Liying Zhang, Jizhe Dong, Yingxia Zhang, Jun Liu, Luyong Zhang and Hongbin Sun Pages 294 - 302 ( 9 )
To study the target proteins of oleanolic acid, a series of novel photoaffinity probes were designed and synthesized. Their affinity for the target proteins was evaluated in an enzyme inhibition assay against glycogen phosphorylase, a known target protein of oleanolic acid. Among these compounds, probe 2 exhibited the most potent activity with an IC50 value of 5.98 μM, which was about 2.5-fold more potent than its parent compound oleanolic acid. The results showed that the synthesized photoaffinity probes retained the binding affinity for their target proteins, and might be used as powerful tools to fish out the target proteins of oleanolic acid.
Binding affinity, Glycogen phosphorylase, Oleanolic acid, Photoaffinity probes, Target proteins
State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, People’s Republic of China.