DNA/RNA chimera-templated copper nanoclusters for label-free detection of reverse transcription-associated ribonuclease H

DNA/RNA chimera-templated copper nanoclusters for label-free detection of reverse transcription-associated ribonuclease H
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DNA/RNA 嵌合体模板铜纳米簇用于逆转录相关核糖核酸酶 H 的无标记检测

DOI:
10.1016/j.snb.2020.128072
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发表时间:
2020-08
期刊:
Sensors and Actuators B: Chemical
影响因子:
--
通讯作者:
Qing Taiping
Qing Taiping
中科院分区:
其他
文献类型:
--
作者:
Zhang Kaiwu;Wang Xuan;Long Caicheng;Xu Jin;Jiang Zixin;Feng Bo;Zhang Peng;Fei Junjie;Qing Taiping

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以DNA为模板的荧光铜纳米团簇(DNA-CuNCs)在生化分析中具有巨大的应用潜力。然而,他们中的大多数都集中在DNA相关的传感。在这里,我们设计了一个发夹DNA/RNA嵌合链的荧光CuNC的形成,并进一步将其应用于检测逆转录相关核糖核酸酶H(RNase H)。以DNA/RNA嵌合体为模板的铜纳米团簇(DNA/RNA-CuNCs)具有与DNA-CuNCs相似的光谱性质。在RNase H的存在下,嵌合体中的RNA片段被水解并释放短的寡核苷酸,其不能使荧光CuNC尺寸化。验证了从复杂样品中检测RNase H和筛选抑制剂的能力。该策略对RNase H表现出高灵敏度,可检测的最低浓度为5.5 × 10−4U mL-1,低于已开发的荧光方法。这项工作将为金属纳米团簇的新模板设计开辟新的思路,并拓宽其在RNA相关传感中的应用。
DNA templated fluorescent copper nanoclusters (DNA-CuNCs) have demonstrated enormous potential for biochemical analysis. However, most of them are focused on DNA-related sensing. Here, we designed a hairpin DNA/RNA chimeric chain for the formation of fluorescent CuNCs and further applied it to detect reverse transcription-associated ribonuclease H (RNase H). The DNA/RNA chimera templated copper nanoclusters (DNA/RNA-CuNCs) exhibited similar spectral properties with DNA-CuNCs. In the presence of RNase H, the RNA segment in chimera is hydrolyzed and release short oligonucleotides, which fail to synthsize fluorescent CuNCs. The capabilities for RNase H detection from complex samples and screening of inhibitors were verified. This strategy exhibited high sensitivity for RNase H with a detectable minimum concentration of 5.5 × 10−4U mL-1, which is lower than the developed fluorescent methods. This work will open up new thoughts to design new template for metal nanoclusters and broaden their application in RNA-related sensing.
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