对GPR15的连接体识别和受体激活的分子见解
Shutian Chen1,2, Xuteng Han1,2, Yuxia Zhang1,2
1State Key Laboratory of Drug Research, State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
iScience
|December 1, 2025
概括
研究人员阐明了与其连接体GPR15L结合的G蛋白结合受体15 (GPR15) 的结构. 这揭示了免疫细胞贩运和炎症疾病潜在治疗点的关键相互作用.
科学领域:
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
背景情况:
- G蛋白结合受体15 (GPR15) 调解免疫细胞贩运,并与炎症性疾病有关.
- 了解GPR15-GPR15L相互作用的分子基础对于其生理和病理作用至关重要.
研究的目的:
- 确定GPR15的分子结构与其全长联体GPR15L及其G蛋白复合.
- 确定控制连接体识别,选择性和受体激活的关键相互作用.
- 探索针对炎症状况的针对 GPR15 的潜在治疗策略.
主要方法:
- 进行X射线晶体学以确定GPR15-GPR15L-Gi3复合结构.
- 位点定向突变发生,以验证关键相互作用位点.
- 分子动力学模拟以调查连接体结合动力学和N端硫化作用.
- 分子对接以选潜在的小分子对手.
主要成果:
- 该研究报告了GPR15与全长GPR15L和Gi3.3结合的高分辨率结构.
- 确定了定义GPR15L识别和选择性决定子口袋的关键相互作用.
- 分子动力学模拟表明,GPR15的N端硫化稳定了GPR15-GPR15L相互作用.
- 分子对接在潜在的小分子对手中确定了抑制受体激活的保守模式.
结论:
- 确定的结构为GPR15功能和GPR15L结合提供了关键的分子洞察力.
- 这些发现阐明了GPR15L选择性和受体激活的机制.
- 这项研究为开发针对炎症和免疫疾病的GPR15的新型治疗剂奠定了基础.
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