蛋白质组学分析揭示了多重病毒DNA复制启动复合物的新型酸化残留物和相关蛋白质
bioRxiv : the preprint server for biology
|February 19, 2024
概括
这项研究确定了新型酸化部位和相互作用蛋白质,用于多重瘤病毒大T抗原 (LT),DNA聚合酶α-原酶 (Polprim) 和复制蛋白A (RPA). 这些发现为病毒复制,转录和细胞过程提供了新的见解.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 聚瘤病毒大T抗原 (PyV LT) 对于病毒复制至关重要,与DNA聚合酶α-原酶 (Polprim) 和复制蛋白A (RPA) 等细胞因子相互作用.
- 已知这些蛋白质的翻译后修饰 (PTM) 可以调节它们的活性,但缺乏全面的蛋白质组分析.
研究的目的:
- 对PyV LT,Polprim和RPA进行PTM和相关蛋白质的高灵敏性蛋白质组分析.
- 为了识别新的化氨基酸残留物 (PAARs) 和共免疫沉蛋白.
- 阐明这些相互作用和修饰在病毒和细胞过程中的功能作用.
主要方法:
- LT,Polprim和RPA的免疫沉 (IP),其次是高分辨率液体染色学并列质谱学 (LC-MS/MS).
- 蛋白质组学数据的生物信息分析,以确定丰富的生物过程.
- 蛋白质与蛋白质相互作用的验证和新酸化位点的功能分析.
主要成果:
- 在LT,Polprim和RPA复合体中识别了479个新的PAAR.
- 发现了与每个因子相关的以前未报告的共免疫降落蛋白 (374与LT,453与Polprim,183与RPA).
- 生物信息分析揭示了与转录相关的与LT丰富的过程,与Polprim和RPA不同. 与ETS1的相互作用得到了验证,并被证明是核酸独立的. 一种新型的LT PAAR被证明会影响DNA复制.
结论:
- 这项研究提供了关于PyV LT,Polprim和RPA的PAAR和蛋白质相互作用的广泛的新数据.
- 这些发现提高了对DNA复制,病毒转录和宿主-病原体相互作用的理解.
- 鉴定的相互作用和修饰为未来的病毒学和细胞生物学研究提供了潜在的目标.
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