深度分支的进化中间体揭示了I形鲁比斯科的结构起源
Albert K Liu1, Benjamin Kaeser2, LinXing Chen3
1Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Feedstocks Division, Joint BioEnergy Institute, Emeryville, CA, USA; Biochemistry, Molecular, Cellular and Developmental Biology Graduate Group, University of California, Davis, Davis, CA 95616, USA.
Current biology : CB
|November 18, 2023
概括
研究人员研究了rubisco (ribulose-1,5-bisphosphate carboxylase/oxygenase) 的演变,这是关键的碳固定酶. 他们发现了关于鲁比斯科如何从简单的形式过渡到复杂的形式的结构性见解,解释了流行的形式I鲁比斯科的演变.
科学领域:
- 生物化学 生物化学
- 进化生物学 进化生物学
- 结构生物学 结构生物学
背景情况:
- 鲁比斯科 (ribulose-1,5-bisphosphate carboxylase/oxygenase) 在生物碳固定过程中至关重要.
- 大多数鲁比斯科都是同型寡合体,但在植物,藻类和蓝藻中广泛存在的鲁比斯科形式是异型寡合体.
- 发现形式I的鲁比斯科,形式I的同类寡合相亲,突出了理解形式I的进化起源的差距.
研究的目的:
- 为了研究导致异性寡合体形式I rubisco的进化路径.
- 了解分子事件驱动从同类寡合体过渡到异质寡合体鲁比斯科组合.
- 为鲁比斯科结构和功能提供进化背景.
主要方法:
- 鲁比斯科酶的比较结构分析.
- 深度分支的结构特征形式Iα和I' rubiscos从元基因组数据.
- 解决三维结构的形式我'鲁比斯科.鲁比斯科.
主要成果:
- 这项研究揭示了鲁比斯科组装的复杂进化轨迹.
- 介质形式 (Iα和I'') 的结构性表征为早期进化提供了洞察力.
- 形态I'Rubisco的结构确定了分子特征,使转向异质寡合化成为可能.
结论:
- 这些发现揭示了导致流行的异性寡合体形式I rubisco.的进化步骤.
- 这项研究加深了我们在蛋白质进化更广泛的背景下对鲁比斯科进化的理解.
- 该研究提供了关键的分子细节,介绍了从同型酶结构转变为异型寡合酶结构的过程.
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