在基碳酸受体HCAR2上,正体连接体选择性和体探针依赖性
Lin Cheng1, Suyue Sun2, Heli Wang2
1Department of Otolaryngology Head and Neck Surgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610000, China.
氧碳酸受体2 (HCAR2) 的冷-EM结构揭示了激动剂如何结合于orthosteric和扩展的口袋. 这为开发治疗失脂症和炎症的新疗法提供了对HCAR2信号的见解.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 碳酸受体2 (HCAR2) 是一种G蛋白结合受体 (GPCR),参与抗脂质和抗炎症过程.
- 虽然HCAR2是脂障碍和炎症疾病的潜在治疗标,但其信号传递机制尚未完全理解.
研究的目的:
- 通过确定Gi-合HCAR2与激动剂结合的冷电子显微镜 (cryo-EM) 结构来阐明HCAR2信号的结构基础.
- 为了研究orthosteric和allosteric连接体的结合方式及其对HCAR2活性的影响.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定HCAR2.的结构.
- 药理学测试用于评估连接体结合和功能活性.
主要成果:
- 解决了Gi-合HCAR2与激动剂MK-6892的2.60 Å冷-EM结构.
- 发现MK-6892既结合于正经结合口袋 (OBP),也结合于延长结合口袋 (EBP).
- 在HCARs亚家族中,OBP对连接体选择性至关重要,而全调节器化合物9n表现出探针依赖的行为.
结论:
- 该研究提供了高分辨率的结构洞察力,了解由orthosteric和allosteric连接体激活HCAR2.
- 这些发现加深了对HCAR2信号通路的理解,有助于合理设计用于代谢和炎症疾病的治疗方法.
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