核酸酶
化学
反式激活crRNA
核糖核酸酶P
检出限
核糖核酸酶H
荧光
复式(建筑)
核糖核酸酶
脱氧核糖核酸酶ⅰ
脱氧核酶
分子生物学
清脆的
核酸内切酶
核酸
DNA
劈理(地质)
生物化学
酶
核糖核酸
色谱法
Cas9
基因
生物
基序列
古生物学
物理
量子力学
断裂(地质)
作者
Xinping Wang,Yi-Chuan Chen,Lixin Ma,Zhen Han,Yi Liu,Jie Qiao
出处
期刊:Talanta
[Elsevier]
日期:2023-05-01
卷期号:257: 124329-124329
被引量:2
标识
DOI:10.1016/j.talanta.2023.124329
摘要
Nuclease, such as RNase H and DNase I, plays key roles in plenty of cellular processes and could be potential therapeutic target for drug development. It is necessary to establish rapid and simple-to-use methods to detect nuclease activity. Herein, we develop a Cas12a-based fluorescence assay without any nucleic acid amplification steps for ultrasensitive detection of RNase H or DNase I activity. By our design, the pre-assembled crRNA/ssDNA duplex triggered the cleavage of fluorescent probes in the presence of Cas12a enzymes. However, the crRNA/ssDNA duplex was selectively digested with the addition of RNase H or DNase I, which leaded to fluorescence intensity changes. Under optimized conditions, the method exhibited good analytical performance, achieving a limit of detection (LOD) as low as 0.0082 U/mL for RNase H and 0.13 U/mL for DNase I, respectively. The method was feasible for analysis of RNase H in human serum and cell lysates, as well as for screening of enzyme inhibitors. Moreover, it can be adopted to image RNase H activity in living cells. Together, this study provides a facile platform for nuclease detection and could be expanded for other biomedical research and clinical diagnostics.
科研通智能强力驱动
Strongly Powered by AbleSci AI