120983-26-8Relevant academic research and scientific papers
Synthesis and biological evaluation of naphthoquinone analogs as a novel class of proteasome inhibitors
Lawrence, Harshani R.,Kazi, Aslamuzzaman,Luo, Yunting,Kendig, Robert,Ge, Yiyu,Jain, Sanjula,Daniel, Kenyon,Santiago, Daniel,Guida, Wayne C.,Sebti, Said M.
experimental part, p. 5576 - 5592 (2010/09/15)
Screening of the NCI Diversity Set-1 identified PI-083 (NSC-45382) a proteasome inhibitor selective for cancer over normal cells. Focused libraries of novel compounds based on PI-083 chloronaphthoquinone and sulfonamide moieties were synthesized to gain a better understanding of the structure-activity relationship responsible for chymotrypsin-like proteasome inhibitory activity. This led to the demonstration that the chloronaphthoquinone and the sulfonamide moieties are critical for inhibitory activity. The pyridyl group in PI-083 can be replaced with other heterocyclic groups without significant loss of activity. Molecular modeling studies were also performed to explore the detailed interactions of PI-083 and its derivatives with the β5 and β6 subunits of the 20S proteasome. The refined model showed an H-bond interaction between the Asp-114 and the sulfonamide moiety of the PI-083 in the β6 subunit.
