TRIP13定位在突触染色体上,并充当了微变的剂量敏感调节器
Jessica Y Chotiner1, N Adrian Leu1, Fang Yang1
1Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 19104, USA.
bioRxiv : the preprint server for biology
|October 9, 2023
概括
AAA+ ATPase TRIP13对于男性和女性的生育能力至关重要,通过重塑HORMA域蛋白来调节介质进展. 失去TRIP13会导致中介性停止和不育,这突显了它在染色体突触中的重要作用.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
- 生殖生物学 生殖生物学
背景情况:
- 介质性进展依赖于染色体突触和重组期间的蛋白质复杂动力学.
- 像HORMADs一样,HORMA域蛋白质是关键的调节者,与染色体轴相互作用.
- TRIP13 (AAA+ ATPase) 和它的正方体Pch2重塑HORMA域蛋白质.
研究的目的:
- 调查TRIP13在介质进展中的作用和局部化.
- 了解TRIP13丢失对染色体突触和生育能力的影响.
- 为了确定TRIP13的局部化是否依赖于其他介质蛋白.
主要方法:
- 在小鼠精子细胞中进行免疫定位研究.
- 对Trip13-null和异卵性小鼠的分析.
- 产生带有标记TRIP13蛋白质的Knockin小鼠.
主要成果:
- TRIP13局部化到合的突触膜复合体 (SC) 和端粒在半变化过程中I.
- 失去TRIP13会导致中介性停止,不育,以及SC上异常的HORMAD持久性.
- 在Trip13-null小鼠中观察到染色体异位,特别是影响XY染色体和中心区域.
- TRIP13剂量会影响介质忠实性,异卵性小鼠表现出较轻微的缺陷.
- 对SC的TRIP13定位是独立于轴元素蛋白的 (REC8,SYCP2/3).
结论:
- TRIP13对于生育能力和两性中适当的介质进展至关重要.
- TRIP13对突触SC的局部化对于调节HORMA域蛋白质解离至关重要.
- TRIP13作为一种对剂量敏感的变调节剂,对于解决染色体突触问题至关重要.
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