A genetically-encoded biosensor for direct detection of perfluorooctanoic acid.

A genetically-encoded biosensor for direct detection of perfluorooctanoic acid.
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一种直接检测全氟辛酸的基因编码生物传感器。

DOI:
10.1038/s41598-023-41953-1
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发表时间:
2023-09-13
期刊:
影响因子:
4.6
通讯作者:
--
中科院分区:
综合性期刊3区
文献类型:
--
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在监管官员设定的低水平下测定饮用水中的全氟烷基和多氟烷基物质(PFAS)一直是传感器开发研究人员的主要焦点。然而,越来越明显的是,在十亿分之一甚至百万分之一的水平上检测土壤、食品和消费品中的这些污染物是相关的和必要的。本文以人肝脂肪酸结合蛋白(hLFABP)为基础构建了一种用于PFOA快速检测的荧光生物传感器。通过将环状排列的绿色荧光蛋白(cp.GFP)偶联到分离的hLFABP构建体上,该生物传感器能够检测PBS和环境水样中的全氟辛酸PFOA,检出限分别为236和330 ppb。此外,E.大肠杆菌细胞胞质表达的蛋白质为基础的传感器被证明可以快速检测PFOA,证明全细胞传感的可行性。总之,这项工作表明了一个平台技术,利用循环排列的GFP和分裂的hLFABP共轭物作为PFOA的无标记光学生物传感器。
Determination of per- and polyfluoroalkyl substances (PFAS) in drinking water at the low levels set by regulatory officials has been a major focus for sensor developing researchers. However, it is becoming more apparent that detection of these contaminants in soils, foods and consumer products is relevant and necessary at part per billion and even part per million levels. Here, a fluorescent biosensor for the rapid detection of PFOA was engineered based on human liver fatty acid binding protein (hLFABP). By conjugating circularly permuted green fluorescent protein (cp.GFP) to a split hLFABP construct, the biosensor was able to detect perfluorooctanoic acid PFOA in PBS as well as environmental water samples with LODs of 236 and 330 ppb respectively. Furthermore, E. coli cells cytosolically expressing the protein-based sensor were demonstrated to quickly detect PFOA, demonstrating feasibility of whole-cell sensing. Overall, this work demonstrates a platform technology utilizing a circularly permuted GFP and split hLFABP conjugate as a label-free optical biosensor for PFOA.
用于环境质量监测的生物传感器的最新趋势。
DOI: 10.3390/s22041513
发表时间: 2022-02-15
期刊: Sensors (Basel, Switzerland)
影响因子: --
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影响因子: 11.4
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