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对于Wnt配体的分泌,需要Evi,一种保存的跨膜蛋白质
Kerstin Bartscherer1, Nadège Pelte, Dierk Ingelfinger
1German Cancer Research Center, Boveri-Group Signaling and Functional Genomics, Im Neuenheimer Feld 580, 69120 Heidelberg, Germany.
Cell
|May 9, 2006
概括
连续性中断 (Evi/Wls) 是一种对Wnt分泌至关重要的跨膜蛋白. 它的耗尽破坏了Wnt信号传递,突出了它在释放这些必不可少的信号分子中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学是发展生物学.
- 分子遗传学 分子遗传学
背景情况:
- Wnt信号通路调节发育和疾病中的关键生物过程.
- Wnt蛋白质是分泌的信号分子,在短距离和长距离之间起作用.
- Wnt蛋白释放和分泌因子的机制在很大程度上是未知的.
研究的目的:
- 确定涉及无翼 (Wg) 的分泌的跨膜蛋白质,这是Wnt.的Drosophila同类物.
- 阐明Evenness中断 (Evi/Wls) 在Wnt分泌和信号传递中的作用.
主要方法:
- 在Drosophila Wg信号传递中检测跨膜蛋白的RNA干扰 (RNAi) 选.
- 对进基突变物发育模式缺陷的分析.
- 经验实验和克隆分析.
- 在人类细胞中耗尽人类Wls同类物来评估保存的功能.
主要成果:
- 鉴定了一种保存的多通道跨膜蛋白,即Evenness中断 (Evi/Wls).
- 艾维突变体表现出发育模式缺陷和失败的Wg目标基因表达.
- 人类Wls的枯竭破坏了人体细胞中的Wnt信号,证实了进化保护.
- Evi/Wls 在产生Wg的细胞内起作用,在突变细胞中保留Wg.
结论:
- Evi/Wls对于Wg/Wnt蛋白质的分泌是必不可少的.
- Evi/Wls是第一个被确定为Wnt分泌所需的基因家族的成员.
- 了解Evi/Wls的功能,可以了解Wnt分泌机制,这些机制对发育和疾病至关重要.
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