GASZ直接将MILI招募到线粒体间的水泥中,用于piRNA生物发生和男性生殖细胞发育
Junru Miao1, Zhaoran Zhang1, Duong Nguyen1
1Department of Animal Sciences, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI48824, United States.
Nucleic acids research
|October 9, 2025
概括
胚胎细胞使用piRNAs来抑制转体子并保持DNA完整性. GASZ蛋白向线粒体招募MILI,这对于piRNA生产和适当的精子发育至关重要.
科学领域:
- 生殖生物学 生殖生物学
- 分子遗传学 分子遗传学
- 细胞生物学 细胞生物学
背景情况:
- 生殖系基因组完整性受到抑制可转移元素的piRNAs的保护.
- piRNA生物发生在线粒体间 (IMC) 中,需要像MILI这样的RNA结合蛋白.
- MILI缺乏线粒体定位信号,因此需要与其他蛋白质相互作用以实现IMC功能.
研究的目的:
- 在IMC中识别与MILI相互作用的蛋白质.
- 研究GASZ-MILI相互作用在piRNA生物发生和精子发生中的作用.
主要方法:
- 蛋白质与蛋白质相互作用研究,以确定GASZ作为MILI合作伙伴.
- 在GASZ-MILI相互作用中断模型中分析piRNA水平,转子子表达和生殖细胞发育.
- 在成年小鼠中评估精子生成,GASZ-MILI相互作用中断.
主要成果:
- 在IMC中,GASZ被确定为一个重要的MILI互动合作伙伴.
- GASZ直接招募MILI到IMC进行piRNA生物发生.
- 在胚胎生殖细胞中破坏GASZ-MILI相互作用降低了piRNA水平,增加了转子子表达,并影响了早期的精子生成.
- 在成年小鼠中破坏GASZ-MILI相互作用显著损害了精子生成,影响了精子细胞和精子的形成.
结论:
- GASZ对于招募MILI到IMC至关重要,促进piRNA生物发生.
- GASZ-MILI相互作用对于维持生殖线DNA完整性和整个生命中适当的精子生成至关重要.
- 这种相互作用突出了构建piRNA机制以保护胚胎细胞发育的关键机制.
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