E3 Ubiquitin Ligase Trip12在造血干细胞发育过程中减弱了Wnt9a/Fzd9b信号传递
Jessica Ensing1, Amber D Ide1, Carla Gilliland1
1Department of Cell Biology, Van Andel Institute, Grand Rapids, Michigan, 49503, USA RRID: SCR_021956.
bioRxiv : the preprint server for biology
|November 1, 2024
概括
甲状腺激素受体相互作用体12 (Trip12) 针对Frizzled 9b (Fzd9b) 进行降解,调节Wnt9a/Fzd9b信号传输. 这种机制控制了斑马鱼的造血干细胞增殖.
科学领域:
- 分子生物学分子生物学
- 发育生物学是发展生物学.
- 细胞信号传递 细胞信号传递
背景情况:
- Wnt信号传递对于发育和恒常状态至关重要,特别是在造血干细胞中.
- 调节 Wnt 信号的失调可能导致瘤发生.
- 特定的Wnt配体和Frizzled (Fzd) 受体相互作用及其调节尚未完全理解.
研究的目的:
- 阐明调节Wnt9a/Fzd9b信号传输的分子机制.
- 为了确定Wnt9a/Fzd9b信号是如何关闭的.
- 了解特定的E3泛素酶在Fzd受体调节中的作用.
主要方法:
- 在Fzd9b调控中研究了E3泛基因酶Trip12在Fzd9b调控中的作用.
- 利用斑马鱼模型研究血造干细胞的增殖.
- 分析了Fzd9b和随后的 lysosomal 降解途径上的 ubiquitination 位点.
主要成果:
- 确定Trip12对于Fzd9b在其第三个细胞内循环中的K437的无处不在至关重要.
- 证明Trip12选择性地针对Fzd9b进行 lysosomal 降解.
- 表明Trip12介导的降解降低了Fzd9b的可用性,影响了Wnt9a/Fzd9b的信号传递和造血干细胞的增殖.
结论:
- 通过Trip12介导的Fzd9b的无处不在和降解是关闭Wnt9a/Fzd9b信号的特定机制.
- 这种调节对于控制造血干细胞增殖至关重要.
- 了解Fzd受体丰度调节是开发向疗法的关键.
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