卡波西的肉瘤相关的疹病毒终端重复调节可诱导的Lytic基因促进体
Yoshihiro Izumiya1,2, Adhraa Algalil1,3, Jonna M Espera1
1Department of Dermatology, School of Medicine, University of California Davis, Sacramento, California, USA.
Journal of virology
|January 19, 2024
概括
卡波西的肉瘤相关疹病毒 (KSHV) 终端重复作为增强剂,通过延迟相关核抗原 (LANA) 调节病毒基因表达. 这一发现提出了KSHV延迟-立式交换机的新模型.
科学领域:
- 分子病毒学分子病毒学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因规则 基因规则
背景情况:
- 卡波西的肉瘤相关性疹病毒 (KSHV) 具有独特的编码区域,其旁边是终端重复 (TR).
- 基因增强剂是控制基因表达的关键 cis 调节元素.
- 在病毒基因表达中KSHV TR序列的调节作用仍然在很大程度上未被描述.
研究的目的:
- 为了研究KSHV TR序列的转录调节功能.
- 阐明延迟关联核抗原 (LANA) 在TR介导基因调节中的作用.
- 提出一种KSHV基因表达控制模型,涉及TRs.
主要方法:
- 染色体免疫沉,其次是核酶分裂,以确定与TRs结合的蛋白质.
- 分析TR区域中的组蛋白修饰 (H3K27Ac,H3K4me3) 和新生的RNA表达.
- 报告员试验评估TRs对KSHV复制和转录激活器 (K-Rta) 和LANA的病毒基因促进活性和交换激活的影响.
主要成果:
- KSHV TRs被LANA和LANA相互作用的基因组修饰酶所占据.
- 转基因表现出基因组修饰 (H3K27Ac,H3K4me3) 并表达新生的RNA,作为增强剂.
- TRs增强KSHV诱导基因促进体活性,增加K-Rta的交换活化,并通过LANA授予促进体抑制.
结论:
- KSHV TRs作为病毒诱导基因的增强剂,主要由LANA调节.
- 建议TR可访问KSHV基因促进体,以调节病毒延迟-性开关.
- 这项研究为KSHV基因调节和病毒再激活机制提供了新的见解.
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