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-Structure paper
| タイトル | Molecular basis of lipid and ligand regulation of prostaglandin receptor DP2. |
|---|---|
| ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 121, Issue 51, Page e2403304121, Year 2024 |
| 掲載日 | 2024年12月17日 |
著者 | Jiuyin Xu / Youwei Xu / Li Hou / Xinheng He / Yang Li / Jing Zhao / Xue Meng / James Jiqi Wang / Yanli Wu / Heng Zhang / Yunhai Li / Wen Hu / Qingning Yuan / Kai Wu / Xi Cheng / Yi Jiang / Yu Xia / H Eric Xu / Canrong Wu / ![]() |
| PubMed 要旨 | Prostaglandin D2 receptor 2 (DP2) is an important anti-inflammatory and antiallergic drug target. While inactive DP2 structures are known, its activation mechanisms and biased signaling remain ...Prostaglandin D2 receptor 2 (DP2) is an important anti-inflammatory and antiallergic drug target. While inactive DP2 structures are known, its activation mechanisms and biased signaling remain unclear. Here, we report cryo-EM structures of an apo DP2-Gi complex, a DP2-Gi complex bound to the endogenous ligand Prostaglandin D (PGD), and a DP2-Gi complex bound to indomethacin, an arrestin-biased ligand, at resolutions of 2.5 Å, 2.8Å, and 2.3 Å, respectively. These structures reveal a distinct binding pose of PGD and indomethacin and provide key insights into receptor activation and transducer coupling. Combining the structural data with functional studies, we uncover the molecular basis for biased signaling of indomethacin toward β-arrestin over G proteins. Notably, a phospholipid binding site was identified at the DP2-G protein interface that modulates DP2-G protein interactions. Together, our functional and structural findings provide insights into DP2 activation, biased signaling, drug interactions, and lipid regulation, enabling rational design of safer antiallergy therapeutics targeting this key immune receptor. |
リンク | Proc Natl Acad Sci U S A / PubMed:39665758 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.33 - 2.82 Å |
| 構造データ | EMDB-38761, PDB-8xxu: EMDB-38762, PDB-8xxv: EMDB-60994, PDB-9iyb: |
| 化合物 | ![]() PDB-1d5q: ![]() ChemComp-IMN: ![]() ChemComp-HOH: ![]() ChemComp-PG2: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / GPCR / Prostaglandin / PTGDR2 / Indomethacin / DP2 / PGD2 |
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