一个新的类型的人类CpG岛屿促进者与灵长类动物的重复特异性
K Naga Mohan1,2, Anuhya Anne3, Lov Kumar4
1Molecular Biology and Genetics laboratory, Department of Biological Sciences, Birla Institute of Technology and Science, Centre for Human Disease Research, Birla Institute of Technology and Science, Hyderabad Campus, Pilani, Hyderabad, India. mohankn@hyderabad.bits-pilani.ac.in.
Scientific reports
|July 30, 2025
概括
双重重复的CpG岛屿 (TRs) 在人类基因促进体中被发现,在发育过程中影响基因调节和甲基化. 这些TR-CpG岛屿抵抗干细胞的重编程,影响基因表达.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 进化生物学 进化生物学
背景情况:
- 印记控制区域 (ICR) 与CpG岛屿和不完美的并列重复 (TR) 对于基因组印记至关重要.
- 在非印制的CpG岛屿推广器中,这种特征的存在尚未得到充分理解.
研究的目的:
- 在人类基因组中,研究不完美的并列重复 (TRs) 与CpG岛屿促进者的关联.
- 确定与TR相关的CpG岛屿促进者的进化和监管意义.
主要方法:
- 对人类和老鼠基因组进行了广泛的点图分析.
- 鉴定和描述与不完善的TRs相关的人类CpG岛屿基因促进体.
- 对甲基化水平,转录水平和TR-CpG岛屿的进化史的分析.
主要成果:
- 确定了342个与不完美的TRs (≥400bp) 相关的人类CpG岛屿基因促进体.
- TR-CpG岛屿富含神经发育/行为障碍基因,并表现出个体间甲基化变异.
- 一个TR-CpG群岛的子集是高度甲基化,抵抗对原始化的iPSCs的重编程,并在灵长类动物中显示进化丰富.
结论:
- 将TR纳入CGI促进体会影响人类发育过程中的甲基化获取和对干细胞重编程的抵抗.
- TR-CpG岛屿具有基因调节潜力,影响转录水平并可能导致疾病.
- TR-CpG岛屿是哺乳动物进化的重要特征,特别是在灵长类动物中.
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