由Lin28b uORF编码的微蛋白PLUM是多能性和胚胎发育的细胞质决定因素
Zhihong Hao1,2,3,4, Yi Wu1, Yile Huang2
1Institute of Development and Regeneration, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangdong-Hong Kong Joint Laboratory for Stem Cell and Regenerative Medicine, GIBH-CUHK Joint Research Laboratory on Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, China-New Zealand Joint Laboratory on Biomedicine and Health, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China.
一种新型的微蛋白质PLUM通过整合RNA代谢和线粒体活动来调节多能性. 它的耗尽加速了先天性状态的获得,影响了早期发育和胚胎植入.
科学领域:
- 细胞可塑性和发育生物学.
- RNA生物学和基因调控.
- 代谢调节和线粒体功能.
背景情况:
- 翻译和新陈代谢之间的交叉对细胞可塑性至关重要.
- 非正规的开放阅读框架 (ORF) 在代谢调节和早期发育中的作用基本上是未知的.
- 规范翻译研究忽略了5'未翻译区域 (UTR) 等监管要素.
研究的目的:
- 调查非正典ORFs在代谢调节和早期发育中的功能.
- 确定涉及多能性和细胞可塑性的新型微蛋白.
- 阐明RNA转化影响代谢状态和发育时间的机制.
主要方法:
- 在Lin28b 5' UTR.中分析上游ORF (uORF) 转换.
- 微蛋白PLUM (与多能性相关的Lin28b uORF编码微蛋白) 的耗尽研究.
- 研究L1td1凝聚剂动态,mRNA稳定,P体组成和线粒体氧化酸化.
主要成果:
- 一个uORF在Lin28b 5' UTR中的选择性翻译产生了微蛋白PLUM.
- PLUM 枯竭会诱导决定性和同步的原始多能性,并导致胚胎植入缺陷.
- PLUM 损失改变了 L1td1 凝聚物的行为,增强了多能性 mRNA 的稳定性,破坏了 P-body,并增强了线粒体的氧化酸化.
结论:
- PLUM是一种新型的微蛋白,可以作为多能性决定因素.
- PLUM集成了RNA调节和代谢重塑,以控制原始状态的获得.
- 这项研究强调了uORF编码的微蛋白在早期发育和细胞可塑性中的关键作用.
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