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Discovery of potent PTP1B inhibitors via structure-based drug design, synthesis and in vitro bioassay of Norathyriol derivatives.

Abstract：

:Protein tyrosine phosphatase 1B (PTP1B) has recently been identified as a potential target of Norathyriol. Unfortunately, Norathyriol is not a potent PTP1B inhibitor, which somewhat hinders its further application. Based on the fact that no study on the relationship of chemical structure and PTP1B inhibitory activity of Norathyriol has been reported so far, we attempted to perform structural optimization so as to improve the potency for PTP1B. Via structure-based drug design (SBDD), a rational strategy based on the binding mode of Norathyriol to PTP1B, we designed 26 derivatives with substitutions at the four phenolic hydroxyl groups of Norathyriol. By chemical synthesis and in vitro bioassay, we identified seven PTP1B inhibitors that were more potent than Norathyriol, of which XWJ24 showed the highest potency (IC50: 0.6 μM). We also found out that XWJ24 was a competitive inhibitor and showed the 4.5-fold selectivity over its close homolog, TC-PTP. Through molecular docking of XWJ24 against PTP1B, we highlighted the essential role of its hydrogen bond with Asp181 for PTP1B inhibition and identified a potential halogen bond with Asp48 that was not observed for Norathyriol. The current data indicate that our SBDD strategy is effective to discover potent PTP1B-targeted Norathyriol derivatives, and XWJ24 is a promising lead compound for further development.

journal_name

Bioorg Chem

journal_title

Bioorganic chemistry

authors

Xue W,Tian J,Wang XS,Xia J,Wu S

doi

10.1016/j.bioorg.2019.01.059

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

224-234

eissn

0045-2068

issn

1090-2120

pii

S0045-2068(18)31070-8

journal_volume

86

pub_type

杂志文章

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