Advances in the Spectroscopic and Structural Characterization of Core Light-Harvesting Complexes from Purple Phototrophic Bacteria
Advances in the Spectroscopic and Structural Characterization of Core Light-Harvesting Complexes from Purple Phototrophic Bacteria
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DOI：
10.1021/acs.jpcb.2c06638
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发表时间：
2023-01-03
影响因子：
3.3
通讯作者：
Wang-Otomo, Zheng-Yu
中科院分区：
文献类型：
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作者：
Kimura, Yukihiro;Tani, Kazutoshi;Wang-Otomo, Zheng-Yu
紫色光养细菌是古老的无氧光养生物和有吸引力的研究工具，因为它们捕获光谱的近红外（NIR）区域中的光能，并通过上坡能量转移将其转化为化学能。该反应的核心发生在光捕获1-反应中心（LH 1-RC）复合体中，它们是了解II型（利用醌）反应中心内基本光合反应的最简单模型系统。在这个角度来看，我们强调结构与功能的关系，在紫色细菌光合作用，包括LH 1相关的BChl分子的多样化的光捕获能力，在RC特殊对光电转换所需的能量，和醌运输机制尚未解决的基本过程。基于最近的进展，从各种紫色光养生物的LH 1-RC复合物的光谱和结构分析，我们讨论了几个关键因素，了解紫色细菌资源光能在固有的能量贫乏的近红外区域的电磁波谱。
Purple phototrophic bacteria are ancient anoxygenic phototrophs and attractive research tools because they capture light energy in the near-infrared (NIR) region of the spectrum and transform it into chemical energy by way of uphill energy transfers. The heart of this reaction occurs in light-harvesting 1-reaction center (LH1-RC) complexes, which are the simplest model systems for understanding basic photosynthetic reactions within type-II (quinone-utilizing) reaction centers. In this Perspective, we highlight structure-function relationships concerning unresolved fundamental processes in purple bacterial photosynthesis, including the diversified light-harvesting capacity of LH1-associated BChl molecules, energies necessary for photoelectric conversion in the RC special pairs, and quinone transport mechanisms. Based on recent progress in the spectroscopic and structural analysis of LH1-RC complexes from a variety of purple phototrophs, we discuss several key factors for understanding how purple bacteria resource light energy in the inherently energy poor NIR region of the electromagnetic spectrum.