人类tRNA合成酶催化零值具有多种功能.
Wing-Sze Lo1, Elisabeth Gardiner2, Zhiwen Xu1
1IAS HKUST-Scripps R&D Laboratory, Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. Pangu Biopharma, Edinburgh Tower, The Landmark, 15 Queen's Road Central, Hong Kong, China.
概括
高级生物通过进化氨基酸tRNA合成酶 (AARSs) 变成新的信号蛋白来创造基因效率. 这些拼接变体保留了非催化域,产生了超出其原始催化作用的多样化,非酶功能.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生化学
背景情况:
- 高级生物的遗传效率依赖于从单个基因生成多个功能.
- 氨基酸tRNA合成酶 (AARSs) 是一种酶家族,在整个进化过程中以积累非催化域而闻名.
- 了解AARS进化,可以阐明基因功能多样化.
研究的目的:
- 研究人类氨基酸tRNA合成酶 (AARSs) 的功能多样化.
- 识别和表征来自AARSs.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.s.
- 探索AARS拼接变体中的非酶功能潜力.
主要方法:
- 生物信息分析以确定人类AARSs中的自然催化零值 (CNs).
- 拼接事件分析以了解域保留和删除.
- 编号的功能性特征,以确定它们的生物活动.
主要成果:
- 对每个人类AARS发现了许多自然催化零值 (CNs).
- 识别保存非催化域的拼接事件,同时删除催化域.
- 证明CN具有与其母合成酶不同的多种生物功能.
- 这些CNs作为信号蛋白的功能,其活动与原始催化功能正交.
结论:
- 人类AARS可以通过剪接事件转化为多个信号蛋白,从而产生催化零值 (CN).
- 这些CNs表现出多样化的非酶功能,这表明催化不活跃的拼接变体具有更广泛的作用.
- 这些发现支持这样一个假设:具有非酶功能的拼接变体是基因功能扩张的一般机制.
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