高抗反耐药性菌株 肠杆菌 sp. Z1调解了三氧化的生物矿物化
Zijie Zhou1, Hongbo Yu1, Gejiao Wang1
1National Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
Environment international
|December 25, 2024
概括
这项研究揭示了Enterobacter sp.如何. Z1通过pyruvate-HMG-CoA路径将有毒的 (Sb) 转化为不溶性三氧化 (Sb2O3). 这种微生物生物矿化过程是理解抗氧的关键.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 生物矿物化 生物矿物化
背景情况:
- 由于其毒性和致癌性,反 (Sb) 污染是一个日益严重的环境问题.
- 微生物转化可溶性反成不溶性矿物质的机制尚不清楚.
研究的目的:
- 为了阐明参与生物矿化中的微生物途径.
- 为了确定能够将可溶性抗氧化物转化为不溶性形式的细菌菌株.
- 了解特定的代谢途径和基因在抗耐药性和生物矿物化中的作用.
主要方法:
- 对抗氧耐药细菌菌株 (Enterobacter sp. Z1).1).Z1).Z1).Z1).Z1).Z1).Z1).Z1).Z1).Z1.Z1.Z1.Z1.Z1.Z1.Z1.Z1.Z1.Z1.Z1.
- 欧米克分析以确定受暴露影响的代谢途径.
- 基因操纵 (基因淘汰和补充) 来调查aceE基因的作用.
- 使用不同的碳来源和化学定义的介质进行生物矿化试验.
主要成果:
- 肠道细菌 sp. 肠道细菌 sp. Z1对酸酸[Sb(III]具有很高的耐药性,并通过生物矿物化产生三氧化 (Sb2O3).
- 在Sb的存在下,pyruvate代谢和DL-3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) 的积累受到上调.
- 使用酸盐作为唯一的碳来源显著增强了Sb(III) 生物矿物化 (90.4%).
- AceE基因淘汰损害了Sb(III) 生物矿物化和降低了细胞内pH值,AceE显示了对Sb(III) 的结合亲和力.
结论:
- 酸盐-HMG-CoA通路被确定为Sb生物矿化机制,促进Sb离子的释放和维持细胞内pH值.
- 通过结合Sb (III) 和影响细胞内pH,AceE在Sb (III) 生物矿物化中起着至关重要的作用.
- 这项研究为Sb生物地球化学循环和抗氧化物污染的潜在生物修复策略提供了关键的见解.
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