探索氧和无氧光合作用在深度分支的菌中起源和演变的过程
Sha Tan1,2,3, Lan Liu1,2,3, Jian-Yu Jiao1,2,3
1State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, PR China.
Molecular biology and evolution
|July 23, 2024
概括
早期的蓝藻细菌,包括Thermostichales和Gloeomargaritales,表现出光合作用灵活性. 这些古老的血统进化了甲状腺膜,并获得了硫化物驱动的无氧光合作用,揭示了早期细菌进化的见解.
科学领域:
- 微生物学和进化生物学.
- 光合作用研究研究光合作用.
- 长生生物进化 长生生物进化
背景情况:
- 菌群是关键的原核生物,具有独特的氧化光合作用 (OxyP).
- 菌的早期进化和OxyP的起源仍然不完全理解.
- 深度分支的血统为古代光合作用过程提供了洞察力.
研究的目的:
- 通过元基因组学和元转录组学研究蓝菌的早期进化.
- 探索Thermostichales和Gloeomargaritales的光合作用能力和进化历史.
- 阐明早期蓝菌中关键的光合作用结构和途径的起源.
主要方法:
- 分析来自温泉生态系统的36个元基因组组装基因组 (MAG).
- 遗传学分析以确定蓝藻细菌种群之间的进化关系.
- 功能性基因分析以确定参与光合作用的关键蛋白质和途径.
主要成果:
- 热敏类动物在塑体1 (Vipp1) 中具有诱导囊泡的蛋白质,这表明甲状腺膜的进化早于它们的分离.
- 热类和类有潜力通过横向基因转移进行硫化物驱动的无氧光合作用 (AnoxyP).
- 在Thermostichales中,精简的 phycobilisomes 和双D1蛋白质变体表明适应波动的环境.
结论:
- 热敏体代表了一个古老的血统,从共同的祖先中继承了甲状腺膜.
- 光合作用灵活性,包括获得的AnoxyP和可适应的光系统,是这些早期分离的蓝藻细菌的特征.
- 这项研究提供了关于菌的早期进化及其多样化的光合作用策略的新视角.
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