一个Huluwa酸化开关调节胚胎轴的诱导作用
1Department of Pediatric Surgery and Laboratory of Pediatric Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China.
Nature communications
|November 20, 2024
概括
胚胎轴的形成依赖于Huluwa (Hwa) 蛋白质. 在Ser168中酸化Hwa对于激活β-catenin信号和诱导脊椎动物体轴的激活至关重要.
科学领域:
- 发育生物学是发展生物学.
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 胚胎轴的形成对于脊椎动物的发育和模式形成至关重要.
- 背部组织者和母体衍生的Huluwa (Hwa) 蛋白质是关键的调节者.
- 此前,Hwa激活和调节的精确机制是未知的.
研究的目的:
- 为了阐明Huluwa (Hwa) 蛋白活性的调节机制.
- 为了确定参与Hwa介导轴感应的关键残留物和信号通路.
- 了解Hwa酸化在胚胎发育中的作用.
主要方法:
- 候选查以确定关键的Hwa突变.
- 生物化学测试以评估蛋白质结合和降解 (坦基拉酶1/2,素).
- 在体外和体外激酶测定和酸化研究.
- 创建 knock-in 的等位基因和抗体治疗.
主要成果:
- 在PPNSP基因中的Ser168突变取消了Hwa的轴诱导活性.
- 发现Ser168酸化可以增强Hwa活性和β-catenin信号传递.
- 多个激酶 (Cdk16,Cdk2,GSK3β) 被确定为Ser168酸化的调节者.
- 在 knock-in 胚胎中将 Ser168 转化为氨酸导致了身体轴的完全丧失.
结论:
- 素168 (Ser168) 酸化作为Huluwa (Hwa) 蛋白功能的关键开关.
- 对于胚胎轴诱导,Hwa/β-catenin信号传递受到Ser168的激酶介导酸化的严格调节.
- 这种酸化机制对于脊椎动物的胚胎发育和模式形成至关重要.
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