宿主蛋白激酶C:新型的基因激活蛋白激酶 (MAPK) 特定支架调节流感病毒核出口的核核蛋白质复合体
Indrani Das Jana1, Soumik Dey1, Manoj Si1
1Department of Bioscience and Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India.
PLoS pathogens
|December 31, 2025
概括
蛋白激酶Cαα (PKCα) 作为支架蛋白,桥接ERK2和流感病毒核蛋白 (NP),促进病毒复制. 这种相互作用对VRNP核出口和病毒传播至关重要.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 宿主蛋白激酶C (PKC) 异型调节流感病毒的复制.
- PKCα激活了Raf/MEK/ERK-MAPK通路,促进病毒核核蛋白 (vRNP) 的核出口.
- 在流感病毒复制中PKCα介导的MAPK激活的确切机制尚不清楚.
研究的目的:
- 阐明PKCα在流感病毒复制过程中激活MAPK级联中的分子机制.
- 研究PKCα作为基架蛋白在酶基质相互作用中的作用.
- 确定PKCα介导的NP酸化对病毒传播的意义.
主要方法:
- 利用对模拟敏感的激酶技术,通过ERK2.2识别流感病毒核蛋白 (NP) 上的直接酸化位.
- 研究了涉及PKCα,MEK1,ERK2和NP的多蛋白质综合体的形成和局部化.
- 采用PKCα的主导阴性变异来评估其在复杂形成,vRNP出口和病毒产生中的作用.
主要成果:
- PKCα作为MAPK特定的支架,促进ERK2和流感病毒NP之间的稳定相互作用.
- ERK2直接在特定的残留物中化NP,促进vRNP核出口,并使病毒传播成为可能.
- 一个含有PKCα的多蛋白质复合体调节ERK2激活和NP酸化,局限于细胞核,然后是细胞质.
- 抑制PKCα会破坏复合体的形成,vRNP的输出和后代病毒的产生.
结论:
- 通过作为ERK2-NP相互作用的支架,PKCα是流感病毒复制的关键调节者.
- 这项研究揭示了PKCα和MAPK通路之间的交叉交谈的新机制,以支持流感A和B病毒的复制.
- 准PKCα-MAPK通路可能为抗病毒疗法提供新的策略.
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