对于维持Arabidopsis中压制性染色质修饰的维持,TONSOKU是必要的
Lin Wang1, Mande Xue1, Huairen Zhang2
1State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, The Innovative Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Cell reports
|July 2, 2023
概括
植物TONSOKU (TSK) 蛋白质对于在DNA复制后维持抑制色素状态至关重要. 通过将染色质修饰剂招募到新形成的DNA中,TSK确保了基因组的稳定性,即使它不需要用于基因素积累.
科学领域:
- 遗传学 遗传学 是一个
- 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
背景情况:
- 细胞基因组的稳定性取决于DNA复制和染色质状态的维持.
- 植物TONSOKU (TSK) 和动物TONSOKU类 (TONSL) 蛋白质读取新的基因素,并帮助DNA在复制后的染色质中修复.
- TSK/TONSL在维持染色质状态中的作用尚不清楚.
研究的目的:
- 调查植物TONSOKU (TSK) 在DNA复制期间和之后维持染色质状态的功能.
- 确定TSK是否参与调节特定的抑制性染色质修饰.
主要方法:
- 分析TSK在基因组和核细胞积累中的作用.
- 评估TSK对抑制色素标记的影响 (H3K9me2,H2A.W,H3K27me3,DNA甲基化).
- 同免疫沉测试以确定TSK相互作用蛋白质.
- 对TSK与Polycomb路径突变物结合的基因分析.
主要成果:
- TSK对于全球基因组或核细胞组积累来说并不重要.
- TSK对于维持压制性染色体修饰,如H3K9me2,H2A.W,H3K27me3和DNA甲基化至关重要.
- TSK与H3K9甲基转移酶和Polycomb蛋白质进行物理相互作用.
- TSK突变加剧了Polycomb路径突变的缺陷,表明存在功能联系.
结论:
- TSK在维护抑制色素状态,特别是H3K9me2,H2A.W,H3K27me3和DNA甲基化方面发挥着至关重要的作用.
- TSK通过促进在狭窄的复制后窗口内向新生染色质招募必要的染色质修饰剂来起作用.
- 这种TSK的功能对整个真核生物基因组的稳定性和完整性至关重要.
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