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-Structure paper
| タイトル | Structure-guided discovery of bile acid derivatives for treating liver diseases without causing itch. |
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| ジャーナル・号・ページ | Cell, Vol. 187, Issue 25, Page 7164-7182.e18, Year 2024 |
| 掲載日 | 2024年12月12日 |
著者 | Jun Yang / Tianjun Zhao / Junping Fan / Huaibin Zou / Guangyi Lan / Fusheng Guo / Yaocheng Shi / Han Ke / Huasheng Yu / Zongwei Yue / Xin Wang / Yingjie Bai / Shuai Li / Yingjun Liu / Xiaoming Wang / Yu Chen / Yulong Li / Xiaoguang Lei / ![]() |
| PubMed 要旨 | Chronic itch is a debilitating symptom profoundly impacting the quality of life in patients with liver diseases like cholestasis. Activation of the human G-protein coupled receptor, MRGPRX4 (hX4), by ...Chronic itch is a debilitating symptom profoundly impacting the quality of life in patients with liver diseases like cholestasis. Activation of the human G-protein coupled receptor, MRGPRX4 (hX4), by bile acids (BAs) is implicated in promoting cholestasis itch. However, the detailed underlying mechanisms remain elusive. Here, we identified 3-sulfated BAs that are elevated in cholestatic patients with itch symptoms. We solved the cryo-EM structure of hX4-Gq in a complex with 3-phosphated deoxycholic acid (DCA-3P), a mimic of the endogenous 3-sulfated deoxycholic acid (DCA-3S). This structure revealed an unprecedented ligand-binding pocket in MRGPR family proteins, highlighting the crucial role of the 3-hydroxyl (3-OH) group on BAs in activating hX4. Guided by this structural information, we designed and developed compound 7 (C7), a BA derivative lacking the 3-OH. Notably, C7 effectively alleviates hepatic injury and fibrosis in liver disease models while significantly mitigating the itch side effects. |
リンク | Cell / PubMed:39476841 |
| 手法 | EM (単粒子) |
| 解像度 | 2.9 - 3.2 Å |
| 構造データ | EMDB-36890, PDB-8k4s: EMDB-37191, PDB-8kex: |
| 化合物 | ![]()
ChemComp-JW0: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / MRGPRX4 / Bile acid / Cholestatic itch / GPCR / Agonist |
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