在人类细胞中,PARP13在基底和抗病毒状态下对转录组进行调节
Veronica F Busa1,2, Yoshinari Ando1, Stefan Aigner3,4,5
1Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA.
iScience
|March 18, 2024
概括
RNA结合蛋白PARP13对于抗病毒防御至关重要,它调节RNA稳定性和基因表达. 这项研究揭示了PARP13如何通过影响ISGylation机制来支持抗病毒途径,从而为细胞的感染做好准备.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- RNA结合蛋白 PARP13 是先天免疫系统的关键调节者.
- 通过抑制翻译和降解RNA,PARP13在抗病毒反应中发挥着关键作用.
- 它与干扰素刺激基因 (ISG) 相互作用,激活抗病毒途径,包括ISGylation.
研究的目的:
- 研究PARP13在基底和抗病毒条件下的转录基因组调节中的作用.
- 了解PARP13的细胞定位和结合偏好如何在抗病毒反应期间发生变化.
- 阐明PARP13支持ISGylation相关基因表达的机制.
主要方法:
- 增强交联免疫沉 (eCLIP) 用于绘制PARP13结合部位的地图.
- 进行RNA测序 (RNA-seq) 来分析转录组范围内的变化.
- 进行了RNA-蛋白相互作用研究,以调查PARP13-TRIM25的相关性.
主要成果:
- 抗病毒反应会改变PARP13的细胞局部,但不会改变它的RNA结合特异性.
- 发现PARP13支持ISGylation相关基因的表达,包括其辅因子TRIM25.
- 在TRIM25周围确定了PARP13结合的全转录组周期性,由RNA-蛋白相互作用介导.
结论:
- PARP13参与了为抗病毒防御做好准备的细胞环境的建立.
- 它通过限制自己的翻译,控制对特定mRNA池的访问,并增强ISGylation机械表达来实现这一目标.
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