通过线粒体支架对PIWI细分的时空控制定义了帕奇丁piRNA路径组织
Xiaoyuan Yan1,2, Chao Wei1,2, Jeffrey M Mann1
1Department of Animal Science, Michigan State University, East Lansing, MI 48824, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
线粒体因子对于男性生殖细胞中帕奇基尼piRNA生物生成至关重要. 丢失ASZ1会扰乱PIWI蛋白的流通,导致了 mitochondrial 间凝固形成的失败,并减少了piRNAs,但LINE1沉默仍然存在.
科学领域:
- 生殖生物学 生殖生物学
- 分子遗传学 分子遗传学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 帕奇丁piRNAs (PIWI相互作用RNAs) 对于生殖线完整性至关重要,但人们对其了解甚少.
- 它们的生物发生发生在胚胎颗粒 (介质粒体水泥,IMC) 附近的线粒体在雄性半导体过程中.
- 进入IMC和离开IMC的PIWI蛋白质贩运机制仍然不清楚.
研究的目的:
- 为了研究线粒体因子在帕奇丁piRNA生物发生中的作用.
- 为了阐明线粒体蛋白如何调节PIWI蛋白 (MILI,MIWI) 贩运用于piRNA生产.
- 了解IMC形成与帕奇皮RNA功能之间的联系.
主要方法:
- 使用小鼠模型,在变化过程中对线粒体支架蛋白ASZ1发生遗传破坏.
- 分析了PIWI蛋白位址和帕奇丁piRNA水平.
- 研究的LINE1转位子沉默.
- 有特征的染色体前体和IMC形成.
主要成果:
- 鉴定出不同的线粒体膜蛋白调解MILI和MIWI招募.
- 缺少ASZ1会破坏IMC的形成,MILI/MIWI的调节错误,以及帕奇基基piRNA的产生.
- 尽管严重的帕奇丁piRNA耗尽,LINE1转子体沉默仍然不受影响.
- 描述了三种类型的帕奇丁piRNA路径组件.
结论:
- 线粒体支架蛋白ASZ1对于帕奇基尼piRNA生物发生和IMC形成至关重要.
- 染色体前体作为PIWI-piRNA复合体积累的中心.
- 建立了基于IMC的生物发生和下游piRNA路径功能之间的联系.
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