基于结构的SIGMA 1受体与配体和胆固醇相互作用的建模及其对其生物功能的影响
Meewhi Kim1, Ilya Bezprozvanny1,2
1Department of Physiology, UT Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.
International journal of molecular sciences
|August 26, 2023
概括
对于神经元健康至关重要的西格玛1受体 (S1R) 可能通过两种构造发挥作用:动态和定单体. 该模型解释了S1R调节器如何影响神经退行性和神经精神疾病治疗.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 西格玛1受体 (S1R) 是细胞内膜网中的一个跨膜蛋白质,对神经元健康至关重要,也是神经系统疾病的治疗点.
- 尽管它具有重要意义,但S1R的精确生物和信号功能仍然在很大程度上是未知的.
- 了解S1R的机制对于开发治疗神经退行性和神经精神疾病的有效方法至关重要.
研究的目的:
- 阐明西格玛1受体 (S1R) 的生物和信号功能.
- 根据其与细胞膜内的配体和胆固醇的相互作用,提出S1R功能的结构模型.
- 为S1R调节器的神经保护作用提供机制性见解.
主要方法:
- 利用最近发表的人类和XenopusS1Rs的晶体结构.
- 在膜环境中进行结构建模,分析S1R与连接体和胆固醇的相互作用.
- 结合S1R序列的生物信息学分析与结构建模方法.
主要成果:
- 提出了一个模型,其中S1R存在于两个构造:一个动态单体 (DM) 和一个固定单体 (AM).
- 假设AM和DM结构之间的平衡对S1R的细胞功能至关重要,影响寡合化和脱寡合化.
- 预测膜胆固醇和S1R抗体促进寡合化,而激素和突变则有利于脱寡合化,与现有数据一致.
结论:
- 拟议的双构造模型为S1R的信号功能提供了机械的洞察力.
- 这种模型可能有助于解释神经疾病中S1R调节器的神经保护机制.
- 对S1R形态动态的进一步研究可以推进神经退行性和神经精神疾病的治疗策略.
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