Synthetic promoter based azide biosensor toolkit to advance chemical-biology

Synthetic promoter based azide biosensor toolkit to advance chemical-biology
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基于合成启动子的叠氮化物生物传感器工具包,以推进化学生物学

DOI:
10.1101/2020.07.08.193060
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发表时间:
2020
期刊:
bioRxiv
影响因子:
--
通讯作者:
Chundawat, S. P.
Chundawat, S. P.
中科院分区:
--
文献类型:
--
作者:
Bandi, C. K.;Skalenko, K. S.;Agrawal, A.;Sivaneri, N.;Thiry, M.;Chundawat, S. P.

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使用基于生物正交化学的方法在活细胞内进行实时叠氮化物或叠氮化物官能化分子检测对于推进化学生物学具有革命性意义。这些方法已经实现了多种应用,包括理解细胞糖基化途径的作用、鉴定患病细胞和基于叠氮基的治疗药物的靶向递送。然而,虽然经典的技术只适用于体外检测这些功能团,即使是最近的生物正交检测方法需要昂贵的传感试剂,也不能选择性地识别无机叠氮化物。在这里,我们报告了一个基于体内合成启动子的叠氮生物传感器工具包,以选择性地检测叠氮阴离子。设计了一个混杂的氰酸酯特异性启动子,用于检测叠氮化合物并快速诱导大肠杆菌表达绿色荧光蛋白(GFP)。我们的合成叠氮化物操纵子允许高度可调的GFP表达,优于经典的lac-operon,并且还提供了一种替代的低成本蛋白质表达系统。最后,我们展示了该工具包的实用性,在体内生物正交反应生物传感和糖工程为基础的应用。
Real-time azide or azido-functionalized molecular detection inside living cells using bioorthogonal chemistry-based approaches has been revolutionary to advancing chemical-biology. These methods have enabled diverse applications ranging from understanding the role of cellular glycosylation pathways, identifying diseased cells, and targeting delivery of azido-based therapeutic drugs. However, while classical techniques were applicable only toin-vitrodetection of such functional groups, even recent bioorthogonal based-detection methods require expensive sensing reagents and also cannot selectively identify inorganic azide. Here, we report anin-vivosynthetic promoter based azide biosensor toolkit to selectively detect azide anions. A promiscuous cyanate-specific promoter was engineered to detect azide and rapidly induce expression of green fluorescent protein (GFP) inEscherichia coli. Our synthetic azide operon allows highly-tunable GFP expression, outperforming the classiclac-operon, and also offers an alternative low-cost protein expression system. Finally, we showcase the utility of this toolkit forin-vivobioorthogonal reaction biosensing and glycoengineering based applications.
阿齐多西林治疗肠球菌败血症。
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