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推动TAD边界:在3D基因组中解码聚类CTCF位点的绝缘体代码

Haiyan Huang¹, Qiang Wu¹

¹Center for Comparative Biomedicine, State Key Laboratory of Medical Genomics, Institute of Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China.

BioEssays : news and reviews in molecular, cellular and developmental biology

|August 22, 2024

概括

由CTCF站点标记的拓关联域 (TAD) 边界调节了基因组架构. 最近的发现揭示了CTCF定向和RNA介导的R循环如何控制TAD之间的增强剂-促进剂相互作用.

科学领域:

基因组学就是基因组学.
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:

拓关联域 (TADs) 对3D基因组组织至关重要.
TAD边界,通常与聚类CTCF站点丰富,决定增强剂-促进剂 (E-P) 相互作用.
边界的CTCF站点可以阻止或促进TAD内部或跨TAD的互动.

研究的目的:

在TAD边界阐明CTCF绝缘体代码的组织原理.
了解TAD之间增强剂-促进剂相互作用调节的机制.
为RNA介导的TAD边界函数提供一个统一的模型.

主要方法:

审查了解CTCF绝缘体代码的近期进展.
分析CTCF站点方向及其在凝聚环挤出中的作用.
研究边界堆叠和增强聚类效应.
探索RNA介导机制,包括R循环形成.

主要成果:

面向内向外的CTCF站点通过阻断凝聚环挤出,充当拓绝缘体.
边界堆叠和增强器聚类促进了跨多个TAD的远距离EP相互作用.
通过RNA介导的R循环形成为TAD边界绝缘和促进提供了一个统一的机制.

结论:

在隔离基因组架构中,CTCF位点的定向和排列是关键.
RNA在调节3D基因组折叠和EP特异性方面发挥着重要作用.
了解这些机制对于发育调节和基因组折叠原理至关重要.

关键词:

三维基因组的3D基因组在R-loop中使用R-loop.在TAD的边界上.集群的CTCF站点是集群的CTCF站点凝聚力在凝聚力中增强剂是一种增强剂.绝缘体的绝缘体是一个绝缘体

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