在终端重复 (TR) 上的LANA-依赖转录-复制冲突和R-循环与KSHV插件维护相关
Asim Asghar1, Olga Vladimirova1, Asher Sobotka1
1The Wistar Institute, Philadelphia, PA 19104.
bioRxiv : the preprint server for biology
|March 31, 2025
概括
卡波西的肉瘤相关性疹病毒 (KSHV) 核抗原LANA在病毒终端重复 (TR) 中诱导R循环,促进插曲维护. 这涉及基因组修饰和转录复制冲突,这对于KSHV基因组稳定性至关重要.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 转录复制冲突在重复的DNA元素中很常见,这些元素对于基因组维护至关重要.
- KSHV核抗原LANA与病毒终端重复 (TR) 结合,以维持发作.
研究的目的:
- 调查LANA在KSHV TR的转录复制冲突和R循环形成中的作用.
- 了解 KSHV 在延迟期期间维持 KSHV 情节的基础机制.
主要方法:
- 接近结合试验 (PLA) 检测蛋白质的同位化.
- 用S9.6抗体进行DNA-RNA免疫沉 (DRIP),以识别R-循环.
- 分析基因素修饰 (H3pS10) 和异色彩标记.
主要成果:
- 在KSHV TR中,LANA结合点是转录复制冲突的地点.
- PCNA和RNAPII与LANA核体同位;R环在TR形成.
- R循环与基因素H3pS10有关,这是转录复制冲突的标志物.
- RNA聚合酶抑制会破坏LANA结合,R环,以及相关的基因素修饰.
- 拉纳以复制依赖的方式诱导这些特征,与插曲维护相关.
结论:
- 拉纳诱导与RNA和DNA聚合酶活性和R循环形成相关的基因素修饰.
- 在KSHV TR的R-循环形成对于在延迟期间的插曲维护至关重要.
- 结果提供了关于KSHV插曲维护和一般重复性DNA基因组维护的见解.
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