Anhui Agricultural University,Hefei 230036
  • Received:2017-10-15 Online:2018-04-20 Published:2018-05-04

Abstract: Laccase is a kind of extracellular multi-copper oxidase secreted by fungi. It is widely used in green environmental chemistry because of its multifunctional property. It is proved that the copper-cluster of laccase can catalyze one-electron oxidative of phenolic and non-phenolic substrates via yielding radical intermediates. Then these radical intermediates involved in oxidative coupling or bond rupture,resulting in substrate oxidation,decomposition or polymerization. At present,the methods for immobilization of laccase are primarily divided into four categories including encapsulation in a carrier,adsorption on a carrier,covalent binding,and cross-linking. Compared with the free laccase,the underlying reasons for immobilization of laccase are the need to enhance the activity,stability,and recyclability of fungal laccase. In this paper,we review the molecular composition,structural characteristics,and catalytic oxidation mechanism of fungal laccase. Additionally,the main methods,advantages and disadvantages for immobilization of laccase are comparably evaluated,mainly focusing on the latest advances in the transformation and/or degradation of organic contaminants,the decolorization of synthetic dye,the treatment of paper wastewater,food processing,bio-sensors,and bio-indicators of environmental quality. It is aimed at providing new theoretical evidences and guidance for the multi-functional application of fungal laccase in green chemistry.

Key words: fungal laccase, structural characteristics, immobilization technology, laccase applications, green chemistry