5jga
Crystal structure of human TAK1/TAB1 fusion protein in complex with ligand 11c
Structural highlights
FunctionTAB1_HUMAN May be an important signaling intermediate between TGFB receptors and MAP3K7/TAK1. May play an important role in mammalian embryogenesis.[1] M3K7_HUMAN Serine/threonine kinase which acts as an essential component of the MAP kinase signal transduction pathway. Plays an important role in the cascades of cellular responses evoked by changes in the environment. Mediates signal transduction of TRAF6, various cytokines including interleukin-1 (IL-1), transforming growth factor-beta (TGFB), TGFB-related factors like BMP2 and BMP4, toll-like receptors (TLR), tumor necrosis factor receptor CD40 and B-cell receptor (BCR). Ceramides are also able to activate MAP3K7/TAK1. Once activated, acts as an upstream activator of the MKK/JNK signal transduction cascade and the p38 MAPK signal transduction cascade through the phosphorylation and activation of several MAP kinase kinases like MAP2K1/MEK1, MAP2K3/MKK3, MAP2K6/MKK6 and MAP2K7/MKK7. These MAP2Ks in turn activate p38 MAPKs, c-jun N-terminal kinases (JNKs) and I-kappa-B kinase complex (IKK). Both p38 MAPK and JNK pathways control the transcription factors activator protein-1 (AP-1), while nuclear factor-kappa B is activated by IKK. MAP3K7 activates also IKBKB and MAPK8/JNK1 in response to TRAF6 signaling and mediates BMP2-induced apoptosis. In osmotic stress signaling, plays a major role in the activation of MAPK8/JNK1, but not that of NF-kappa-B. Promotes TRIM5 capsid-specific restriction activity.[2] [3] [4] [5] [6] [7] [8] [9] Publication Abstract from PubMedA novel thienopyrimidinone analog was discovered as a potent and highly selective TAK1 inhibitor using the SBDD approach. TAK1 plays a key role in inflammatory and immune signaling, so TAK1 is considered to be an attractive molecular target for the treatment of human diseases (inflammatory disease, cancer, etc.). After the hit compound had been obtained, our modifications successfully increased TAK1 inhibitory activity and solubility, but metabolic stability was still unsatisfactory. To improve metabolic stability, we conducted metabolic identification. Although the obtained metabolite was fortunately a potent TAK1 inhibitor, its kinase selectivity was low. Subsequently, to achieve high kinase selectivity, we used SBDD to follow two strategies: one targeting unique amino acid residues in TAK1, especially the combination of Ser111 and Asn114; the other decreasing the interaction with Tyr106 at the hinge position in TAK1. As expected, our designed compound showed an excellent kinase selectivity profile in both an in-house and a commercially available panel assay of over 420 kinases and also retained its potent TAK1 inhibitory activity (TAK1 IC50=11nM). Discovery of a potent and highly selective transforming growth factor beta receptor-associated kinase 1 (TAK1) inhibitor by structure based drug design (SBDD).,Muraoka T, Ide M, Morikami K, Irie M, Nakamura M, Miura T, Kamikawa T, Nishihara M, Kashiwagi H Bioorg Med Chem. 2016 Sep 15;24(18):4206-17. doi: 10.1016/j.bmc.2016.07.006. Epub, 2016 Jul 6. PMID:27448772[10] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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