High-Throughput Discovery of <i>Mycobacterium tuberculosis</i> Protein Tyrosine Phosphatase B (MptpB) Inhibitors Using Click Chemistry
作者:Lay Pheng Tan、Hao Wu、Peng-Yu Yang、Karunakaran A. Kalesh、Xiaohua Zhang、Mingyu Hu、Rajavel Srinivasan、Shao Q. Yao
DOI:10.1021/ol9023419
日期:2009.11.19
A ∼3500-member library of bidentate inhibitors against protein tyrosine phosphatases (PTPs) was rapidly assembled using click chemistry. Subsequent high-throughput screening had led to the discovery of highlypotent (Ki as low as 150 nM) and selectiveMptpBinhibitors, some of which represent the most potentMptpBinhibitors developed to date.
Inhibition of Lymphoid Tyrosine Phosphatase by Benzofuran Salicylic Acids
作者:Torkel Vang、Yuli Xie、Wallace H. Liu、Dušica Vidović、Yidong Liu、Shuangding Wu、Deborah H. Smith、Alison Rinderspacher、Caty Chung、Gangli Gong、Tomas Mustelin、Donald W. Landry、Robert C. Rickert、Stephan C. Schürer、Shi-Xian Deng、Lutz Tautz
DOI:10.1021/jm101004d
日期:2011.1.27
The lymphoid tyrosine phosphatase (Lyp, PTPN22) is a critical negative regulator of T cell antigen receptor (TCR) signaling. A single-nucleotide polymorphism (SNP) in the ptpn22 gene correlates with the incidence of various autoimmune diseases, including type I diabetes, rheumatoid arthritis, and systemic lupus erythematosus. Since the disease-associated allele is a more potent inhibitor of TCR signaling, specific Lyp inhibitors May become valuable in treating autoimmunity. Using a structure-based approach, we synthesized a library of 34 compounds that inhibited Lyp with IC50 values between 0.27 and 6.2 mu M. A reporter assay was employed to screen for compounds that enhanced TCR signaling in cells, and several inhibitors displayed a dose-dependent, activating effect. Subsequent probing for Lyp's direct physiological targets by immunoblot analysis confirmed the ability of the compounds to inhibit Lyp in T cells. Selectivity profiling against closely related tyrosine phosphatases and in silico docking studies with the crystal structure of Lyp yielded valuable information for the design of Lyp-specific compounds.