连接体有效性将核受体构成组合在转录活性和抑制状态之间转移
Brian S MacTavish1, Di Zhu2, Jinsai Shang1,3
1Department of Integrative Structural and Computational Biology, Scripps Research and The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, Jupiter, FL, USA.
Nature communications
|February 28, 2025
概括
研究人员开发了一种新型的带系列,用于过氧体增殖器激活受体玛 (PPARγ),可以在激活和抑制功能之间切换. 这一发现增强了对核受体动力学和反向激励机制的理解.
科学领域:
- 分子生物学分子生物学
- 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:
- 核受体 (NRs) 在受结合的影响下,在活性和抑制状态之间动态转换.
- 现有的NR联体序列往往缺乏抑制逆激动因子,限制了对完整的构造组合的探索.
- 了解NRs的完整构造谱对于药物开发和生物见解至关重要.
研究的目的:
- 开发一种具有广泛药理范围的氧酶增殖器激活受体玛 (PPARγ) 的新型连接体系列.
- 调查连接体中的微妙结构修饰如何影响PPARγ活性,包括逆激动.
- 阐明这些连接体对PPARγ的动态形状组合的影响.
主要方法:
- 设计和合成一个针对PPARγ的聚焦联结体序列.
- 利用核磁共振 (NMR) 光谱分析动态形状变化.
- 采用形态与活动关系 (CAR) 分析,以将结构变化与功能结果相关联.
主要成果:
- 确定了一系列PPARγ连接体,从反向激励 (抑制) 到激励 (激活) 的范围.
- 结合体序列中的微妙结构修改被证明可以有效地切换化合物活性.
- 核磁共振和CAR分析显示,这些配体调节PPARγ结构组合,将其转移到在apo/ligand-free受体中观察到的状态.
结论:
- 建立了一个分子框架,通过最小的化学修改来实现增强的PPARγ反向激进作用.
- 证明了使用量身定制的连接物序列动态控制PPARγ构造组合的能力.
- 为了解NR功能提供了新的途径,并开发具有精确药理特征的偏向调节器.
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