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凝聚蛋白将表观遗传阅读器Phf2放置在基因组内

Wen Tang¹, Lorenzo Costantino¹, Roman Stocsits¹

¹Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, 1030, Vienna, Austria.

The EMBO journal

|January 3, 2025

概括

基因组脱甲基酶Phf2与凝聚素相互作用,充当表观遗传阅读器. 这种相互作用会影响DNA循环挤出,影响基因调节和染色质组织.

科学领域:

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.
基因组学就是基因组学.

背景情况:

基因组DNA由基因组和DNA环由凝聚力组织成色素.
基因组调节中的基因组修饰和凝聚素之间的相互作用在很大程度上仍未被探索.

研究的目的:

为了研究基因组修饰和凝聚素介导的基因组架构之间的功能关系.
识别与凝聚素相互作用并调节其功能的新型蛋白质.

主要方法:

共同免疫沉用于识别凝聚素相互作用蛋白质.
染色体免疫沉,然后进行测序 (ChIP-seq) 以映射蛋白质定位.
使用RNA干扰 (RNAi) 评估蛋白质功能的耗尽研究.
分析染色体部分和循环结构.

主要成果:

鉴定出Phf2,一种基因组脱甲基酶,作为一种与凝聚素相互作用的蛋白质.
Phf2在活跃的转录起始点 (TSS) 与H3K4me3结合,并与凝聚素共定位.
凝聚素枯竭影响Phf2局部化,而Wapl和CTCF枯竭改变了这两种蛋白质的全基因组分布.
Phf2 枯竭会影响 TSS 的凝聚素结合,减少短凝聚素循环的形成,并扩大异色B 区.

结论:

Phf2作为一个表观遗传阅读器,由凝聚素介导的DNA循环挤出指导.
Phf2在招募凝聚物到活跃的TSS中发挥作用,并调节异色色区的尺寸.
这项研究揭示了表观遗传机制和DNA结构蛋白在真核生物基因组调节中的新型合作关系.

关键词:

染色是一种染色素.分区分区分区.在DNA循环挤出过程中.表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.中小企业综合体SMC综合体

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