不同的3D基因组架构和印制基因表达:原因还是结果?
Benoit Moindrot1, Yui Imaizumi2, Robert Feil2
1Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Gif-sur-Yvette, France.
Biochemical Society transactions
|May 22, 2024
概括
印制基因将基因组架构和基因表达联系起来. 由DNA甲基化和CTCF结合驱动的差异色素循环,在发育早期建立了亲代基因特异性表达.
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.
- 发展生物学 发展生物学
背景情况:
- 印记的基因表现出亲代基因特异性表达,这对发育至关重要.
- 它们的调节涉及染色体域内的调节性DNA序列的父母甲基化印记.
- 了解基因组架构和印记基因表达之间的相互作用是关键.
研究的目的:
- 探索基因组架构与印记基因表达之间的关系.
- 为了研究差异性染色体组织如何促进等位基特异性转录.
- 检查基因表达对基因组组织的相互影响.
主要方法:
- 基于染色体形状捕获 (3C) 的研究.
- 在印记区域中分析拓关联域 (TADs).
- 在不同甲基化区域研究CTCF和凝聚素结合模式.
主要成果:
- 父母染色体之间的TADs在印记域上的差异组织.
- 在非甲基化等位基上,CTCF和凝聚素的等位基结合.
- 产生差异色氨酸循环,促进等位基因表达.
- 转录影响基因组组织的相互影响的证据.
结论:
- 经表观遗传控制的差异性基因组架构先于并促进了印记基因表达.
- 单基因基因表达也可以影响某些印记域的基因组架构.
- 这种动态的相互作用是发展过程的基础.
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