| Structural highlights
Function
[M4K4_HUMAN] Serine/threonine kinase that may play a role in the response to environmental stress and cytokines such as TNF-alpha. Appears to act upstream of the JUN N-terminal pathway. Phosphorylates SMAD1 on Thr-322.[1] [2]
Publication Abstract from PubMed
Progressive loss and impaired restoration of neuronal activity are hallmarks of neurological diseases, and new small molecules with neurotrophic activity are in high demand. The militarinone alkaloids and structurally simplified analogues with 4-hydroxy-2-pyridone core structure induce pronounced neurite outgrowth, but their protein target has not been identified. Reported herein is the synthesis of a militarinone-inspired 4-hydroxy-2-pyridone collection, its investigation for enhancement of neurite outgrowth, and the discovery of the stress pathway kinase MAP4K4 as a target of the discovered neuritogenic pyridones. The most potent 4-hydroxy-2-pyridone is a selective ATP-competitive inhibitor of MAP4K4 but not of the other stress pathway related kinases, as proven by biochemical analysis and by a crystal structure of the inhibitor in complex with MAP4K4. The findings support the notion that MAP4K4 may be a new target for the treatment of neurodegenerative diseases.
Neuritogenic Militarinone-Inspired 4-Hydroxypyridones Target the Stress Pathway Kinase MAP4K4.,Schroder P, Forster T, Kleine S, Becker C, Richters A, Ziegler S, Rauh D, Kumar K, Waldmann H Angew Chem Int Ed Engl. 2015 Apr 23. doi: 10.1002/anie.201501515. PMID:25908259[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Yao Z, Zhou G, Wang XS, Brown A, Diener K, Gan H, Tan TH. A novel human STE20-related protein kinase, HGK, that specifically activates the c-Jun N-terminal kinase signaling pathway. J Biol Chem. 1999 Jan 22;274(4):2118-25. PMID:9890973
- ↑ Kaneko S, Chen X, Lu P, Yao X, Wright TG, Rajurkar M, Kariya K, Mao J, Ip YT, Xu L. Smad inhibition by the Ste20 kinase Misshapen. Proc Natl Acad Sci U S A. 2011 Jul 5;108(27):11127-32. doi:, 10.1073/pnas.1104128108. Epub 2011 Jun 20. PMID:21690388 doi:http://dx.doi.org/10.1073/pnas.1104128108
- ↑ Schroder P, Forster T, Kleine S, Becker C, Richters A, Ziegler S, Rauh D, Kumar K, Waldmann H. Neuritogenic Militarinone-Inspired 4-Hydroxypyridones Target the Stress Pathway Kinase MAP4K4. Angew Chem Int Ed Engl. 2015 Apr 23. doi: 10.1002/anie.201501515. PMID:25908259 doi:http://dx.doi.org/10.1002/anie.201501515
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