文献类型： 外文期刊
作者： Song, Jinlong 1 ; Hao, Guijie 2 ; Liu, Lu 1 ; Zhang, Hongyu 1 ; Zhao, Dongxue 1 ; Li, Xingyang 1 ; Yang, Zhen 1 ; Xu, Jinhua 1 ; Ruan, Zhiyong 4 ; Mu, Yingchun 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Control Qual & Safety Aquat Prod, Minist Agr & Rural Affairs, Beijing 100141, Peoples R China
2.Zhejiang Inst Freshwater Fisheries, Key Lab Hlth Freshwater Aquaculture, Minist Agr & Rural Affairs, Key Lab Freshwater Aquaculture Genet & Breeding Z, Huzhou 313001, Peoples R China
3.Bohai Univ, Coll Food Sci & Engn, Jinzhou 121013, Peoples R China
4.CAAS, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.996； 五年影响因子：5.516 ）
ISSN： 2045-2322
年卷期： 2021 年 11 卷 1 期
页码：
收录情况： SCI
摘要： Sulfamethoxazole (SMX) is the most commonly used antibiotic in worldwide for inhibiting aquatic animal diseases. However, the residues of SMX are difficult to eliminate and may enter the food chain, leading to considerable threats on human health. The bacterial strain Sphingobacterium mizutaii LLE5 was isolated from activated sludge. This strain could utilize SMX as its sole carbon source and degrade it efficiently. Under optimal degradation conditions (30.8 degrees C, pH 7.2, and inoculum amount of 3.5 x 10(7) cfu/mL), S. mizutaii LLE5 could degrade 93.87% of 50 mg/L SMX within 7 days. Four intermediate products from the degradation of SMX were identified and a possible degradation pathway based on these findings was proposed. Furthermore, S. mizutaii LLE5 could also degrade other sulfonamides. This study is the first report on (1) degradation of SMX and other sulfonamides by S. mizutaii, (2) optimization of biodegradation conditions via response surface methodology, and (3) identification of sulfanilamide, 4-aminothiophenol, 5-amino-3-methylisoxazole, and aniline as metabolites in the degradation pathway of SMX in a microorganism. This strain might be useful for the bioremediation of SMX-contaminated environment.
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