通过NF-IL6 / LAP进行交易激活是通过其激活域的酸化来增强的
C Trautwein1, C Caelles, P van der Geer
1Department of Medicine, University of California, San Diego.
Nature
|August 5, 1993
概括
核因子-IL6 / 肝脏相关蛋白 (NF-IL6 / LAP) 调节急性期反应. 蛋白激酶C通路的刺激通过Ser 105酸化增强了NF-IL6/LAP的转录疗效.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 基因规则 基因规则
背景情况:
- NF-IL6/LAP (C/EBPβ) 是一个bZIP转录因子,对肝细胞核的急性阶段反应至关重要.
- 它是由IL-6,IL-1和脂聚糖类等炎症媒介诱导的,并调节IL-6促进剂活性.
- 控制NF-IL6/LAP表达和活动的精确控制机制仍然不完全理解.
研究的目的:
- 阐明调节NF-IL6/LAP活动的信号通路.
- 研究蛋白激酶C (PKC) 在调节NF-IL6/LAP功能中的作用.
- 为了确定NF-IL6 / LAP上影响其转录活性的特定酸化位.
主要方法:
- 利用基于细胞的测试来研究NF-IL6/LAP活性.
- 使用特定激活剂刺激蛋白激酶C通路.
- 进行了局部定向的突变发生,以调查Ser 105酸化的作用.
- 评估了NF-IL6/LAP目标基因的转录激活.
主要成果:
- 证明了蛋白激酶C通路的刺激会增加NF-IL6/LAP在Ser 105.5的酸化.
- 表明激活域内Ser 105的酸化增强了NF-IL6 / LAP的转录疗效.
- 确定了NF-IL6/LAP活动的新型监管机制.
结论:
- 蛋白质激酶C介导的Ser 105酸化是增强NF-IL6/LAP转录活性的一个关键机制.
- 这一发现为急性期反应的复杂调节提供了新的见解.
- 对这种信号通路的进一步研究可能会揭示炎症疾病的治疗点.
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