Light-harvesting in photosystem I.
Light-harvesting in photosystem I.
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DOI：
10.1007/s11120-013-9838-x
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发表时间：
2013-10
影响因子：
3.7
通讯作者：
van Amerongen, Herbert
中科院分区：
文献类型：
--
作者：
Croce, Roberta;van Amerongen, Herbert
本文综述了光系统I（PSI）及其LHCI外天线的捕光特性。LHCI由不同的叶绿素a/B结合蛋白组成，称为Lhca，围绕PSI的核心。总的来说，高等植物的PSI-LHCI复合物包含173个叶绿素分子，其中大部分是为了收集阳光能量并将所产生的激发能量转移到反应中心（RC），在那里它用于电荷分离。综合体的效率基于尽可能快地将这种能量输送到RC的能力，以最大限度地减少能量损失。PSI在这方面的性能是显著的：平均而言，它需要约50 ps的激励，以达到RC在植物，而不会被淬灭在此期间。这意味着内部量子效率接近100%，这使得PSI成为自然界中最有效的能量转换器。在这篇综述中，我们描述了与蛋白质和色素组织/组合物有关的复合物的光捕获特性，并且我们讨论了确保其非常高的量子效率的重要参数。激发能量转移和捕获的核心和/或Lhcas，以及在超复合物PSI-LHCI和PSI-LHCI-LHCII的详细描述，目的是给出这些复合物的功能行为的概述。
This review focuses on the light-harvesting properties of photosystem I (PSI) and its LHCI outer antenna. LHCI consists of different chlorophyll a/b binding proteins called Lhca’s, surrounding the core of PSI. In total, the PSI-LHCI complex of higher plants contains 173 chlorophyll molecules, most of which are there to harvest sunlight energy and to transfer the created excitation energy to the reaction center (RC) where it is used for charge separation. The efficiency of the complex is based on the capacity to deliver this energy to the RC as fast as possible, to minimize energy losses. The performance of PSI in this respect is remarkable: on average it takes around 50 ps for the excitation to reach the RC in plants, without being quenched in the meantime. This means that the internal quantum efficiency is close to 100 % which makes PSI the most efficient energy converter in nature. In this review, we describe the light-harvesting properties of the complex in relation to protein and pigment organization/composition, and we discuss the important parameters that assure its very high quantum efficiency. Excitation energy transfer and trapping in the core and/or Lhcas, as well as in the supercomplexes PSI-LHCI and PSI-LHCI-LHCII are described in detail with the aim of giving an overview of the functional behavior of these complexes.
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影响因子：
3.7
作者：
Bossmann, B;Knoetzel, J;Jansson, S
通讯作者：
Jansson, S
影响因子：
15
作者：
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通讯作者：
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影响因子：
2.9
作者：
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通讯作者：
Croce, R
影响因子：
2.4
作者：
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通讯作者：
FORSTER, T
影响因子：
64.8
作者：
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通讯作者：
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