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Microbial Biosensors

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Rapid Synthesis and Screening of Chemically Activated Transcription Factors with GFP-based Reporters

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研究和设计一种基于1,2-二醇响应转录因子的生物传感器.

Yuxi Teng¹, Xinyu Gong¹, Jianli Zhang¹

¹School of Chemical, Materials and Biomedical Engineering, College of Engineering, The University of Georgia, Athens, Georgia 30602, United States.

ACS synthetic biology

|July 5, 2024

概括

研究人员通过修改PocR转录因子来设计了一种1,2-propanediol (1,2-PD) 生物传感器. 这种增强的生物传感器提供了更好的动态和操作范围,扩大了其在代谢工程和生物生产中的实用性.

关键词:

1,2-二醇的使用方法这就是PocRR.的RNA聚合酶招募器.双功能的调节.生物传感器生物传感器短链酒精是一种短链酒精.

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科学领域:

代谢工程是代谢工程.
合成生物学合成生物学
分子生物学分子生物学

背景情况:

基于转录因子 (TF) 的生物传感器对于代谢工程至关重要,但其种类有限.
需要新的生物传感器来满足各种生物生产目标.

研究的目的:

来自*Salmonella typhimurium*的1,2-propanediol (1,2-PD) 响应转录激活剂PocR进行工程,以扩大生物传感器的范围.
增强PocR的动态和操作范围,以提高*E. coli*中的性能.

主要方法:

在大肠杆菌中对PocR进行异质性表征和乱交性测试.
蛋白质结构预测 (AlphaFold) 和突变发生,以探索PocR的机制.
设计PocR变种 (PocR-F46R/G105D,PocR-ARE) 和促进器工程,以创建一个双功能调节器.

主要成果:

最初的PocR表征显示,由于促进体结合,操作和动态范围有限.
工程变体显示了诱导特异性 (甘油) 的改变,并显著改善了动态 (6.7倍) 和操作 (0-20 mM 1,2-PD) 范围.
成功将PocR转换为抑制剂,并开发了一种由1,2-PD诱导的双功能调节系统.

结论:

这项研究成功设计了一种对1,2-PD敏感的转录激活剂PocR,显著提高了其性能.
已开发的变种提供了糖醇反应激活剂和多功能1,2-PD诱导的双功能调节器,扩大了生物传感器工具箱.
这项工作突出了探索和利用未被充分探索的转录激活剂在生物技术应用中的潜力.