核膜相位分离策划了植物中压力诱导的转录反应
Yu Tang1, Xiao Liu2, Yiling Fang3
1Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720, USA; State Key Laboratory of Wheat Improvement, Peking University Institute of Advanced Agricultural Sciences, Shandong Laboratory of Advanced Agricultural Sciences in Weifang, Shandong 261325, China.
Developmental cell
|August 8, 2025
概括
植物核膜转介膜2 (PNET2) 通过核膜中的相分离将转录因子隔离起来. 压力释放这些因素,激活基因表达,揭示了一种新的植物调节机制.
科学领域:
- 植物分子生物学 植物分子生物学
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 核膜 (NL) 组织染色质并调节基因表达.
- 由于缺少动物蛋白质,对植物NL依赖的基因调节的了解很少.
- 内核膜 (INM) 蛋白质在核组织中起着关键作用.
研究的目的:
- 研究植物INM蛋白PNET2在核板介导基因调节中的作用.
- 阐明PNET2控制转录因子的机制.
- 了解环境压力如何影响这一监管途径.
主要方法:
- 蛋白相互作用研究以确定PNET2结合伙伴.
- 液-液相分离试验用于研究分隔.
- 在不同的PNET2表达和压力条件下分析NTL转录因子活性.
主要成果:
- 通过无序的区域,PNET2与膜结合的NAC转录因子 (NTLs) 相互作用.
- PNET2促进PNET2-NTL在核层中的液态液态相分离,隔离NTLs.
- 缺少PNET2导致NTL放松调节和自发的应激反应.
- 压力刺激会破坏PNET2-NTL相分离,释放NTL用于基因激活.
结论:
- PNET2 在核电站的核膜中充当相隔离枢纽.
- 这种机制调节了膜结合的转录因子活性,以应对环境线索.
- 研究结果揭示了一种新的基因表达控制层,这种基因表达控制层在植物中介于相位分离.
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