长非编码RNA中的适应性P元素插入与独特的沉默特性有关
Savana Hadjipanteli1,2, Natalie Copeland1, Nancy Marmolejo Bustamante1
1Department of Biology and Biochemistry, University of Houston, Houston, TX 77204.
bioRxiv : the preprint server for biology
|August 12, 2025
概括
在Drosophila melanogaster中CR43651长非编码RNA中的自适应性P元素转位子插入增强了piRNA类似的沉默,但导致活力缺陷. 这些插入物通过抑制P元素提供了健康益处,尽管对宿主健康有负面影响.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 可移植元素 (TE) 是可引起突变的移动基因序列.
- 虽然经常有害,但TE插入可以是适应性的,影响宿主基因表达或功能.
- 已知piRNA集群调解TE沉默,但其他基因组区域也可以发挥作用.
研究的目的:
- 研究Drosophila melanogaster中CR43651长非编码RNA (lncRNA) 中P元素插入的功能后果.
- 确定这些插入对P元素转录调节,piRNA生物发生和宿主活力的影响.
- 阐明与这些TE插入相关的适应机制和潜在的权衡.
主要方法:
- 在CR43651 lncRNA位点内对P元素插入的分析.
- 在 oogenesis 期间评估 piRNA 生产和沉默.
- 在存在CR43651插入的情况下,对宿主生存能力和健康状况的评估.
- 检查微RNA (miRNA) 生产,特别是 mir14.
主要成果:
- CR43651是P元素的插入热点,有助于适应性的好处.
- 在CR43651中插入P元素的反意义增强了在P元素转移的关键时期 oogenesis期间的piRNA-like沉默.
- 尽管有沉声效益,但这些插入显示出衰退的可行性效应,可能与中断的mir14生产有关.
结论:
- 虽然CR43651不是正规的piRNA集群,但它可以调解自适应性TE沉默.
- 在CR43651中P元素插入通过增强的转换抑制提供了健身优势.
- 这些插入导致mir14生产的中断导致了权衡,影响了宿主生存能力.
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