数字农科院2.0

New application of a dye-decolorizing peroxidase immobilized on magnetic nanoparticles for efficient simultaneous degradation of two mycotoxins

文献类型： 外文期刊

作者： Du, Xinling;Zheng, Mumin;Zhang, Han;Qiu, Yangyu;Ji, Fuchun;Nie, Zishen;Xu, Huidong;Li, Xiaoxuan;Wu, Shijia;Wang, Zhouping;Xing, Fuguo;Xia, Yu

作者机构：

关键词： Dye-decolorizing peroxidase;Magnetic nanoparticle;Enzyme immobilization;Mycotoxin;Degradation

期刊名称： FOOD CHEMISTRY

ISSN： 0308-8146

年卷期： 2024 年 463 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Nowadays the enzymatic approaches are the most promising strategies for mycotoxins detoxification in food stuffs. Herein, the dye-decolorizing peroxidase RhDypB from Rhodococcus jostii was studied for its ability to degrade two mycotoxins in both free and the immobilized enzyme forms. This enzyme was recombinantly expressed and purified, while Fe3O4 nanoparticles were prepared and modified with chitosan as the immobilization carrier. The immobilized enzyme Fe3O4@CS@RhDypB demonstrated degradation rate of 85.61 % toward aflatoxin B-1, while it was firstly found to be able to degrade zearalenone with the rate of 86.52 %, at pH 4.0 on 30 degrees C. The degradation products were identified as aflatoxin Q(1) and 15-OH-ZEN respectively. After 5 cycles of reuse, Fe3O4@CS@RhDypB still exhibited degradation rates of 38.50 % and 49.76 % toward the mycotoxins, indicating its high reusability. Moreover, Fe3O4@CS@RhDypB exhibited excellent stability after 10 days of storage. This work identified potential applications of nanoparticle-immobilized enzyme for biodegradation of mycotoxins in food industry.

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