The Structural Basis for the Extraordinary Energy-Transfer Capabilities of the Phycobilisome
The Structural Basis for the Extraordinary Energy-Transfer Capabilities of the Phycobilisome
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DOI：
10.1007/978-981-10-7757-9_3
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发表时间：
2018-01-01
期刊：
影响因子：
--
通讯作者：
Adir, Noam
中科院分区：
文献类型：
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作者：
Harris, Dvir;Bar-Zvi, Shira;Adir, Noam
光吸收是光合作用过程的第一步。在所有物种中，大部分光都被称为光收集复合物或天线复合物的专用色素蛋白质复合物吸收。在蓝藻和红藻的情况下，在各种生态位中发现的光合生物，主要的天线被称为藻胆异构体（PBS）。PBS具有许多独特的特征，使其与其他生物（细菌、藻类和植物）的天线复合体区别开来。这些差异包括吸收光的发色团的类型、发色团的蛋白质环境、组装和结合的方法以及与光合反应中心（RCs）相关的细胞间位置。由于所有天线复合物的最终目标是相同的——控制太阳能量的吸收和转移到rc， PBS独特的结构和化学差异也需要独特的能量转移机制和途径。在这篇综述中，我们将详细描述导致成熟的PBS的结构方面，然后尝试了解PBS的能量传递特性，因为它们已经被实验测量。
Light absorption is the initial step in the photosynthetic process. In all species, most of the light is absorbed by dedicated pigment-protein complexes called light harvesting complexes or antenna complexes. In the case of cyanobacteria and red-algae, photosynthetic organisms found in a wide variety of ecological niches, the major antenna is called the Phycobilisome (PBS). The PBS has many unique characteristics that sets it apart from the antenna complexes of other organisms (bacteria, algae and plants). These differences include the type of light absorbing chromophores, the protein environment of the chromophores, the method of assembly and association and the intercellular location with respect to the photosynthetic reaction centers (RCs). Since the final goal of all antenna complexes is the same - controlled absorption and transfer of the energy of the sun to the RCs, the unique structural and chemical differences of the PBS also require unique energy transfer mechanisms and pathways. In this review we will describe in detail the structural facets that lead to a mature PBS, followed by an attempt to understand the energy transfer properties of the PBS as they have been measured experimentally.