葡萄糖结合并激活NSUN2以促进翻译和表皮分化
Weili Miao1, Douglas F Porter1, Ya Li2
1Program in Epithelial Biology, Stanford University School of Medicine, 269 Campus Dr, Stanford, CA 94305, USA.
Nucleic acids research
|November 20, 2024
概括
细胞内葡萄糖的升高对于上皮细胞的分化至关重要. 葡萄糖直接结合并增强RNA结合蛋白NSUN2,通过调节信使RNA转化来增强其活性和促进分化.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 细胞内葡萄糖度对于上皮细胞分化至关重要.
- 葡萄糖在分化中的作用背后的精确分子机制尚未完全阐明.
- 已知葡萄糖可以结合蛋白质,改变它们的功能以促进分化.
研究的目的:
- 研究葡萄糖结合蛋白在上皮细胞分化中的作用.
- 为了确定参与表皮分化的新型葡萄糖结合蛋白.
- 阐明葡萄糖通过蛋白质相互作用增强分化的分子机制.
主要方法:
- 使用生物化学测试识别葡萄糖结合蛋白.
- 描述NSUN2 (NOP2/Sun RNA甲基转移酶2) 作为一种结合葡萄糖的蛋白质.
- 分析NSUN2的酶活性及其与S-adenosyl-L-methionine的相互作用.
- 研究NSUN2在信使RNA (mRNA) 翻译中的作用及其与与分化相关的mRNA相关的关系.
- 评估葡萄糖对NSUN2介导的mRNA修饰 (m5C) 和GRHL3.3等关键分化因子的表达的影响.
主要成果:
- NSUN2被确定为一种新型的葡萄糖结合蛋白,对表皮分化至关重要.
- 葡萄糖与NSUN2结合,增强了它对S-adenosyl-L-methionine的亲和力,增加了它的酶活性.
- 葡萄糖促进NSUN2与mRNA翻译机制的相互作用.
- NSUN2调节全球mRNA翻译,特别是增强了包括m5C修饰在内的GRHL3在内的亲差异化mRNA的翻译.
- 这些发现强调了葡萄糖在细胞分化中的非能量作用.
结论:
- 葡萄糖直接结合并激活RNA结合蛋白NSUN2,在表皮分化中发挥关键作用.
- NSUN2作为一个关键的调解者,将葡萄糖信号转化为mRNA翻译和修改的变化.
- 葡萄糖通过其代谢功能之外的多种分子机制促进细胞分化,涉及直接的蛋白质相互作用和基因表达的调制.
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