细菌乌比基 ADP-ribosyltransferase CteC 的晶体结构揭示了一个基质招募插入的基质
Zhengrui Zhang1, Hannah M Rondon-Cordero1, Chittaranjan Das1
1Department of Chemistry, Purdue University, West Lafayette, Indiana, USA.
The Journal of biological chemistry
|December 30, 2023
概括
这项研究揭示了细菌效应剂CteC如何通过附加ADP-ribosylation来向泛素 (Ub). 了解CteC 的意思
科学领域:
- 分子生物学分子生物学
- 生物化学 生化学
- 结构生物学 结构生物学
- 微生物学 微生物学
- 宿主-病原体相互作用
背景情况:
- ADP-ribosylation是一种关键的翻译后修饰,调节细胞过程.
- 病原体利用ADP-ribosylation进行宿主操纵.
- 来自Chromobacterium violaceum的细菌效应剂CteC通过ADP-ribosylating ubiquitin (Ub) 抑制宿主ubiquitin信号传递.
研究的目的:
- 阐明CteC效应器对基质识别的分子基础.
- 调查CteC.的蛋白质和残留水平的特异性.
- 了解CteC在宿主-病原体相互作用中的结构特征和酶机制.
主要方法:
- 蛋白质和残留水平基质特异性测定.
- 进行X射线晶体学以确定CteC-NAD+复合结构.
- 生物化学和生物物理研究分析酶活性和结合.
主要成果:
- CteC的晶体结构揭示了具有插入域的正规单-ADP-ribosyltransferase折叠,与AlphaFold预测不同.
- 生物化学研究发现了独特的NAD+结合口袋特征和UB比UB类修饰剂的选择性.
- 插入域在基质识别中起着关键作用.
结论:
- 这项研究为CteC.的酶特异性提供了关键的见解.
- 包括插入域在内的关键结构特征被确定为CteC在宿主-病原体相互作用中的功能.
- 了解CteC的机制可以为针对细菌病原体的策略提供信息.
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