mCRY1和mCRY2是昼夜时钟反循环负极的重要组成部分
1Laboratory of Developmental Chronobiology, Pediatric Service, Massachusetts General Hospital and Harvard Medical School, Boston 02114, USA.
Cell
|July 31, 1999
概括
鼠标加密染色 (mCRY) 蛋白mCry1和mCry2是昼夜时钟的关键组成部分. 这些蛋白质通过抑制CLOCK:BMAL1转录复合体来调节基因表达,在负反循环中起作用.
科学领域:
- * 分子生物学 * 分子生物学
- * * 时间生物学
- * 遗传学 遗传学是一门学科
背景情况:
- * 昼夜时钟调节了每天的生物节奏.
- *核心时钟机制涉及转录-翻译反循环.
- * 这些循环中的特定时钟组件 (如加密染色体) 的作用需要阐明.
研究的目的:
- * 确定鼠标密码色基因 (mCry1和mCry2) 在昼夜时钟中的功能.
- * 研究mCRY蛋白与mPER蛋白的相互作用及其对CLOCK:BMAL1转录的影响.
主要方法:
- * 对钟表/钟表突变小鼠mCry1和mCry2RNA水平的分析.
- *对mCRY1和mCRY2蛋白的细胞局部化研究.
- *共免疫沉试验用于研究蛋白质相互作用.
- * 路西法酶记者基因测定以评估转录抑制.
主要成果:
- * 在钟表/钟表突变小鼠中,mCry1和mCry2RNA水平降低.
- *mCRY1和mCRY2是与mPER蛋白相互作用的核蛋白.
- *mCRY1和mCRY2将mPER蛋白从细胞质转移到细胞核.
- *单独使用mCRY1或mCRY2可以抑制CLOCK:BMAL1介导的转录.
- *mPER和mCRY蛋白差异性抑制转录复合体.
结论:
- * 鼠标的密码染色体mCry1和mCry2在昼夜时钟反循环的负极中起作用.
- *mCRY蛋白对于mPER蛋白的核定位和抑制CLOCK:BMAL1转录至关重要.
- *mPER和mCRY蛋白质的差异抑制表明时钟内部存在复杂的调节机制.
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