在哺乳动物精子生成过程中,PIWI蛋白将piRNA生物发生机制与线粒体结合起来
Jie Gao1, Canmei Chen1, Guanyi Shang1
1Shanghai Key Laboratory of Maternal Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
在小鼠生殖细胞中,PIWI蛋白调节piRNA生物发生机制的组装和拆卸. 这涉及线粒体蛋白和piRNAs,确保适当的精子生成和基因调节.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- piRNA生物发生在哺乳动物生殖细胞的线粒体间凝固 (IMC) 中.
- 关于IMC组件与线粒体参与piRNA生物发生的机制尚不清楚.
- PIWI蛋白对于生殖线发育和基因组防御至关重要.
研究的目的:
- 阐明PIWI蛋白在编排piRNA生物发生机制组装和拆卸中的作用.
- 为了确定关键的蛋白质相互作用和调节piRNA生物发生动态的分子事件.
- 了解哺乳动物精子生成期间piRNA生物发生的时空调节.
主要方法:
- 同免疫沉测试以确定蛋白质相互作用.
- 免疫光显微镜可视化蛋白质定位和复杂形成.
- 在不同发育阶段的小鼠生殖细胞中分析基因表达和piRNA概况.
主要成果:
- ASZ1蛋白质将PIWIL2在IMC颗粒上,启动机器组装.
- 与PIWIL2结合的piRNA触发了ASZ1-PIWIL2解离,调节了这个过程.
- 在精子生成过程中,不同的PIWI蛋白复合体 (ASZ1-PIWIL2-TDRD1和TDRKH-PIWIL1-TDRD1) 进行合作.
- 通过TDRD1介导的相分离对于IMC组装和巴基piRNA生物生成至关重要.
- PIWI蛋白质作为分子桥梁,通过线粒体,将蛋白质连接到IMC.
结论:
- PIWI蛋白质是piRNA生物发生机制动态的中央调节者.
- 该研究揭示了一种涉及蛋白质招募,解离和相分离的顺序机制.
- 这些发现澄清了对哺乳动物精子生成至关重要的piRNA生物发生的时空控制.
更多相关视频
08:56In Situ Detection of Ribonucleoprotein Complex Assembly in the C. elegans Germline using Proximity Ligation Assay
Published on: May 5, 2020
10:31Enhanced Crosslinking Immunoprecipitation eCLIP Method for Efficient Identification of Protein-bound RNA in Mouse Testis
Published on: May 10, 2019
相关概念视频
piRNA - Piwi-interacting RNAs
Structure of Porins
Conservation of Protein Domains Over Different Proteins
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
RNA Interference
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Translocation of Proteins into the Mitochondria
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
Porin Insertion in the Outer Mitochondrial Membrane
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
