8OE4

Cryo-EM structure of a pre-dimerized human IL-23 complete extracellular signaling complex.

8OE4 の概要

• エントリーDOI: 10.2210/pdb8oe4/pdb
• 関連するPDBエントリー: 8c7m 8cr5 8cr6 8cr8 8odx 8odz 8oe0
• EMDBエントリー: 16820 16821 16822 16823 16824
• 分子名称: Interleukin-12 subunit beta, Interleukin-23 subunit alpha, Interleukin-23 receptor,Calmodulin-1, ... (7 entities in total)
• 機能のキーワード: complex, cytokine, receptor, signaling protein
• 由来する生物種: Homo sapiens (human); 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 172185.25

構造登録者

Bloch, Y.,Felix, J.,Savvides, S.N. (登録日: 2023-03-10, 公開日: 2024-02-07, 最終更新日: 2024-11-20)

主引用文献

Bloch, Y.,Felix, J.,Merceron, R.,Provost, M.,Symakani, R.A.,De Backer, R.,Lambert, E.,Mehdipour, A.R.,Savvides, S.N.
Structures of complete extracellular receptor assemblies mediated by IL-12 and IL-23.
Nat.Struct.Mol.Biol., 31:591-597, 2024

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 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.

PubMed: 38287195
DOI: 10.1038/s41594-023-01190-6

実験手法

ELECTRON MICROSCOPY (3.6 Å)