植物鲁比斯科陪伴者的定向进化,具有改变客户端识别的特征
Siyu Li1, ByungUk Lee2, Yichong Lao3,4
1Department of Biochemistry, University of Wisconsin, Madison, WI 53706.
概括
研究人员重新编程了一种植物伴侣蛋白,以组装非本地Rubisco酶. 鲁比斯科工程的这一突破可以通过改善光合作用来提高作物生产率.
科学领域:
- 植物分子生物学 植物分子生物学
- 生物化学 生物化学
- 光合作用研究研究光合作用.
背景情况:
- 酶Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) 对于光合作用和作物生产率至关重要.
- 像Raf1这样的陪伴蛋白调解Rubisco组装,但对它们的本地Rubisco客户端具有很高的选择性.
- 这种选择性限制了Rubisco蛋白质工程和植物中外来Rubisco变体的表达.
研究的目的:
- 为了调查一棵植物鲁比斯科的陪伴者是否可以通过定向进化重新编程,以组装非本地鲁比斯科.
- 为了克服Rubisco工程中的选择性障碍,用于增强光合作用.
主要方法:
- 开发了一种高通量选择策略,以选Rubisco组装因子活动.
- 使用定向进化来产生Arabidopsis thaliana Raf1 (AtRaf1) 的突变物.
- 评估了进化AtRaf1变种组装尼古提亚烟草 (Nicotiana tabacum Rubisco) 的能力.
主要成果:
- 与野生类型的AtRaf1.1相比,定向进化成功生成了AtRaf1变体,具有明显增强的组装N. tabacum Rubisco的能力.
- 进化的AtRaf1变种保留了它们的本机客户端组装功能.
- 经过重新编程的陪伴者证明了他们能够组装其他非同类双色球鲁比斯科 (Dicot Rubisco) 的 Orthologs 的能力.
结论:
- 定向进化是一种可行的策略,可以为非本地客户重新编程植物鲁比斯科陪伴者.
- 这种方法可以克服Rubisco工程中的护送选择性限制.
- 这些发现为通过Rubisco修饰改善植物光合作用和作物产量提供了潜在的途径.
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