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Updated: May 12, 2026

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons
Published on: August 6, 2012
Detection of base excision repair enzyme activity using a luminescent G-quadruplex selective switch-on probe
Ka-Ho Leung1, Hong-Zhang He, Victor Pui-Yan Ma
1Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
Abstract:
We report herein a simple and convenient luminescent assay for detection of base excision repair enzyme activity using an Ir(III) complex as a G-quadruplex selective probe. Using uracil-DNA glycosylase (UDG) as a model enzyme, the assay achieved high sensitivity and selectivity for UDG over other tested enzymes. The utility of the assay for screening potential UDG inhibitors was also demonstrated.
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