Bioorganic and Medicinal Chemistry Letters p. 1958 - 1962 (2016)
Update date:2022-08-04
Topics:
Shi, Jingmiao
Lei, Meng
Wu, Wenkui
Feng, Huayun
Wang, Jia
Chen, Shanshan
Zhu, Yongqiang
Hu, Shihe
Liu, Zhaogang
Jiang, Cheng
A series of novel dipeptidyl boronic acid proteasome inhibitors constructed from αα- and αβ-amino acids were designed and synthesized. Their structures were elucidated by 1H NMR, 13C NMR, LC-MS and HRMS. These compounds were evaluated for their β5 subunit inhibitory activities of human proteasome. The results showed that dipeptidyl boronic acid inhibitors composed of αα-amino acids were as active as bortezomib. Interestingly, the activities of those derived from αβ-amino acids lost completely. Of all the inhibitors, compound 22 (IC50 = 4.82 nM) was the most potent for the inhibition of proteasome activity. Compound 22 was also the most active against three MM cell lines with IC50 values less than 5 nM in inhibiting cell growth assays. Molecular docking studies displayed that 22 fitted very well in the β5 subunit active pocket of proteasome.
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