基于转录因子的全细胞酸盐生物传感器的设计-制造-测试-学习指导工程.
Zihan Gao1, Maria Suarez-Diez1, Pieter Candry1
1Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.
ACS synthetic biology
|February 8, 2026
概括
这项研究使用代的设计-构建-测试-学习周期和统计建模设计了一种全细胞酸盐生物传感器. 优化的生物传感器显著改善了动态范围,并减少了泄漏表达,以精确监测代谢物.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 生物传感器开发开发
背景情况:
- 全细胞生物传感器对于代谢物监测至关重要,但面临着狭窄的动态范围和高泄漏表达等局限性.
- 优化生物传感器性能对于更广泛的代谢调节和查应用至关重要.
研究的目的:
- 系统地开发和优化以转录因子为基础的Escherichia coli中的pyruvate生物传感器.
- 为了增强生物传感器的动态范围,并使用设计-构建-测试-学习 (DBTL) 工作流来最大限度地减少泄漏表达.
主要方法:
- 采用了两个代的设计-构建-测试-学习 (DBTL) 周期来优化生物传感器.
- 利用实验设计 (DoE) 和统计建模 (Akaike信息标准) 来探索促进体和核糖体结合部位 (RBS) 效应.
- 量化细胞内pyruvate水平以确认生物传感器的操作范围.
主要成果:
- 第一个DBTL循环产生了一种生物传感器,对0.05-10毫米范围内的pyruvate有反应.
- 在能源部指导的第二个DBTL周期中,确定了RBS对动态范围和信号跨度的关键影响.
- 优化的菌株显示动态范围增加了18.54倍,泄漏表达减少了37.22倍.
- 证实了用于细胞内酸盐量化DCW的1.23-6.81μmol/g的操作范围.
结论:
- 与统计建模相结合的DBTL循环为生物传感器工程提供了一个强大的框架.
- 开发的pyruvate生物传感器为精确的代谢调节和查应用提供了更好的性能.
- 这种系统的方法推动了强大的全细胞生物传感器的开发.
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