Decolorization and detoxication of malachite green by engineered saccharomyces cerevisiae expressing novel thermostable laccase from trametes trogii

Bioresour Technol. 2024 Mar 13:130591. doi: 10.1016/j.biortech.2024.130591. Online ahead of print.ABSTRACTMalachite Green (MG) is a widely used industrial dye that is hazardous to health. Herein, the decolourisation and detoxification of MG were achieved using the engineered Saccharomyces cerevisiae expressing novel thermostable laccase lcc1 from Trametes trogii. The engineered strain RCL produced a high laccase activity of 121.83 U L-1. Lcc1 was stable at temperatures ranging from 20 ℃ to 60 ℃ and showed a high tolerance to organic solvents. Moreover, Lcc1 could decolorize different kinds of dyes (azo, anthraquinone and triphenylmethane), among which, the decolorization ability of MG is the highest, reaching 95.10 %, and the decolorization rate of other triphenylmethane dyes also over 50 %. The RCL decolorized about 95 % of 50 mg/L of MG dye in 10 h at 30 ℃. The MG degradation products were analyzed. The industrial application potential of the RCL was evaluated by treating industrial wastewater and the decolourisation rates were over 90 %.PMID:38490463 | DOI:10.1016/j.biortech.2024.130591

Source: Bioresource Technology - March 15, 2024 Category: Biotechnology Authors: Xiaofei Song Yudong Shan Longyu Cao Xiuwen Zhong Xikai Wang Yan Gao Kun Wang Weixia Wang Tingheng Zhu Source Type: research