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-Structure paper
タイトル | Organizing structural principles of the IL-17 ligand-receptor axis. |
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ジャーナル・号・ページ | Nature, Vol. 609, Issue 7927, Page 622-629, Year 2022 |
掲載日 | 2022年7月21日 |
著者 | Steven C Wilson / Nathanael A Caveney / Michelle Yen / Christoph Pollmann / Xinyu Xiang / Kevin M Jude / Maximillian Hafer / Naotaka Tsutsumi / Jacob Piehler / K Christopher Garcia / |
PubMed 要旨 | The IL-17 family of cytokines and receptors have central roles in host defence against infection and development of inflammatory diseases. The compositions and structures of functional IL-17 family ...The IL-17 family of cytokines and receptors have central roles in host defence against infection and development of inflammatory diseases. The compositions and structures of functional IL-17 family ligand-receptor signalling assemblies remain unclear. IL-17E (also known as IL-25) is a key regulator of type 2 immune responses and driver of inflammatory diseases, such as allergic asthma, and requires both IL-17 receptor A (IL-17RA) and IL-17RB to elicit functional responses. Here we studied IL-25-IL-17RB binary and IL-25-IL-17RB-IL-17RA ternary complexes using a combination of cryo-electron microscopy, single-molecule imaging and cell-based signalling approaches. The IL-25-IL-17RB-IL-17RA ternary signalling assembly is a C2-symmetric complex in which the IL-25-IL-17RB homodimer is flanked by two 'wing-like' IL-17RA co-receptors through a 'tip-to-tip' geometry that is the key receptor-receptor interaction required for initiation of signal transduction. IL-25 interacts solely with IL-17RB to allosterically promote the formation of the IL-17RB-IL-17RA tip-to-tip interface. The resulting large separation between the receptors at the membrane-proximal level may reflect proximity constraints imposed by the intracellular domains for signalling. Cryo-electron microscopy structures of IL-17A-IL-17RA and IL-17A-IL-17RA-IL-17RC complexes reveal that this tip-to-tip architecture is a key organizing principle of the IL-17 receptor family. Furthermore, these studies reveal dual actions for IL-17RA sharing among IL-17 cytokine complexes, by either directly engaging IL-17 cytokines or alternatively functioning as a co-receptor. |
リンク | Nature / PubMed:35863378 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.5 - 4.4 Å |
構造データ | EMDB-26833, PDB-7uwj: EMDB-26834, PDB-7uwk: EMDB-26835, PDB-7uwl: EMDB-26836, PDB-7uwm: EMDB-26837, PDB-7uwn: |
化合物 | ChemComp-NAG: |
由来 |
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キーワード | CYTOKINE / Receptor complex / IL-17E / IL-25 / IL-17RB / IL-17RA / IL-17A / IL-17RC |