4gj2
From Proteopedia
Tyk2 (JH1) in complex with 2,6-dichloro-N-[2-({[(1R,2R)-2-fluorocyclopropyl]carbonyl}amino)pyridin-4-yl]benzamide
Structural highlights
Disease[TYK2_HUMAN] Mendelian susceptibility to mycobacterial diseases;Autosomal recessive hyper IgE syndrome. Defects in TYK2 are the cause of protein-tyrosine kinase 2 deficiency (TYK2 deficiency) [MIM:611521]; also known as autosomal recessive hyper-IgE syndrome (HIES) with atypical mycobacteriosis. TYK2 deficiency consists of a primary immunodeficiency characterized by recurrent skin abscesses, pneumonia, and highly elevated serum IgE. Function[TYK2_HUMAN] Probably involved in intracellular signal transduction by being involved in the initiation of type I IFN signaling. Phosphorylates the interferon-alpha/beta receptor alpha chain.[1] Publication Abstract from PubMedHerein we report our lead optimization effort to identify potent, selective, and orally bioavailable TYK2 inhibitors, starting with lead molecule 3. We used structure-based design to discover 2,6-dichloro-4-cyanophenyl and (1R,2R)-2-fluorocyclopropylamide modifications, each of which exhibited improved TYK2 potency and JAK1 and JAK2 selectivity relative to 3. Further optimization eventually led to compound 37 that showed good TYK2 enzyme and interleukin-12 (IL-12) cell potency, as well as acceptable cellular JAK1 and JAK2 selectivity and excellent oral exposure in mice. When tested in a mouse IL-12 PK/PD model, compound 37 showed statistically significant knockdown of cytokine interferon-gamma (IFNgamma), suggesting that selective inhibition of TYK2 kinase activity might be sufficient to block the IL-12 pathway in vivo. Lead Optimization of a 4-Aminopyridine Benzamide Scaffold To Identify Potent, Selective, and Orally Bioavailable TYK2 Inhibitors.,Liang J, van Abbema A, Balazs M, Barrett K, Berezhkovsky L, Blair W, Chang C, Delarosa D, Devoss J, Driscoll J, Eigenbrot C, Ghilardi N, Gibbons P, Halladay J, Johnson A, Kohli PB, Lai Y, Liu Y, Lyssikatos J, Mantik P, Menghrajani K, Murray J, Peng I, Sambrone A, Shia S, Shin Y, Smith J, Sohn S, Tsui V, Ultsch M, Wu LC, Xiao Y, Yang W, Young J, Zhang B, Zhu BY, Magnuson S J Med Chem. 2013 Jun 13;56(11):4521-36. doi: 10.1021/jm400266t. Epub 2013 May 29. PMID:23668484[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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