可转化元素推动F-box基因的监管和功能创新
Miguel Vasconcelos Almeida1,2, Zixin Li3, Pedro Rebelo-Guiomar1
1Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK.
Molecular biology and evolution
|April 25, 2025
概括
可转移的元素和病毒通过共享蛋白质域来促进基因组多样性. 这项研究揭示了F-box基因捕获可转移元素域的两个实例,创造了具有基因调节和生物特征作用的新型蛋白质.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 可转移元素 (TE) 和病毒可以通过域重组增加宿主基因组内的蛋白质多样性.
- F-box基因是参与蛋白质降解的泛素酶复合体的关键组成部分.
研究的目的:
- 通过真核基因识别可移植元素 (TE) 或病毒域捕获的实例.
- 研究从这种捕获中产生的新型蛋白质的功能整合和调节作用.
主要方法:
- 对1000万个真核蛋白进行大规模查,以确定同时出现的TE/病毒和宿主域.
- 含有Tc1/Mariner转移酶螺旋转 (HTH) 域的特定F盒基因 (例如,fbxa-215) 的功能特征.
- 使用热冲击因子1 (HSF-1) 结合试验对转录调节的分析.
- 使用AlphaFold2多分子预测的全蛋白质组相互作用研究.
主要成果:
- 在Caenorhabditis中被F-box基因捕获的Tc1/Mariner转移酶螺旋转 (HTH) 域被确定,形成了一个新的F-box基因类.
- 证明fbxa-215中的HTH域对于生殖粒的定位,生育和耐热性至关重要.
- 显示的HSF-1通过直接与上游Helitron TEs结合,将fbxa-215集成到热冲击反应中.
- 揭示了斑马鱼F-box基因对TE域的独立捕获.
- 相互作用组分析表明,含有HTH的F盒蛋白参与翻译后调节和蛋白质稳定.
结论:
- 确定了两个独立的TE域被F-box基因捕获的案例.
- 这些被捕获的域使F盒蛋白的基质特异性多样化,影响蛋白质静止.
- 新型F盒蛋白集成到宿主基因调节网络中,影响各种生物过程.
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