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特定的EGF重复的Notch与Delta和Serrate之间的相互作用:对Notch作为多功能受体的含义
I Rebay1, R J Fleming, R G Fehon
1Howard Hughes Medical Institute, Department of Cell Biology, Yale University, New Haven, Connecticut 06511.
诺奇和德尔塔蛋白通过特定的EGF重复相互作用,重复11和12对于这种细胞通信至关重要. 这种结合功能是保存的,并且还调解了Notch与Serrate的相互作用.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 诺奇和德尔塔是涉及细胞间通信的跨膜蛋白.
- 它们对EGF同源蛋白进行编码,并在细胞表面相互作用.
- 在Notch-Delta相互作用中EGF重复的作用尚未完全理解.
研究的目的:
- 为了研究特定的EGF重复的Notch负责调解与Delta的相互作用.
- 为了确定这种结合功能是否保留在其他物种中.
- 探索Notch与其他类似蛋白质的相互作用,例如Serrate.
主要方法:
- 在Notch.的细胞外域的广泛删除突变发生.
- 在体外相互作用测试测试Notch和Delta/Serrate之间的结合.
- 使用Xenopus Notch同类的比较分析.
主要成果:
- 只有Notch的EGF重复11和12是必要的和足够的Delta结合.
- 这种结合能力在相应的Xenopus Notch同类的重复中得到保留.
- 诺奇还通过相同的两个EGF重复与Serrate相互作用,这表明它是一个多功能受体.
结论:
- 口EGF重复11和12形成了一个保留域,用于绑定Delta和Serrate.
- 口功能作为一个多功能受体,具有离散的联体结合单元.
- 这些发现提供了关于细胞在发育过程中的细胞通信的分子机制的见解.
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