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奇迹蛋白 (Proteus mirabilis) Ch8的Cd抗性机制通过固定和排毒来实现
Shu-Qi Niu1, Hao-Ran Song2, Xuan Zhang3
1Key Laboratory of Characteristic Chinese Medicine Resources in Southwest China, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, P. R. China; College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China; Chongqing Key Laboratory of Sichuan-Chongqing Co Construction for Diagnosis and Treatment of Infectious Diseases Integrated Traditional Chinese and Western Medicine, PR China.
奇迹蛋白Ch8通过多种解毒途径,包括细胞外吸附和增强的抗氧化防御,表现出高耐药性,使其成为改善污染环境的微生物修复的有希望的药物.
科学领域:
- 环境微生物学 环境微生物学
- 生物修复是一种生物修复.
- 毒理学 毒理学 毒理学
背景情况:
- (Cd) 污染对全球环境构成重大威胁.
- 微生物修复为改善土壤提供了一个环保的解决方案.
- 的毒性阻碍了微生物修复策略的有效性.
研究的目的:
- 为了研究细菌对压力的耐药性机制.
- 识别和表征一种高度耐的细菌菌株,用于修复应用.
- 为了阐明Proteus mirabilis中解毒的分子基础 Ch8.8.
主要方法:
- 整个基因组测序以确定细菌菌株为Proteus mirabilis Ch8.8. 这一细菌菌株.
- 扫描电子显微镜使用能量分散光谱 (SEM-EDS) 和里埃转换红外光谱 (FTIR) 来分析细胞形态和功能组.
- 评估抗氧化酶活性 (SOD,CAT) 和抗氧化物质含量 (GSH).
- 对排泄 (AcrA, TolC) 和抗氧化基因 (SodB, SodC, Tpx) 的定量基因表达分析.
主要成果:
- 奇迹性蛋白 Ch8 具有较高的抗性 (高达 1400 mg/L).
- 碳酸的生物吸收主要通过外聚糖 (EPS) 的分泌和相互作用进行介导,在500mg/L碳酸时具有显著的吸附能力 (38.80mg/g).
- 观察到增强的抗氧化防御,SOD (245.47%),CAT (179.52%) 和GSH (241.81%) 的显著增加在500 mg/L Cd.
- 检测到RND排泄基因 (AcrA,TolC) 和抗氧化基因 (SodB,SodC,Tpx) 的升级,特别是SodB.
结论:
- 奇迹蛋白Ch8采用多种策略,包括EPS介导的生物吸收和强大的抗氧化系统,以耐受高度的.
- 鉴定出的抗性机制为在实际的生物修复中利用这种菌株提供了基础.
- 了解这些机制对于优化污染土壤的微生物修复至关重要.
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