核孔复合体的全面成熟调节了胚胎基因组的激活
Weimin Shen1, Bo Gong1, Cencan Xing1
1Laboratory of Molecular Developmental Biology, State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China.
Cell
|December 9, 2022
概括
综合性核毛孔复合体 (NPC) 成熟性作为斑马鱼胚胎中胚胎基因组激活 (ZGA) 的分子定时器. 增加的NPC组装增强了母体转录因子的核传输,控制了早期发育中的ZGA.
科学领域:
- 细胞生物学
- 发育生物学
- 遗传学
背景情况:
- 核孔复合体 (NPC) 介导核细胞质运输,对细胞功能至关重要.
- 在早期脊椎动物胚胎发生过程中,NPC组成,结构和透性的动态变化尚不清楚.
- 在调节胚胎发育,特别是胚胎基因组激活 (ZGA) 中NPCs的作用需要进一步研究.
研究的目的:
- 研究斑马鱼早期胚胎发育过程中核毛孔复合体 (NPC) 成熟的动态变化.
- 确定NPC成熟度在控制细胞基因组激活 (ZGA) 的作用.
- 阐明NPCs调节母体转录因子核进口和ZGA的机制.
主要方法:
- 在斑马鱼的发育过程中对核素招募和NPC组装的定量分析.
- 与NPC成熟度相关的母体转录因子核传输效率的评估.
- 对关键NPC成分 (Nup133,Ahctf1/Elys) 的基因操纵 (缺乏和过度表达),以研究它们对NPC组装,核运输和ZGA的影响.
主要成果:
- 由于斑马鱼在胚胎形成过程中增强了核素的招募,NPC的尺寸和复杂性逐渐增加.
- 综合性NPC成熟度 (CNM) 与母体转录因子核进口的效率有正相关性.
- 对NPC组合的损害 (Nup133或Ahctf1/Elys缺乏) 会延迟ZGA的发生,而Nup133过度表达则会加速它.
结论:
- 综合性NPC成熟度 (CNM) 作为一个关键的分子定时器,调节斑马鱼中ZGA的启动.
- 通过调节母体转录因子的核运输,NPCs控制ZGA,该转录因子必须达到特定的核度才能触发ZGA.
- 在早期胚胎发育过程中,NPC的动态成熟对于协调母体因子核积累和随后的胚胎基因激活至关重要.
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