3jvf | pdb_00003jvf
Crystal structure of an Interleukin-17 receptor complex
Structural highlights
Disease[IL17F_HUMAN] Defects in IL17F are the cause of familial candidiasis type 6 (CANDF6) [MIM:613956]. CANDF6 is a rare disorder with altered immune responses and impaired clearance of fungal infections, selective against Candida. It is characterized by persistent and/or recurrent infections of the skin, nails and mucous membranes caused by organisms of the genus Candida, mainly Candida albicans.[1] [I17RA_HUMAN] Defects in IL17RA are the cause of familial candidiasis type 5 (CANDF5) [MIM:613953]. CANDF5 is a rare disorder with altered immune responses and impaired clearance of fungal infections, selective against Candida. It is characterized by persistent and/or recurrent infections of the skin, nails and mucous membranes caused by organisms of the genus Candida, mainly Candida albicans.[2] Function[IL17F_HUMAN] Stimulates the production of other cytokines such as IL-6, IL-8 and granulocyte colony-stimulating factor, and can regulate cartilage matrix turnover. Stimulates PBMC and T-cell proliferation. Inhibits angiogenesis. [I17RA_HUMAN] Receptor for IL17A, IL17F and, in dimer with IL17RE, for IL17C. Binds its IL17A ligand with low affinity, suggesting that additional components are involved in IL17A-induced signaling.[3] [4] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedInterleukin 17 (IL-17)-producing helper T cells (T(H)-17 cells), together with their effector cytokines, including members of the IL-17 family, are emerging as key mediators of chronic inflammatory and autoimmune disorders. Here we present the crystal structure of a complex of IL-17 receptor A (IL-17RA) bound to IL-17F in a 1:2 stoichiometry. The mechanism of complex formation was unique for cytokines and involved the engagement of IL-17 by two fibronectin-type domains of IL-17RA in a groove between the IL-17 homodimer interface. Binding of the first receptor to the IL-17 cytokines modulated the affinity and specificity of the second receptor-binding event, thereby promoting heterodimeric versus homodimeric complex formation. IL-17RA used a common recognition strategy to bind to several members of the IL-17 family, which allows it to potentially act as a shared receptor in multiple different signaling complexes. Structural basis of receptor sharing by interleukin 17 cytokines.,Ely LK, Fischer S, Garcia KC Nat Immunol. 2009 Dec;10(12):1245-51. Epub 2009 Oct 18. PMID:19838198[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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