Set1-COMPASS微调H3K4甲基化模式的N终端乙化
Hyeonju Woo1, Junsoo Oh2, Yong-Joon Cho2,3
1Department of Life Science and Multitasking Macrophage Research Center, Ewha Womans University, Seoul 03760, Republic of Korea.
Science advances
|July 12, 2024
概括
通过N端乙转移酶 (NATs) 对Set1-COMPASS蛋白质的N端乙化微调H3K4甲基化模式. 删除NatA显著降低了H3K4me3水平,改变了H3K4me2的分布,影响了基因调节.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 基因组H3 lysine 4 (H3K4) 甲基化是基因调节的关键表观遗传标记,主要由Set1-COMPASS复合体介导.
- 管理Set1-COMPASS活动的翻译后修改在很大程度上仍然没有特征.
- N-终端乙化代表了基因组修饰酶的潜在调节机制.
研究的目的:
- 调查N端乙化在调节Set1-COMPASS复合物的功能中的作用.
- 确定N端乙转移酶 (NATs) 如何影响H3K4甲基化模式.
- 确定NAT所针对的特定Set1-COMPASS子单位及其功能后果.
主要方法:
- 在酵母模型中删除NAT复合物 (NatA,NatB).
- 使用ChIP-seq.使用全球H3K4me3水平的分析.
- 评估H3K4me2在基因体和促进体之间的分布.
- 位点定向的突变发生阻断特定子单元 (Shg1) 的 N-终端乙化.
主要成果:
- 删除NatA导致全球H3K4me3大幅下降,H3K4me2峰值从转录区域转移到促进区域.
- NatA调解了Set1-COMPASS子单位Shg1,Spp1和Swd2.2的N端乙化过程.
- 干扰Shg1的N端乙化显著损害了H3K4的甲基化.
- NatB还影响H3K4甲基化,可能通过Swd1乙化.
结论:
- 通过NAT直接微调H3K4甲基化模式,对Set1-COMPASS蛋白质进行N端乙化.
- 对于建立正确的H3K4甲基化场景来说,Shg1的NatA介导的乙化是至关重要的.
- 这项研究揭示了一种新型的调节层,可以控制H3K4甲基化及其对基因表达的影响.
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