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在乌中,染色质可访问性,而不是5mC甲基化体,具有部分剂量补偿

Ana Catalán^1,2, Justin Merondun², Ulrich Knief^2,3

¹Department of Evolutionary Biology, Evolutionary Biology Centre (EBC), Uppsala University, Uppsala, Sweden.

|September 25, 2023

概括

雌乌通过Z链基因上调来实现部分剂量平衡,这与增加的染色质可访问性有关. 这种表观遗传机制有助于调节雌性异性生殖系统中的基因剂量.

科学领域:

进化遗传学的进化遗传学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
进行比较的基因组学.

背景情况:

遗传性决定系统面临的挑战是性染色体剂量不平衡.
男性异性恋系统使用表观遗传机制来补偿剂量.
雌性异构体系统表现出部分剂量补偿,其潜在机制尚不清楚.

研究的目的:

研究女性异性婚姻系统中部分剂量平衡和补偿的机制.
量化欧亚乌的基因表达和表观遗传调节.
确定染色质可访问性和DNA甲基化在剂量调节中的作用.

主要方法:

在雄性和雌性欧亚乌中基因表达概况.
使用ATAC-seq.进行染色体可访问性分析.
5mC甲基化分析. 5mC甲基化分析.

主要成果:

雌乌显示了Z-链接基因的调节,与增加的Z染色体染色质可访问性相关.
5mC甲基化是特定于组织和性别的,但与基因剂量没有直接关系.
升级分布在Z染色体上,没有局部的调节中心.

结论:

雌性异构系统中的部分剂量平衡是由Z染色体的全染色体表观遗传控制驱动的.
差异性染色质可访问性是这种表观遗传调节的关键媒介.
结果提供了关于性别确定和剂量补偿的演变的见解.

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