| 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 PubMed
Tyrosine kinase 2 (TYK2) is a nonreceptor tyrosine kinase that belongs to the JAK family also comprising JAK1, JAK2, and JAK3. TYK2 is an attractive target for various autoimmune diseases as it regulates signal transduction downstream of IL-23 and IL-12 receptors. Selective TYK2 inhibition offers a differentiated clinical profile compared to currently approved JAK inhibitors. However, selectivity for TYK2 versus other JAK family members has been difficult to achieve with small molecules that inhibit the catalytically active kinase domain. Successful targeting of the TYK2 pseudokinase domain as a strategy to achieve isoform selectivity was recently exemplified with deucravacitinib. Described herein is the optimization of selective TYK2 inhibitors targeting the pseudokinase domain, resulting in the discovery of the clinical candidate ABBV-712 (21).
Targeting the Tyrosine Kinase 2 (TYK2) Pseudokinase Domain: Discovery of the Selective TYK2 Inhibitor ABBV-712.,Breinlinger E, Van Epps S, Friedman M, Argiriadi M, Chien E, Chhor G, Cowart M, Dunstan T, Graff C, Hardee D, Herold JM, Little A, McCarthy R, Parmentier J, Perham M, Qiu W, Schrimpf M, Vargo T, Webster MP, Wu F, Bennett D, Edmunds J J Med Chem. 2023 Oct 26;66(20):14335-14356. doi: 10.1021/acs.jmedchem.3c01373. , Epub 2023 Oct 12. PMID:37823891[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Colamonici O, Yan H, Domanski P, Handa R, Smalley D, Mullersman J, Witte M, Krishnan K, Krolewski J. Direct binding to and tyrosine phosphorylation of the alpha subunit of the type I interferon receptor by p135tyk2 tyrosine kinase. Mol Cell Biol. 1994 Dec;14(12):8133-42. PMID:7526154
- ↑ Breinlinger E, Van Epps S, Friedman M, Argiriadi M, Chien E, Chhor G, Cowart M, Dunstan T, Graff C, Hardee D, Herold JM, Little A, McCarthy R, Parmentier J, Perham M, Qiu W, Schrimpf M, Vargo T, Webster MP, Wu F, Bennett D, Edmunds J. Targeting the Tyrosine Kinase 2 (TYK2) Pseudokinase Domain: Discovery of the Selective TYK2 Inhibitor ABBV-712. J Med Chem. 2023 Oct 26;66(20):14335-14356. PMID:37823891 doi:10.1021/acs.jmedchem.3c01373
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