骨质素与GPRC6A金星虫捕捉器的全位结合,以积极调节GPRC6A信号传输
Rupesh Agarwal1,2, Ruisong Ye3, Micholas Dean Smith1,2
1Oak Ridge National Laboratory Center for Molecular Biophysics University of Tennessee Oak Ridge Tennessee USA.
FASEB bioAdvances
|October 14, 2024
概括
骨素 (Ocn) 作为GPRC6A的正调节器 (PAM),GPRC6A是一种参与新陈代谢和激素产生的受体. 这一发现阐明了多种连接物如何激活GPRC6A,从而使新的药物开发成为可能.
科学领域:
- 生物化学 生化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- GPRC6A是C家族G蛋白结合受体,在能量代谢和性激素调节中起作用.
- 它是由各种配体激活的,包括子,L-氨基酸,骨质 (Ocn) 和.
- 了解 GPRC6A 激活的结构基础,对于治疗的发展至关重要.
研究的目的:
- 阐明由多个不同的配体类别激活GPRC6A的基础结构框架.
- 研究不同GPRC6A配体的结合部位和作用机制.
- 为开发新型GPRC6A调制器提供结构基础.
主要方法:
- 使用AlphaFold2.2.创建一个GPRC6A结构模型.
- 探索假定连接体结合位点,包括金星 (VFT) 域中的一个正位点和两个正模拟器 (PAM) 位点.
- 预测的结合部位和连接体相互作用的实验验证.
主要成果:
- 在VFT域中识别了一个假定的ortosteric配体结合位点和在GPRC6A内两个PAM位点.
- 证据表明,Ocn可以通过结合与和L-氨基酸的VFT位点,而与和L-氨基酸的ortosteric位点不同,作为PAM的功能.
- 证明替代拼接的GPRC6A异型和特定突变破坏了Ocn激活,支持预测的Ocn结合部位.
结论:
- 骨素作为GPRC6A的阳性全调节剂,结合到VFT域中的一个不同的位点.
- 这项研究提供了一个结构性的解释,如何不相似的配体激活GPRC6A.
- 这些发现为开发针对代谢和荷尔蒙条件的GPRC6A的新型治疗分子铺平了道路.
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