CCCTC-结合因子N-终端域通过增强凝聚过程性来调节聚类原cadherin基因表达
1Center for Comparative Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, State Key Laboratory of Medical Genomics, Institute of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China.
The Journal of biological chemistry
|February 23, 2025
概括
CCCTC结合因子 (CTCF) 增强了凝聚素挤出DNA循环的能力,这是3D基因组折叠的关键过程. 这一发现挑战了关于CTCF在基因组组织中的作用的传统观点.
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:
- 已知CCCTC结合因子 (CTCF) 在3D基因组折叠中发挥作用.
- 据认为,CTCF可以定或阻止凝聚力介导的循环挤出,但其精确的机制尚不清楚.
研究的目的:
- 调查CTCF在调节凝聚环挤出过程性中的作用.
- 探索CTCF影响3D基因组折叠的机制,使用集群原cadherin (cPcdh) 作为模型.
主要方法:
- 作为一个模型系统,利用了聚类原cadherins (cPcdh).
- 研究了一种特定的CTCF突变 (CTCFY226A/F228A) 在N端域中的影响.
- 对比了CTCF突变对不同Pcdh基因集群 (α,β和γ) 的影响.
主要成果:
- Pcdhβ基因集群受到CTCFY226A/F228A突变的显著影响,特别是考虑到它与远端增强器的远程距离.
- 观察到的对凝聚素过程性的影响模仿了WAPL过度表达的效应.
- 通过其在cPcdh基因中的N终端YDF基因,CTCF以基因间距离偏差的方式增强了凝聚蛋白的丰富性.
结论:
- CTCF积极促进或增强凝聚环挤出,而不是仅仅阻止它.
- CTCF的N端YDF基因在聚类原cadherin基因内以取决于距离的方式增强凝聚素丰富方面发挥着至关重要的作用.
- 这项研究完善了我们对CTCF在3D基因组折叠和调节中的作用的理解.
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