大脑水素素是内分体成熟和隙受体贩运所必需的
1Cancer and Developmental Biology Laboratory, National Cancer Institute, 1050 Boyles Street, Building 560, Room 22-12, Frederick, MD 21701, USA.
Cell
|May 31, 2008
概括
大脑 (bib) 基因,一种水素素,对Drosophila.的内分体成熟和酸化至关重要. 缺少它会扰乱内体的运输,影响神经系统发育过程中的Notch信号传递.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 众所周知,大脑 (bib) 基因对Drosophila神经系统发育中的Notch信号产生影响.
- 水素主要是因为它们在膜间的水运输中的作用而被认可.
研究的目的:
- 为了研究大脑 (bib) 基因在内分体成熟和贩运中的功能.
- 阐明Bib在调节内体酸性化中的作用及其对Notch信号传递的影响.
主要方法:
- 使用Drosophila melanogaster作为一个模型生物.
- 采用了双突变和其他内体体贩运突变的基因分析.
- 使用显微镜和生物化学测试观察了内体形态和酸化.
主要成果:
- 证明Bib对于Drosophila上皮细胞中的内分体成熟和酸化至关重要.
- 表明,Bib的损失导致早期的内分泌体聚合,并损害了像Notch.这样的信号分子的贩运.
- 建立了内体酸性化和Notch信号水平之间的相关性.
结论:
- 揭示了水素素 (Bib) 在内分体成熟,贩运和酸性化中的新角色.
- 突出了内体酸性化在调节Notch信号通路中的重要性.
- 鉴定Bib作为一个关键调节器的内细胞区生物发生在晚期内体形成之前.
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03:14Notch Signaling Pathway
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The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
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