随机序列的表达和人类细胞中从老鼠进化的新基因的表达揭示了功能多样性和特异性
Silvia Aldrovandi1,2, Johana Fajardo Castro1,3, Kristian Ullrich1
1Max-Planck Institute for Evolutionary Biology, Dept. Evol. Genetics, Plön 24306, Germany.
Genome biology and evolution
|December 12, 2024
概括
从DNA中新发现的de novo蛋白质可以改变细胞生长. 大多数随机序列和老鼠的新基因都影响了人类细胞的频率,这表明它们与细胞通路的整合.
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:
- 非编码DNA可以产生新型蛋白质 (de novo基因).
- 这些de novo蛋白质可能会影响细胞生理学,并提供适应性优势.
- 了解它们的影响对于进化和细胞生物学至关重要.
研究的目的:
- 为了研究在人类细胞系中表达随机序列和小鼠新基因的效果.
- 确定这些新型蛋白质是否影响细胞生长和生理学.
- 探索 de novo 基因融入细胞调节通路的潜力.
主要方法:
- 随机DNA序列和小鼠新基因的表达,在人类细胞系中缺乏人类同类基因.
- 通过联合生长实验,分析细胞克隆中的差异生长效应.
- 对个体de novo基因效应的转录基因分析.
- 对于疾病和可折叠性的新基因开放阅读框架 (ORF) 的结构分析.
主要成果:
- 随机序列的表达导致53%的克隆频率下降,8%的克隆频率增加.
- 在14个小鼠de novo基因中,10个基因的频率下降,3个基因的频率增加.
- 单个小鼠的de novo基因诱导了独特的转录组反应,表明了特定的效应.
- 蛋白质的结构特征 (障碍,折叠性) 与生长效应没有相关性.
结论:
- 新开发的开放式读取框架 (ORF) 可以显著影响细胞生长和频率.
- 大多数新的ORF与细胞调节通路相互作用.
- 这些发现表明,在特定条件下,de novo蛋白质可以很容易地被整合和潜在地被选择.
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