ACD15,ACD21和SLN调节MBD6的积累和流动性,以沉默基因和可移植元素
Brandon A Boone1,2,3, Lucia Ichino1,2,3, Shuya Wang1,2
1Molecular Biology Institute, University of California Los Angeles, Los Angeles, CA 90095, USA.
bioRxiv : the preprint server for biology
|September 4, 2023
概括
新的蛋白质ACD15和ACD21是基因沉默的关键,因为它们有助于形成大型,动态的DNA甲基化复合体. 这些发现揭示了表观遗传调节中的新机制.
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
- 植物科学 植物科学
背景情况:
- 基因甲基化对于沉默可转移元素和基因至关重要.
- 阿拉比多普西斯的MBD5/6复合体,包括MBD5,MBD6和SILENZIO (SLN),调解了这种沉默.
- 这种复杂的精确组成和组装尚未完全理解.
研究的目的:
- 描述ACD15和ACD21在MBD5/6静音复合体中的作用.
- 调查这些蛋白质如何促进异色染色的形成和动态.
- 了解驱动高阶复杂组合和核体形成的机制.
主要方法:
- 对ACD15和ACD21的生物化学表征.
- 在缺乏ACD的Arabidopsis突变体中对基因沉默的分析15/21.
- 同免疫沉测试以确定蛋白质相互作用.
- 活细胞成像和FRAP用于研究复杂的动态.
- CRISPR-dCas9系统用于针对性地招募复杂组件.
主要成果:
- ACD15和ACD21对于基因沉默和桥梁SILENZIO到MBD5/6复合体至关重要.
- 这些蛋白质促进了 heterochromatin 中的 MBD5/6 复合物的多元化.
- 复杂的移动性是由SILENZIO活动规范的.
- 将ACD15/21与子宫外部位结合,导致MBD5/6复合体积聚到核体中.
结论:
- ACD15和ACD21是DNA甲基化介导基因沉默复合物的关键组成部分.
- 它们驱动高阶,动态蛋白质组合的形成,这对于异性染色素至关重要.
- 这些发现为表观遗传静音机制的结构组织和调节提供了新的见解.
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