| Structural highlights
Function
[RIPK1_HUMAN] Serine-threonine kinase which transduces inflammatory and cell-death signals (programmed necrosis) following death receptors ligation, activation of pathogen recognition receptors (PRRs), and DNA damage. Upon activation of TNFR1 by the TNF-alpha family cytokines, TRADD and TRAF2 are recruited to the receptor. Ubiquitination by TRAF2 via 'Lys-63'-link chains acts as a critical enhancer of communication with downstream signal transducers in the mitogen-activated protein kinase pathway and the NF-kappa-B pathway, which in turn mediate downstream events including the activation of genes encoding inflammatory molecules. Polyubiquitinated protein binds to IKBKG/NEMO, the regulatory subunit of the IKK complex, a critical event for NF-kappa-B activation. Interaction with other cellular RHIM-containing adapters initiates gene activation and cell death. RIPK1 and RIPK3 association, in particular, forms a necrosis-inducing complex.[1] [2] [3]
Publication Abstract from PubMed
Receptor-interacting protein kinase 1 (RIPK1), a key component of the cellular necroptosis pathway, has gained recognition as an important therapeutic target. Pharmacologic inhibition or genetic inactivation of RIPK1 has shown promise in animal models of disease ranging from acute ischemic conditions, chronic inflammation, and neurodegeneration. We present here a class of RIPK1 inhibitors that is distinguished by a lack of a lipophilic aromatic group present in most literature inhibitors that typically occupies a hydrophobic back pocket of the protein active site. Despite not having this ubiquitous feature of many known RIPK1 inhibitors, we were able to obtain compounds with good potency, kinase selectivity, and pharmacokinetic properties in rats. The use of the lipophilic yet metabolically stable pentafluoroethyl group was critical to balancing the potency and properties of optimized analogs.
Potent and selective inhibitors of receptor-interacting protein kinase 1 that lack an aromatic back pocket group.,Hamilton GL, Chen H, Deshmukh G, Eigenbrot C, Fong R, Johnson A, Kohli PB, Lupardus PJ, Liederer BM, Ramaswamy S, Wang H, Wang J, Xu Z, Zhu Y, Vucic D, Patel S Bioorg Med Chem Lett. 2019 Apr 11. pii: S0960-894X(19)30223-9. doi:, 10.1016/j.bmcl.2019.04.014. PMID:31000154[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Holler N, Zaru R, Micheau O, Thome M, Attinger A, Valitutti S, Bodmer JL, Schneider P, Seed B, Tschopp J. Fas triggers an alternative, caspase-8-independent cell death pathway using the kinase RIP as effector molecule. Nat Immunol. 2000 Dec;1(6):489-95. PMID:11101870 doi:10.1038/82732
- ↑ Cho YS, Challa S, Moquin D, Genga R, Ray TD, Guildford M, Chan FK. Phosphorylation-driven assembly of the RIP1-RIP3 complex regulates programmed necrosis and virus-induced inflammation. Cell. 2009 Jun 12;137(6):1112-23. doi: 10.1016/j.cell.2009.05.037. PMID:19524513 doi:10.1016/j.cell.2009.05.037
- ↑ He S, Wang L, Miao L, Wang T, Du F, Zhao L, Wang X. Receptor interacting protein kinase-3 determines cellular necrotic response to TNF-alpha. Cell. 2009 Jun 12;137(6):1100-11. doi: 10.1016/j.cell.2009.05.021. PMID:19524512 doi:10.1016/j.cell.2009.05.021
- ↑ Hamilton GL, Chen H, Deshmukh G, Eigenbrot C, Fong R, Johnson A, Kohli PB, Lupardus PJ, Liederer BM, Ramaswamy S, Wang H, Wang J, Xu Z, Zhu Y, Vucic D, Patel S. Potent and selective inhibitors of receptor-interacting protein kinase 1 that lack an aromatic back pocket group. Bioorg Med Chem Lett. 2019 Apr 11. pii: S0960-894X(19)30223-9. doi:, 10.1016/j.bmcl.2019.04.014. PMID:31000154 doi:http://dx.doi.org/10.1016/j.bmcl.2019.04.014
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