在毛动物中非正规使用停止编码子扩展了具有结构灵活的Q丰富基因的蛋白质
Chi-Ning Chuang1, Hou-Cheng Liu1, Tai-Ting Woo1
1Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan.
eLife
|February 23, 2024
概括
富含Q的基因,如氨酸/三氨酸-氨酸集群域 (SCD) 和多重氨酸通道,增强蛋白质表达并提供进化灵活性. 这些图案在特殊的真核生物生物过程和神经系统中普遍存在.
科学领域:
- 分子生物学分子生物学
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
背景情况:
- 氨酸 (S) /氨酸 (T) -氨酸 (Q) 集群域 (SCD),多氨酸 (polyQ) 段和多氨酸/氨酸 (polyQ/N) 段是富含Q的蛋白质基因.
- SCD 本质上是无序的,并通过酸化和蛋白质相互作用,而多Q通道是灵活的,可以触发蛋白质聚合.
研究的目的:
- 为了研究Q丰富基因的蛋白质表达增强活性.
- 探索Q丰富基因在真核生物中的进化意义和分布.
- 了解 Q 丰富图案,代码子使用和三重重复障碍之间的关系.
主要方法:
- 对酵母蛋白进行分析,以确定增强表达的富含Q的基因.
- 对26种真核模型生物体的蛋白质组进行了比较基因本体学 (GO) 分析.
- 检查具有重新分配TAAQ和TAGQ编码子的长毛动物中的Q丰富动机扩张.
主要成果:
- 酵母中的4个SCD和3个与相关的Q/N丰富基因在酵母中表现出自主蛋白质表达增强活动.
- 富含Q的基因在不同类型的真核生物中涉及特殊生物过程的蛋白质中普遍存在,包括RNA介导的转移,丝状生长和神经系统发育.
- 类动物中 Q 丰富基因蛋白的大规模扩张,具有重新分配的编码,较低的 CAGQ 频率表明共进化,以防止三重重复疾病.
结论:
- 富含Q的图案提供了结构和功能性可塑性,作为进化新性的宝贵工具.
- 富含Q的动图的分布突显了它们在特殊的真核细胞功能和复杂的生物过程中的作用.
- 在毛动物中,非正规的停止子使用可能与子偏差共同演变,以减轻与三重重复扩张相关的风险.
关键词:
它们中的一种是S. cerevisiae.生物化学 生物化学在Candida Albicans中,它是最常见的.化学生物学 化学生物学状的 状的codon 的使用情况迪克蒂奥斯利乌姆 (Dictyostelium) 和迪斯科伊迪乌姆 (Discoideum) 是两种类型的体.这种植物是Drosophila melanogaster.人类智人 (Homo sapiens sapiens) 是一个有智慧的人类.本质上是无序的区域.介质变化 (meiosis) 是一种变质的过程.肌肉 肌肉的肌肉血病毒的错误 (Plasmodium falciparum) 已经被发现.聚氨酸多重氨酸的使用方法复制滑落 复制滑落 复制滑落甲热 (Tetrahymena thermophila) 是一种热的植物.相关概念视频
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