对TRIM家族PRYSPRY域的结构分析及其对E3联体设计的影响
Rezart Zhubi1,2, Apirat Chaikuad1,2, Christian J Muñoz Sosa1,2
1Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, 60438 Frankfurt am Main, Germany.
Journal of structural biology: X
|August 18, 2025
概括
三分 motif (TRIM) 蛋白质,关键的 E3 无素连接酶,具有 PRYSPRY 域,结构保留,但结合点不同. 这种结构多样性影响基质的特异性,并为开发针对这些TRIM蛋白的新药提供了潜力.
科学领域:
- 结构生物学是结构生物学.
- 生物化学 生物化学
- 分子遗传学 分子遗传学
背景情况:
- 三方基因 (TRIM) 蛋白质是一个大型的RING型E3泛基因酶家族.
- 许多TRIM蛋白质具有PRYSPRY域,这是它们C端区域的关键相互作用模块.
- PRYSPRY域是通过ubiquitin-proteasome路径开发新型降解物的潜在目标.
研究的目的:
- 从九种TRIM家族蛋白质中确定PRYSPRY域的晶体结构.
- 调查TRIM PRYSPRY域子家族内的结构性保护和分歧.
- 探索结构变异对基质特异性和潜在药物适应性的影响.
主要方法:
- 使用X射线晶体学来确定九个TRIM PRYSPRY域的结构.
- 进行了比较结构分析,以确定保存的特征和变异.
- 在MID1中与X链接Opitz综合征相关的Missense突变被映射到结构上.
主要成果:
- 在所有9个PRYSPRY域中观察到总体保留的β-sandwich拓,尽管具有低序列同质性.
- 在基质结合部位附近的循环的显著变化表明基质特异性和结合方式不同.
- TRIM36表现出一种独特的二分化基因,遮住其基质结合部位,MID1突变可能会影响蛋白质的稳定性.
结论:
- 结构数据显示,TRIM PRYSPRY域之间存在显著的功能差异,特别是在基质识别方面.
- PRYSPRY域的结构可塑性和可药性性质为连接体设计提供了机遇和挑战.
- 了解这些结构变异对于开发基于TRIM蛋白的向疗法至关重要.
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