蛋白序列进化是细胞命运决定性的物种间不相容性的基础
Emily L Rivard1, John R Srouji1,2, Anastasia Repouliou1
1Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, USA.
bioRxiv : the preprint server for biology
|August 6, 2025
概括
奥斯卡尔基因的进化过程
科学领域:
- 进化发育生物学 进化发育生物学
- 分子进化的分子进化.
- 基因组学就是基因组学.
背景情况:
- 新的基因迅速进化并集成到保存的网络中,影响发展.
- 了解序列变异对蛋白质功能的影响,需要研究正义基因和保存基因.
- 奥斯卡基因对生殖细胞的特异性和果的胚胎模式至关重要.
研究的目的:
- 调查奥斯卡的蛋白质编码序列进化如何导致Drosophila melanogaster和Drosophila virilis之间功能不兼容.
- 确定负责这种跨物种功能不兼容性的特定蛋白质域.
主要方法:
- 生成了模拟的奥斯卡尔版本,结合了D. melanogaster和D. virilis的域名.
- 在D. melanogaster.中表达了嵌合式奥斯卡尔序列.
- 量化了仿真人奥斯卡尔组装胚胎等离子体和指定胚胎轴的能力.
主要成果:
- D. virilis Oskar的OSK域主要负责跨物种不相容.
- 带有D. virilis OSK域的嵌合体未能产生原始生殖细胞,但指定了前后轴.
- D. virilis OSK域对D. melanogaster Oskar的胚胎等离子体局部表现出主导负面影响,导致模式缺陷.
结论:
- 在OSK域的生物物理性质中发生的变化可能会与保存的胚胎等离子体分子进行明显的分子相互作用.
- 一个重要的生殖系决定因素在5000万年内变得与物种不相容,同时保留了物种内部的功能.
- 在体内蛋白质功能研究弥合了基因组进化,分子相互作用和表型变异.
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