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在Xenopus发育过程中,Xbra调节左侧区域酸化Smad1的活性

Santosh Kumar^1,2, Zobia Umair¹, Vijay Kumar¹

¹Department of Biochemistry, Institute of Cell Differentiation and Aging, College of Medicine, Hallym University, Chuncheon, Gangwon-Do, 24252, Republic of Korea.

Scientific reports

|April 18, 2024

概括

纤维细胞生长因子 (Fgf) /细胞外信号调节激酶 (Erk) 信号传递促进了Xenopus胚胎中的侧面半皮形成. 它通过诱导Xbra来实现这一目标,该Xbra保护骨形态蛋白 (Bmp) /Smad1信号从降解中得到保护,确保正常发育.

科学领域:

发育生物学是发展生物学.
分子信号通道的分子信号通道.
胚胎发生是胚胎发生.

背景情况:

骨形态蛋白 (Bmp) /Smad1通路对于胚胎发育和组织维护至关重要.
线素激活蛋白激酶 (Mapk) /Erk信号可以通过酸化Smad1来抑制Bmp/Smad1,从而导致其降解.
纤维细胞生长因子 (Fgf) /Erk和Bmp/Smad1通路之间的相互作用是复杂的,有证据表明抑制和合作.

研究的目的:

阐明Fgf/Erk和Bmp/Smad1信号之间的合作相互作用的分子机制.
确定介导Fgf/Erk信号对Smad1.1的保护作用的因素.
了解这种相互作用在侧面半皮层特征中的作用.

主要方法:

研究了Xenopus胚胎中的Fgf/Erk和Bmp/Smad1通路之间的相互作用.
利用分子生物学技术识别Xbra作为一个关键的中间体.
使用生化和成像方法分析了蛋白质复合体形成 (Xbra/Smad1/Smad4) 和Smad1定位.
评估与中皮,神经和血液发育相关的基因表达变化.

主要成果:

通过Fgf/Erk信号诱导的Xbra被确定为Smad1.1的保护因子.
证明Xbra在物理上与化Smad1在其链接区域相互作用.
表明Xbra促进保护性Xbra/Smad1/Smad4三元复合物的形成,促进Smad1的核定位,并防止蛋白质体降解.
观察到持续的Smad1核定位,导致侧面半皮基因的上调和同时抑制神经和造血基因.

结论:

作为一个关键的环节,Xbra在Fgf/Erk和Bmp/Smad1信号通路之间进行合作互动.
这种依赖Xbra的机制对于Xenopus胚胎中侧面半皮的特征至关重要.
这些发现澄清了一条以前模糊的分子路径,该路径控制了发育信号交叉通话.

关键词:

这是Xenopus.Bmp4 在线播放在这里,我们可以看到Erk Erk Erk.Fgf 的意思是介质皮层的规格说明这是Smad1的意思.这就是Smad4mad.一个Xbrabra.

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