Real-Time Temperature Sensing Using a Ratiometric Dual Fluorescent Protein Biosensor.

Real-Time Temperature Sensing Using a Ratiometric Dual Fluorescent Protein Biosensor.
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DOI:
10.3390/bios13030338
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发表时间:
2023-03-03
期刊:
Biosensors
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其他
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生物和化学反应样品内的精确温度控制以及仪器校准对于诊断、制药和化学工业至关重要。这对于通常用于实时PCR应用和差示扫描荧光测定法的微升规模的反应尤其具有挑战性。在这里,我们描述了一个简单的,廉价的比率双荧光蛋白温度生物传感器(DFPTB)的发展。循环三绿色荧光蛋白和单体红色荧光蛋白的组合使得能够量化相对温度变化并识别4-70 °C的宽温度范围内的温度差异。在pH值为7.2的标准磷酸盐缓冲盐水条件下,在25-42 °C的生物学相关温度范围内实现了6.7% °C−1的最大灵敏度和0.1 °C的精确度。良好的温度敏感性,实现了在各种生物缓冲液和pH值范围从4.8到9.1。DFPTB可用于纯化或混合的细菌封装形式,为体外和体内拓扑精确温度测量应用铺平了道路。
Accurate temperature control within biological and chemical reaction samples and instrument calibration are essential to the diagnostic, pharmaceutical and chemical industries. This is particularly challenging for microlitre-scale reactions typically used in real-time PCR applications and differential scanning fluorometry. Here, we describe the development of a simple, inexpensive ratiometric dual fluorescent protein temperature biosensor (DFPTB). A combination of cycle three green fluorescent protein and a monomeric red fluorescent protein enabled the quantification of relative temperature changes and the identification of temperature discrepancies across a wide temperature range of 4–70 °C. The maximal sensitivity of 6.7% °C−1 and precision of 0.1 °C were achieved in a biologically relevant temperature range of 25–42 °C in standard phosphate-buffered saline conditions at a pH of 7.2. Good temperature sensitivity was achieved in a variety of biological buffers and pH ranging from 4.8 to 9.1. The DFPTB can be used in either purified or mixed bacteria-encapsulated formats, paving the way for in vitro and in vivo applications for topologically precise temperature measurements.
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