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Updated: Feb 6, 2026

Purification of Ubiquitinated p53 Proteins from Mammalian Cells
Published on: March 21, 2022
Environment-sensitive turn-on fluorescent probes for p53-MDM2 protein-protein interaction
Tingting Liu1, Yan Jiang2, Zhenzhen Liu1
1Department of Medicinal Chemistry , Key Laboratory of Chemical Biology (MOE) , School of Pharmacy , Shandong University , Jinan , Shandong 250012 , China .
Abstract:
A series of probes with a turn-on switch for the p53-MDM2 protein-protein interaction were developed. After careful evaluation, these small molecule fluorescent probes exhibited high practical activity and selectivity in vitro and in cellulo. In particular probe 10, which had a Ki value of 0.03 μM, displayed much better binding affinity compared to the positive control Nutlin-3, which had a Ki value of 0.23 μM. These no-wash environment-sensitive turn-on fluorescent probes have been successfully applied to imaging p53-MDM2 interaction in the human lung cancer cell line A549 (wild-type p53) at the micromolar level. Therefore, these fluorescent probes are expected to be used in drug screening and cell staining in p53-MDM2 fields, as well as in pathological and physiological studies of the p53-MDM2 interaction.
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