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In Vitro SUMOylation Assay to Study SUMO E3 Ligase Activity
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细胞SUMO特异性蛋白酶调节HAdV-C5 E1B-55K SUMOylation和病毒诱导的细胞转化
Wing-Hang Ip1, Marie Fiedler1, Britta Gornott1
1Department of Viral Transformation, Leibniz Institute of Virology (LIV), Hamburg, Germany.
Frontiers in cellular and infection microbiology
|October 14, 2024
概括
人类腺病毒 (HAdV) 蛋白E1B-55K被SENP 1去SUMOylated,影响其在细胞转化中的作用. 这种独立于E4orf6的相互作用揭示了对HAdV复制和宿主相互作用的新见解.
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:
- 病毒蛋白在人类腺病毒 (HAdV) 复制过程中经历了翻译后的修饰,包括SUMO结合.
- SUMOylation 影响蛋白质定位和细胞转化,HAdV 蛋白 E1B-55K 是一个关键的目标.
- 腺病毒瘤蛋白E4orf6会影响E1B-55K的SUMOylation,而细胞中士林/SUMO特异性蛋白酶 (SENPs) 则会逆转这种修饰.
研究的目的:
- 为了研究HAdV上蛋白E1B-55K和细胞SENPs之间的相互作用.
- 了解SENPs在E1B-55K上的脱SUMOylation活动.
- 阐明E1B-55K脱SUMOylation对腺病毒媒介细胞转化的后果.
主要方法:
- 同免疫沉测试检测蛋白质相互作用.
- 西方涂抹用于分析SUMOylation和deSUMOylation水平.
- 焦点形成测试用于评估细胞转化能力.
主要成果:
- E1B-55K 直接与 SENP 1 相互作用.
- SENP 1 脱SUMOylates E1B-55K 独立于病毒瘤蛋白 E4orf6.6.
- 在动物细胞中,SENP 1 抑制了E1A/E1B介导的焦点形成,这表明它在阻止细胞转化方面发挥了作用.
结论:
- SENP 1 在调节 E1B-55K SUMOylation 状态方面发挥着至关重要的作用.
- E1B-55K与SENP 1之间的相互作用是控制HAdV介导细胞转化的一个重要因素.
- 这些发现为进一步研究腺病毒与宿主相互作用以及HAdV.的瘤机制提供了基础.
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