Journal
TALANTA
Volume 182, Issue -, Pages 142-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.01.075
Keywords
Label-free; RNase H; Nicking enzyme; G-quadruplex; Thioflavin T
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Funding
- National Natural Science Foundation of China [21205142, 31370104]
- Research Innovation Program for Graduates of Central South University [2016zzts580, 2017zzts347]
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In this paper, we describe a novel, label-free and nicking enzyme-assisted fluorescence signal amplification strategy that demonstrates to be cost efficient, sensitive, and unique for assaying the RNase H activity and inhibition based on G-quadruplex formation using a thioflavin T (ThT) dye. This novel assay method is able to detect RNase H with a detection limit of 0.03 U /mL and further exhibits a good linearity R-2 = 0.9923 at a concentration range of 0.03-1 U/mL under optimized conditions. Moreover, the inhibition effect of gentamycin on the RNase H activity is also studied. This strategy provides a potential tool for the biochemical enzyme analysis and inhibitor screening.
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