7qhg
LIM domain kinase 2 (LIMK2) in complex with TH-470
Structural highlights
FunctionLIMK2_HUMAN Displays serine/threonine-specific phosphorylation of myelin basic protein and histone (MBP) in vitro.[1] [2] Publication Abstract from PubMedLIMKs are important regulators of actin and microtubule dynamics, and they play essential roles in many cellular processes. Deregulation of LIMKs has been linked to the development of diverse diseases, including cancers and cognitive disabilities, but well-characterized inhibitors known as chemical probes are still lacking. Here, we report the characterization of three highly selective LIMK1/2 inhibitors covering all canonical binding modes (type I/II/III) and the structure-based design of the type II/III inhibitors. Characterization of these chemical probes revealed a low nanomolar affinity for LIMK1/2, and all inhibitors 1 (LIMKi3; type I), 48 (TH470; type II), and 15 (TH257; type III) showed excellent selectivity in a comprehensive scanMAX kinase selectivity panel. Phosphoproteomics revealed remarkable differences between type I and type II inhibitors compared with the allosteric inhibitor 15. In phenotypic assays such as neurite outgrowth models of fragile X-chromosome, 15 showed promising activity, suggesting the potential application of allosteric LIMK inhibitors treating this orphan disease. Development and Characterization of Type I, Type II, and Type III LIM-Kinase Chemical Probes.,Hanke T, Mathea S, Woortman J, Salah E, Berger BT, Tumber A, Kashima R, Hata A, Kuster B, Muller S, Knapp S J Med Chem. 2022 Oct 13;65(19):13264-13287. doi: 10.1021/acs.jmedchem.2c01106. , Epub 2022 Sep 22. PMID:36136092[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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