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通过保护相互作用的转录调节剂控制植物干细胞功能
Yun Zhou1, Xing Liu1, Eric M Engstrom2
1Division of Biology, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA.
Nature
|November 4, 2014
概括
毛发的梅里系统 (HAM) 家族作为WUSCHEL (WUS) /WOX蛋白的辅因子,对于维持植物干细胞所必不可少. 这一发现揭示了了解植物干细胞生产的新框架.
科学领域:
- 植物发育生物学植物发育生物学
- 分子遗传学 分子遗传学
- 干细胞研究的研究.
背景情况:
- 芽和根的植物干细胞对于发育至关重要.
- WUSCHEL (WUS) 和WOX蛋白调节干细胞群中的干细胞群.
- 控制干细胞中的WUS/WOX功能的遗传机制以前尚不清楚.
研究的目的:
- 研究植物干细胞中WUS/WOX蛋白的分子相互作用和遗传调节.
- 确定涉及维护干细胞身份和增殖的新型因素.
- 为了解植物的干细胞控制建立一个新的框架.
主要方法:
- 在Arabidopsis.中研究了毛 (HAM) 家族在Arabidopsis.中扮演的角色.
- 分析了HAM和WUS/WOX蛋白之间的物理相互作用.
- 在体内研究了WOX和HAM家族成员的下游共享的转录目标和表达模式.
主要成果:
- 转录调节剂的HAM家族作为WUS/WOX蛋白质的保存辅因子.
- HAM和WUS在物理上相互作用,并共享共同的体内标,推动下游基因表达和干细胞增殖.
- WOX和HAM家族成员的重叠表达决定了多样化的干细胞利基形成,HAM对所有细胞都至关重要.
结论:
- HAM家族对于所有植物干细胞的形成和维护至关重要.
- 这项研究为了解WUS/WOX蛋白如何在植物发育过程中控制干细胞的产生建立了新的框架.
- 鉴定出一种在不同植物大系统中 WUS/WOX 功能的基础上存在的保护性辅因子机制.
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