PARP14受PARP9/DTX3L复合体的调节,并促进干扰素γ诱导的ADP-ribosylation
Victoria Chaves Ribeiro1, Lilian Cristina Russo1, Nícolas Carlos Hoch2
1Department of Biochemistry, University of São Paulo, São Paulo, 05508-000, Brazil.
The EMBO journal
|June 4, 2024
概括
主体ADP-ribosylation对于抗病毒防御至关重要,由PARP14和PARP9/DTX3L复合体进行介导. SARS-CoV-2 Nsp3通过水解ADP-ribosylation修饰来对抗这种宿主反应.
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:
- 蛋白质ADP-ribosylation与抗病毒信号传递有关,包括干扰素反应.
- 像冠状病毒这样的病毒拥有逆转宿主ADP-ribosylation的水解酶,这表明它在宿主-病原体相互作用中的重要性.
- 特定的宿主ADP-ribosyltransferases,它们的点,以及它们对病毒感染的影响仍然在很大程度上未知.
研究的目的:
- 为了识别参与抗病毒信号传递的宿主ADP-ribosyltransferases.
- 阐明这些酶调节宿主对病毒感染反应的机制.
- 为了研究宿主ADP-ribosylation和病毒抗击机制之间的相互作用.
主要方法:
- 研究的干扰素- (IFNγ) 诱导的ADP-ribosyltransferase活性.
- 分析了PARP14,PARP9和DTX3L在调节蛋白质水平和定位方面的作用.
- 研究了这些复合体在IFNγ诱导的细胞质内含的局部化.
- 评估了SARS-CoV-2 Nsp3宏基因在ADP-ribosylated蛋白质上的水解活性.
主要成果:
- 由IFNγ诱导的宿主ADP-ribosylation活性依赖于PARP14的催化活性.
- 通过翻译后的修改,PARP9/DTX3L复合体维持了PARP14蛋白水平.
- PARP14,PARP9/DTX3L和ADP-ribosylated蛋白共同定位在IFNγ诱导的细胞质内含物中.
- PARP14和DTX3L是PARP14介导的ADP-ribosylation的基质. PARP14和DTX3L是PARP14介导的ADP-ribosylation的基质. PARP14和DTX3L是PARP14介导的ADP-ribosylation的基质. PARP14和DTX3L是PARP14介导的ADP-ribosylation的基质. PARP14和DTX3L是PARP14介导的ADP-ribosylation的基质.
- 在SARS-CoV-2 Nsp3宏基因中,这些ADP-ribosylation修饰物被水解.
结论:
- PARP9/DTX3L复合体和PARP14是宿主的IFNγ诱导的抗病毒ADP-核糖化反应的关键组成部分.
- 通过消除关键的ADP-ribosylation标记,SARS-CoV-2 Nsp3通过消除关键的ADP-ribosylation标记来对抗宿主抗病毒防御.
- 这项研究揭示了宿主ADP-ribosyltransferases和病毒对抗机制之间的复杂相互作用.
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