通过增殖细胞核抗原相互作用体的近距离生物化来识别DNA损伤反应者的协议
Roberta Borosta1, István Szepesi-Nagy2, István Kató3
1MTA-HUN-REN RCNS Lendulet "Momentum" DNA Repair Research Group, Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, 1117 Budapest, Hungary; Doctoral School of Biology, Faculty of Science, Eötvös Loránd University, 1117 Budapest, Hungary.
STAR protocols
|October 11, 2025
概括
这项研究详细介绍了TurboID近距离标记的协议,以确定在增殖细胞核抗原 (PCNA) 附近的蛋白质相互作用. 该方法使用稳定的细胞系和质谱学来发现本地细胞环境中的生物化蛋白质.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 像TurboID这样的近距离标记技术对于在现场研究蛋白质与蛋白质相互作用至关重要.
- 了解蛋白质相互作用是解读细胞机制和疾病途径的关键.
研究的目的:
- 建立基于TurboID的近距离标签与增殖细胞核抗原 (PCNA) 融合的详细协议.
- 产生稳定的细胞系,用于研究DNA损伤和细胞周期进展的背景下蛋白质相互作用.
主要方法:
- 将TurboID融合到PCNA,并使用lentiviral转导生成稳定的细胞系.
- 细胞同步,诱导DNA损伤,以及靠近依赖生物化.
- 细胞分离,生物化蛋白的亲和力净化,以及质谱分析.
主要成果:
- 成功生成表达PCNA-TurboID融合蛋白的稳定细胞系.
- 在特定的细胞条件下 (例如,DNA损伤) 识别近端生物化蛋白质.
- 证明该协议在捕获特定环境蛋白相互作用方面的有效性.
结论:
- 本方案为PCNA相互作用蛋白的研究中TurboID近距离标记提供了一种可靠的方法.
- 这种技术有助于在它们的原生细胞环境中发现新型蛋白质相互作用.
- 该协议对DNA修复,细胞循环调节和癌症生物学研究有价值.
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