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Double Click Reaction for the Acquisition of a Highly Potent and Selective mPTPB Inhibitor

✍ Scribed by Dr. Rongjun He; Dr. Zhihong Yu; Dr. Yantao He; Dr. Li-Fan Zeng; Dr. Jie Xu; Li Wu; Andrea M. Gunawan; Lina Wang; Dr. Zhong-Xing Jiang; Prof. Dr. Zhong-Yin Zhang

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 449 KB
Volume: 5
Category: Article
ISSN: 1860-7179
DOI: 10.1002/cmdc.201000348

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✦ Synopsis

Abstract

Tuberculosis (TB), which is caused by Mycobacterium tuberculosis (Mtb), is a major worldwide threat to public health. Mycobacterium protein tyrosine phosphatase B (mPTPB) is a virulent phosphatase secreted by Mtb, which is essential for the survival and persistence of the bacterium in the host. Consequently, small‐molecule inhibitors of mPTPB are expected to serve as anti‐TB agents with a novel mode of action. Herein, we report the discovery of highly potent and selective mPTPB inhibitors using a novel, double Click chemistry strategy. The most potent mPTPB inhibitor from this approach possesses a K~i~ value of 160 nM and a >25‐fold selectivity for mPTPB over 19 other protein tyrosine phosphatases (PTBs). Molecular docking study of the enzyme–inhibitor complex provides a rationale for the high potency and selectivity of the lead compound and reveals an unusual binding mode, which may guide further optimization effort.

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