NIPA定义了一种SCF类型的哺乳动物E3结合酶,该结合酶调节了线粒体进入的过程
Florian Bassermann1, Christine von Klitzing, Silvia Münch
1Department of Internal Medicine III, Technical University of Munich, 81675 Munich, Germany.
Cell
|July 13, 2005
概括
ALK的核相互作用伙伴 (NIPA) 形成了控制细胞循环进展的E3结合酶复合体. 这个复合体针对核环林B1进行降解,防止过早进入线粒分裂.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 调节的蛋白质表达振荡对于细胞周期控制至关重要.
- SCF (Skp1-Cul1-F-box) E3无素连接酶向细胞循环蛋白质进行蛋白质酶体降解.
- SCF复合体的F盒蛋白子单元决定了基质的特异性.
研究的目的:
- 为了确定参与细胞循环调节的新型F-box蛋白质.
- 描述一个新发现的F-盒蛋白的功能,NIPA (ALK的核相互作用伙伴).
- 阐明SCF (NIPA) 在控制线粒体进入中的作用.
主要方法:
- 识别NIPA作为人类F-盒蛋白.
- 通过细胞循环依赖酸化对SCF (NIPA) 复杂组合和调节的表征.
- RNA干扰 (RNAi) 失活NIPA及其对循环蛋白B1局部化和细胞周期进展的影响的分析.
主要成果:
- NIPA形成一个SCF类型的E3酶,SCF (NIPA),它调节了线粒体的进入.
- NIPA酸化控制其无处不在的活性,将其限制在相间.
- 核环素B1是SCF ((NIPA) 的基质;NIPA的无活化导致核环素B1的积累,B1-Cdk1活性升高,以及过早的线粒分裂.
结论:
- SCF ((NIPA) 是一种新型的E3泛基因酶,其向核环林B1.1.
- 通过SCF (NIPA) 介导的全方位化调节了哺乳动物细胞循环中的S相完成和线粒细胞进入.
- 依赖酸化的NIPA调节确保了通过细胞循环的及时进展.
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