基因组防御能力的扩大使得能够控制不断扩大的介质驱动器
Peiwei Chen1, Katherine C Pan1, Eunice H Park1
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125.
概括
基因组防御途径通过沉默自私基因来保护完整性. 在Drosophila中,Trailblazer蛋白增强PIWI-clade核酶以控制扩展的恒星基因,保护生育能力.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 基因组防御途径,包括RNA干扰和染色体沉默,通过沉默自私的遗传元素来保护基因组完整性.
- 与PIWI相互作用的RNA (piRNA) 途径使用特异性因子 (piRNAs) 和效应因子 (PIWI-clade核酶) 来实现目标RNA沉默.
- 基因组防御中的适应性依赖于特异性因素创新,但其他类型的创新仍然不太了解.
研究的目的:
- 研究超越特异性因素的基因组防御中的新型创新机制.
- 确定控制Drosophila melanogaster*中最近扩展的自私基因的因素.
- 了解基因组的防御能力是如何升级的,以匹配不断扩大的自私基因元素.
主要方法:
- 进行了向RNA干扰 (RNAi) 选,以确定介质驱动基因*Stellate*的抑制剂.
- 识别和描述了转录因子Trailblazer的功能.
- 分析了Trailblazer在调节PIWI-clade核酶 (Aub和AGO3) 表达中的作用.
主要成果:
- 鉴定了开拓者作为一个关键的防御因素,对扩展 * 星* 基因.
- 一种转录因子Trailblazer可以提高PIWI-clade核酶Aub和AGO3.3的表达.
- 在Trailblazer的DNA结合领域的创新使其能够增加Aub和AGO3的表达,从而增加沉默能力.
结论:
- 一种新的防御策略涉及到基因组防御能力的升级,以量化匹配不断扩大的自私基因.
- 最近在Trailblazer的DNA结合领域的创新使得增强的PIWI-clade核酶表达能够控制*Stellate*.
- 增加防御能力是一种保存的进化策略,用于管理整个生命的自私遗传元素.
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