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IntS6和集成酸酶模块调整了选择过早转录终止事件的效率

Rina Fujiwara¹, Si-Nan Zhai², Dongming Liang³

¹Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Therapeutic Innovation Center, Baylor College of Medicine, Houston, TX 77030, USA.

|November 23, 2023

概括

整合器综合体的整合器综合体

科学领域:

分子生物学分子生物学
基因法规基因法规
生物化学生物化学

背景情况:

整合器复合体对于处理小核RNA (snRNA) 和调节蛋白质编码基因的转录终结至关重要.
整合器具有RNA内核酶和蛋白质酸酶活动,但这些活动对其功能的必要性尚未完全理解.
单个子单元 (如IntS6) 在调节集成器的功能的具体作用还有待阐明.

研究的目的:

调查整合器蛋白质酸酶活性在调节基因转录中的功能要求.
确定特定的子单元,如IntS6,是否负责在不同的基因位置调解酸酶活性.
探索IntS6影响整合器复合体功能及其与其他细胞组件的相互作用的机制.

主要方法:

在Drosophila中过度表达IntS6亚单元,观察其对整合体复合体功能的影响.
分析整合器对各种基因位置的snRNA处理和转录终止的影响.
研究IntS6与蛋白质酸酶2A (PP2A) 子单元和正规PP2A B子单元的相互作用.

主要成果:

IntS6的过度表达特别抑制了蛋白质编码基因的一个子集的整合器功能,而不会影响snRNA处理或其他基因位置.
IntS6的过度表达导致蛋白酸酶2A (PP2A) 子单元的定位,这表明PP2A在调节特定基因的整合器活性方面发挥着至关重要的作用.
IntS6与PP2A调节B子单元的作用类似,因为规范B子单元的过度表达也抑制了整合器活动,这表明了保留的调节机制.

结论:

集成体综合体的蛋白酸酶模块对于集成体调节基因的特定子集至关重要.
将PP2A招募到集成器综合体是调节转录终止效率的关键监管步骤.
这项研究揭示了一种可调节的机制,通过调节整合器的酸酶活性来控制转录终止.

关键词:

3′ 终端加工在INTACTAC中使用.整合器复合体是一个整合器复合体.集成器子单元6 集成器子单元6 在PP2A中,PP2A是PP2A.的RNA聚合酶II.活动主办方-近端终止蛋白酸酶2A是一种蛋白酸酶.这是一个 snRNA.转录转录是一种转录.

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