来自Ensifer adhaerens E-60的一种Sb(III) 特定的排放输送器
Ruixiang Yang1, Thiruselvam Viswanatham2, Shuangqin Huang1
1Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Microbiological research
|July 14, 2024
概括
研究人员发现了AntB,这是Ensifer adhaerens中的一种新型载体,它能对有毒的化合物产生抗性. 这一发现增强了对微生物抗耐药性及其在环境中的作用的理解.
科学领域:
- 环境微生物学 环境微生物学
- 生物化学 生物化学
- 毒理学 毒理学 毒理学
背景情况:
- 是广泛存在的环境毒素.
- 微生物拥有各种抗反耐药性,转化和挤出机制.
- 流体输送器在微生物排毒中起着至关重要的作用.
研究的目的:
- 在Ensifer adhaerens中识别和描述赋予抗耐药性的新型基因.
- 阐明识别载体AntB的功能及其监管机制.
- 了解在生物地球化学循环中的排放输送器的作用.
主要方法:
- 在Ensifer adhaerens E-60染色体上识别AntB主要促进体超级家族 (MFS) 载体.
- 对相邻的LysR型转录调节器LysRars的分析.
- 在大肠杆菌AW3110 (Δars) 中B基因的异质表达.
- 评估对Sb (III) 和Sb (V) 的耐药性,并测量细胞内抗氧化物度.
主要成果:
- AntB 载体对 Sb (III) 和 Sb (V) 都具有显著的抗性.
- LysRars 作为一个对As(III) /Sb(III) 响应的转录抑制剂,调节antB表达.
- 大肠杆菌中antB的异质表达降低了细胞内Sb (III) 水平,证实了它的排泄功能.
- 在AntB和LysRars两种类型中都发现了保存的氨酸残留物.
结论:
- 发现AntB,一个Sb(III) 流量载体,扩大了微生物抗耐药性的已知机制.
- LysRars调节器提供了对抗抗性基因的转录控制的见解.
- 这项研究有助于了解微生物在环境中的反循环和排毒中的作用.
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