Scientific reports 2015-01-01

A novel 2,5-diaminopyrimidine-based affinity probe for Bruton's tyrosine kinase.

Yingying Zuo, Yanxia Shi, Xitao Li, Yingqi Teng, Zhengying Pan

Index: Sci. Rep. 5 , 16136, (2015)

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Abstract

As a critical regulator of the B-cell receptor signaling pathway, Bruton's tyrosine kinase (Btk) has attracted intensive drug discovery efforts for treating B-cell lineage cancers and autoimmune disorders. In particular, covalent inhibitors targeting Cys481 in Btk have demonstrated impressive clinical benefits, and their companion affinity probes have been crucial in the drug development process. Recently, we have discovered a novel series of 2,5-diaminopyrimidine-based covalent irreversible inhibitors of Btk. Here, we present the discovery of a novel affinity Btk probe based on the aforementioned scaffold and demonstrate its usage in evaluating the target engagement of Btk inhibitors in live cells.

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