脂肪10抑制TRIM21,从而降低抗病毒I型干扰素分泌的下调
Kritika Saxena1, Katharina Inholz1, Michael Basler1,2
1Department of Biology, Division of Immunology, University of Konstanz, Konstanz, Germany.
Life science alliance
|July 8, 2024
概括
脂肪酸转位酶 (FAT10) 针对TRIM21进行降解,减少流感A病毒感染期间I型干扰素的产生. 这揭示了FAT10调节抗病毒反应的新机制.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- I型干扰素 (IFN) 对于抗病毒防御至关重要,而A型流感病毒感染刺激了它们的产生.
- E3结合酶TRIM21通过正反循环积极调节I型IFN的产生.
- 类似于乌比奎丁的修饰剂FAT10负面调节了I型IFN反应,并向蛋白质体降解的基质.
研究的目的:
- 调查FAT10和TRIM21之间的相互作用.
- 阐明FAT10在调节TRIM21稳定性和流感A病毒感染期间I型IFN产生中的作用.
主要方法:
- 研究了FAT10与TRIM21的共价结合.
- 确定了TRIM21和FAT10的领域,这些领域对于它们的相互作用至关重要.
- 评估了FAT10对TRIM21无化和蛋白质体降解的影响.
- 在FAT10介导的TRIM21降解的背景下测量IFNβ产量.
主要成果:
- 脂肪10与TRIM21共结合,使其成为蛋白质酶体降解的目标.
- 在这种相互作用中,TRIM21的coil-coil和PRYSPRY域以及FAT10的C终端滴糖基因对这种相互作用至关重要.
- 通过FAT10介导的TRIM21降解降低了TRIM21的整体泛化,并在流感A病毒感染期间减少IFNβ的产生.
结论:
- FAT10通过降低RIG-I信号通路中的关键调节器TRIM21来降低抗病毒I型IFN的产生.
- 这项研究揭示了一种新的机制,即FAT10调节TRIM21稳定性,并对I型IFN反应产生负面影响.
- FAT10在OTUB1之外的RIG-I信号通路中调节额外的分子,有助于其作为I型IFN的负调节器的作用.
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