Inhibition of Low Molecular Weight Protein Tyrosine Phosphatase by an Induced-Fit Mechanism

Rongjun He, Jifeng Wang, Zhi Hong Yu, Ruo Yu Zhang, David S Liu, Li Wu, Zhong Yin Zhang

Research output: Contribution to journalArticle

7 Scopus citations


The low molecular weight protein tyrosine phosphatase (LMW-PTP) is a regulator of a number of signaling pathways and has been implicated as a potential target for oncology and diabetes/obesity. There is significant therapeutic interest in developing potent and selective inhibitors to control LMW-PTP activity. We report the discovery of a novel class of LMW-PTP inhibitors derived from sulfophenyl acetic amide (SPAA), some of which exhibit greater than 50-fold preference for LMW-PTP over a large panel of PTPs. X-ray crystallography reveals that binding of SPAA-based inhibitors induces a striking conformational change in the LMW-PTP active site, leading to the formation of a previously undisclosed hydrophobic pocket to accommodate the α-phenyl ring in the ligand. This induced-fit mechanism is likely a major contributor responsible for the exquisite inhibitor selectivity.

Original languageEnglish (US)
Pages (from-to)9094-9106
Number of pages13
JournalJournal of Medicinal Chemistry
Issue number19
StatePublished - Oct 13 2016
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery

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