尼奇泰特保持生殖系干细胞独立于二氧化原酶活动
Renjun Tu1, Zhaohua Ping2, Jian Liu3
1Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong Special Administrative Region, China.
The EMBO journal
|March 19, 2024
概括
十一转位 (TET) 蛋白质在干细胞调节中起着新的作用. 作为一个支架蛋白质,独立于它的酶活性,控制生殖系干细胞的自我更新.
科学领域:
- 表观遗传学和基因调控
- 干细胞生物学 干细胞生物学
- 发展生物学 发展生物学
背景情况:
- 十一转位 (TET) 蛋白是已知的参与DNA和RNA修饰的二氧化原酶.
- 对于TET蛋白在成年干细胞调节中的作用,特别是对利基信号的作用,尚不清楚.
- 胚胎干细胞 (GSCs) 对于繁殖至关重要,并且依赖于利基支持进行自我更新.
研究的目的:
- 研究Drosophila生殖系干细胞 (GSC) 利基中的Tet蛋白的功能.
- 阐明 Tet 影响 GSC 自更新的机制.
- 为了确定Tet的功能是否取决于它的酶活性.
主要方法:
- 在Drosophila中进行基因操纵,以耗尽或表达GSC中的Tet及其突变物.
- 对Dpp (BMP同类物) 表达水平和BMP信号通路活性进行分析.
- 同免疫沉降和染色体免疫沉降测试以确定蛋白质相互作用和DNA结合部位.
主要成果:
- 蛋白激活GSC中的DPP表达,这对GSC自我更新至关重要.
- 的耗尽导致DPP产量下降和GSC过早损失.
- 野生类型和催化不活跃的Tet突变物都会挽救GSC损失和BMP信号缺陷,表明酶活性独立的作用.
结论:
- 的功能是作为一个支架蛋白在GSC的利基,独立于其二氧化酶活动.
- 泰特通过与Bap55和Stat92E的相互作用,促进了聚胺布拉姆相关蛋白 (PBAP) 复合物的向dpp增强剂的招募.
- 这种保存机制突出了TET蛋白在支持成年干细胞维护的利基信号传递方面发挥的新作用.
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