Abstract:
:Previously, vibsanin B (ViB) was found to preferentially target HSP90β compared to HSP90α. In this study, multiple experiments, including pull-down assays of biotin-ViB with recombinant HSP90β-NTD, MD, CTD, and full-length HSP90β, molecular docking of ViB and its derivatives to the HSP90 CTD, and a inhibition assay of interaction of the HSP90β CTD with GST-tagged cyclophilin 40 (Cyp40) by ViB derivatives, suggest that ViB can directly bind to the HSP90 C-terminus. On the basis of the docking predictions and primary structure-activity relationships (SARs), a series of ViB analogues devised with focus on the C18 position, along with compounds derivatized at the C4, C7, and C8 positions, were designed and chemically synthesized. Compound 12f (IC50 = 1.12 μM against SK-BR-3) exhibits great potency with drug-like properties. Overall, our findings demonstrate that compounds with the vibsanin B scaffold are a new class of HSP90 C-terminal inhibitors with considerable potential as anticancer agents.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Shao LD,Su J,Ye B,Liu JX,Zuo ZL,Li Y,Wang YY,Xia C,Zhao QSdoi
10.1021/acs.jmedchem.7b01395subject
Has Abstractpub_date
2017-11-09 00:00:00pages
9053-9066issue
21eissn
0022-2623issn
1520-4804journal_volume
60pub_type
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