MafB是Ets-1的相互作用伙伴和抑制剂,可以抑制红状腺分化
M H Sieweke1, H Tekotte, J Frampton
1European Molecular Biology Laboratory, Heidelberg, Federal Republic of Germany.
Cell
|April 5, 1996
概括
转录因子 MafB 与 Ets-1 直接相互作用,抑制了 Ets-1 的发生.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- Ets-1是一种转录因子,对细胞分化至关重要.
- 像蛋白质一样的AP-1通过蛋白质-蛋白质相互作用来调节基因表达.
- 骨髓单细胞和红细胞是血液形成中的关键细胞类型.
研究的目的:
- 为了确定 Ets-1 转录因子的直接相互作用伙伴.
- 研究MafB和Ets-1相互作用对基因调节和细胞分化的功能后果.
主要方法:
- 酵母的一种混合屏用于识别Ets-1相互作用蛋白.
- 共同免疫沉和域映射以确认蛋白质相互作用.
- 记者基因测定用于评估转录抑制.
- 在红细胞细胞系中进行过度表达研究,以评估对基因表达和分化的影响.
主要成果:
- MafB是一种类似AP-1的蛋白质,被确定为Ets-1的直接结合伙伴.
- MafB通过其基本或leucine-zipper区域与Ets-1的DNA结合域结合.
- MafB抑制了Ets-1介导的Ets结合部位和转移素受体基因的交换活化.
- 过度表达MafB通过降低调节转移素受体而抑制红细胞分化,而不会影响增殖.
结论:
- MafB作为Ets-1活动的负调节剂.
- MafB和Ets-1之间的相互作用在血液形成过程中调节谱系特异性基因表达方面发挥着关键作用.
- 转录因子之间的抑制相互作用对于控制细胞分化途径至关重要.
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