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Updated: Mar 23, 2026

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
Real-time monitoring of DNA methyltransferase activity using a hemimethylated smart probe
Shunxin Jin1, Haisheng Liu1, Kun Xia1
1State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China.
Abstract:
A real-time assay for DNA methyltransferase (MTase) activity has been developed. A hemimethylated smart probe is used as the substrate for DNA MTase. Cleavage of the methylated product leads to separation of fluorophore from quencher, giving a proportional increase in fluorescence. The method permits real-time monitoring of DNA methylation process and makes it easy to characterize the activity of DNA MTase. It also has the potential to screen suitable inhibitor drugs for DNA MTase.

