斑马鱼在相分离凝聚物中的RNA分子的空间组织和功能由Dnd1控制
Kim Joana Westerich1, Katsiaryna Tarbashevich1, Jan Schick1
1Institute of Cell Biology, Center for Molecular Biology of Inflammation, University of Münster, 48149 Münster, Germany.
Developmental cell
|July 18, 2023
概括
斑马鱼的胚胎颗粒组织RNA和蛋白质,用于胚胎细胞的发育. 它们的空间布局受翻译和Dnd1蛋白质的影响,对于维持生殖细胞命运和全能性至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 分子遗传学 分子遗传学
背景情况:
- 胚胎颗粒是胚胎发展必不可少的器官,由分相RNA和蛋白质组成.
- 细菌颗粒内的精确空间组织及其在细菌细胞命运决定中的作用仍然不完全理解.
研究的目的:
- 为了研究斑马鱼胚胎颗粒中的分子的动态空间组织.
- 阐明这种组织对生殖细胞命运和全能性的功能相关性.
主要方法:
- 在斑马鱼中利用三维体内结构和功能分析.
- 在各种条件下检查了胚胎颗粒内的RNA和蛋白质的局部化,包括抑制翻译和Dnd1蛋白缺失.
主要成果:
- 将RNA定位到胚芽颗粒的外围,靠近核糖体,取决于活性翻译.
- 脊椎动物特有的死结 (Dnd1) 蛋白质对于在颗粒外围的 nanos3 RNA 定位至关重要.
- 翻译抑制或Dnd1缺失导致纳米3RNA移动到颗粒内部,与生殖细胞命运损失相关.
结论:
- 亚粒体的细分对于胚芽粒体内的转录后控制至关重要.
- 胚胎颗粒中的分子适当的空间组织对于保持胚胎细胞的全能性和命运至关重要.
相关概念视频
02:26Conservation of Protein Domains Over Different Proteins
10.9K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.9K
02:32Position-effect Variegation
6.4K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
6.4K