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Title | Structures of complete extracellular receptor assemblies mediated by IL-12 and IL-23. |
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Journal, issue, pages | Nat Struct Mol Biol, Vol. 31, Issue 4, Page 591-597, Year 2024 |
Publish date | Jan 29, 2024 |
Authors | Yehudi Bloch / Jan Felix / Romain Merceron / Mathias Provost / Royan Alipour Symakani / Robin De Backer / Elisabeth Lambert / Ahmad R Mehdipour / Savvas N Savvides / |
PubMed Abstract | Cell-surface receptor complexes mediated by pro-inflammatory interleukin (IL)-12 and IL-23, both validated therapeutic targets, are incompletely understood due to the lack of structural insights into ...Cell-surface receptor complexes mediated by pro-inflammatory interleukin (IL)-12 and IL-23, both validated therapeutic targets, are incompletely understood due to the lack of structural insights into their complete extracellular assemblies. Furthermore, there is a paucity of structural details describing the IL-12-receptor interaction interfaces, in contrast to IL-23-receptor complexes. Here we report structures of fully assembled mouse IL-12/human IL-23-receptor complexes comprising the complete extracellular segments of the cognate receptors determined by electron cryo-microscopy. The structures reveal key commonalities but also surprisingly diverse features. Most notably, whereas IL-12 and IL-23 both utilize a conspicuously presented aromatic residue on their α-subunit as a hotspot to interact with the N-terminal Ig domain of their high-affinity receptors, only IL-12 juxtaposes receptor domains proximal to the cell membrane. Collectively, our findings will help to complete our understanding of cytokine-mediated assemblies of tall cytokine receptors and will enable a cytokine-specific interrogation of IL-12/IL-23 signaling in physiology and disease. |
External links | Nat Struct Mol Biol / PubMed:38287195 |
Methods | EM (single particle) / X-ray diffraction |
Resolution | 2 - 6.7 Å |
Structure data | EMDB-16820, PDB-8odz: EMDB-16821, PDB-8oe0: EMDB-16822: Cryo-EM structure of the murine IL-12 complete extracellular signaling complex (Class 1). EMDB-16823: Cryo-EM structure of the murine IL-12 complete extracellular signaling complex (Class 2). EMDB-16824, PDB-8oe4: EMDB-17580, PDB-8pb1: PDB-8c7m: PDB-8cr5: PDB-8cr6: PDB-8cr8: PDB-8odx: PDB-8ppm: |
Chemicals | ChemComp-NAG: ChemComp-CL: ChemComp-HOH: ChemComp-TB: ChemComp-K: |
Source |
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Keywords | CYTOKINE / receptor / antagonist / antibody / complex / inflammation / glycoprotein / immunity / heterodimer / EXTRACELLULAR / FIBRONECTIN TYPE III / fibronectin / SIGNALING PROTEIN / IMMUNOSUPPRESSANT / Fab fragment / designed crystal contact |