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• W4304117549 abstract "Polynucleotide kinase (PNK), a bifunctional enzyme with 5'-kinase and 3'-phosphatase activities, plays an important role in DNA repair and is associated with various diseases. Here, we developed a primer-free, sensitive, and isothermal quantitative assay to detect PNK activity. In the presence of PNK, the 3'-phosphate group of the substrate was digested with 3'-OH, initiating the amplification reaction. Elongated dsDNA binds to the dsDNA-specific fluorescent dye EvaGreen, leading to a significant enhancement in fluorescence intensity. The limit of detection (LOD) of this method was 7.7 × 10-7 U μL-1, which is comparable or even superior to that of previously reported methods. This approach also showed good quantitative ability in complex cell lysates, indicating potential for biological sample analysis. Additionally, this facile and sensitive assay can be used to screen for PNK inhibitors. The proposed method provides a promising platform for sensitive PNK activity monitoring and inhibition screening for drug discovery and clinical treatment." @default.
• W4304117549 created "2022-10-11" @default.
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• W4304117549 date "2022-01-01" @default.
• W4304117549 modified "2023-09-30" @default.
• W4304117549 title "Phosphorothioated and phosphate-terminal dumbbell (PP-TD) probe-based rapid detection of polynucleotide kinase activity" @default.
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• W4304117549 doi "https://doi.org/10.1039/d2an01431a" @default.
• W4304117549 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36214814" @default.
• W4304117549 hasPublicationYear "2022" @default.
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