远红光适应光系统I的分子多样性和演变
Christopher J Gisriel1, Donald A Bryant2, Gary W Brudvig1,3
1Department of Chemistry, Yale University, New Haven, CT, United States.
Frontiers in plant science
|December 6, 2023
概括
菌进化了远红光 (FRL) 光适应 (FaRLiP) 以使用FRL进行光合作用. 我祖先的光系统可能有三个叶绿素f结合点,FRL特异的子单元在蓝藻细菌历史中晚些时候进化.
科学领域:
- 微生物进化过程中的微生物.
- 光合作用 光合作用
- 分子适应分子适应.
背景情况:
- 菌必须适应不同的环境,其中远红光 (FRL) 光适应 (FaRLiP) 是一个关键机制.
- FaRLiP涉及上调调节的基因集群,这些基因集群修改光系统,以利用FRL进行光合作用.
- 了解FaRLiP的分子演变,可以了解蓝藻细菌的适应策略.
研究的目的:
- 研究参与FaRLiP的光系统I (PSI) 子单元的分子进化.
- 为了预测FRL吸收PSI的祖先特征.
- 为了比较FRL特定的PSI与光系统II (PSII) 的进化时间表.
主要方法:
- 在FaRLiP基因群中编码的PSI子单元的家族遗传学分析.
- 对FRL吸收PSI的可用结构数据的分析.
- 与FRL特定的PSII子单位进行比较进化分析.
主要成果:
- 特定于FRL的PSI子单位似乎比某些特定于FRL的PSII子单位晚发展.
- 在Nodosilineales序列可能通过横向基因转移获得了FaRLiP.
- 祖先的FRL吸收PSI在PsaB2中拥有三个叶绿素f结合位点,在A0B位点有一个旋转的叶绿素a.
结论:
- 这项研究阐明了FRL吸收PSI的进化轨迹.
- 横向基因转移是某些蓝藻细菌中FaRLiP获取的一个潜在机制.
- 这些发现有助于全面了解FaRLiP相关光系统复合体的分子进化.
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