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首页> 外文会议>IUPAC (International Union of Pure and Applied Chemistry) 8th International Symposium on Macromolecule-Metal Complexes (MMC-9 Brooklyn) Aug 19-23, 2001 Brooklyn, New York >Assembly of Manganese-Oxo Clusters in Solution as Models for the Photosynthetic Oxygen-Evolving Complex
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Assembly of Manganese-Oxo Clusters in Solution as Models for the Photosynthetic Oxygen-Evolving Complex

机译：溶液中锰-氧团簇的组装作为光合作用耗氧复合物的模型

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摘要

The four-electron oxidation of water to form O_2 in photosynthesis is a light-driven process that occurs in the multi-subunit membrane protein Photosystem II (PSII). The reaction is catalyzed by an inorganic cluster known as the Oxygen Evolving Complex (OEC), which has a composition of Mn_4O_xCaCl_y. A preliminary X-ray crystal structure of PSn has recently been determined, but the nature of the ligands bound to the manganese ions and the internal structure of the core were not fully revealed. Insight into the structure of the OEC has been gained primarily through X-ray absorption spectroscopy (XAS) and spin resonance techniques (EPR/ENDOR) (reviewed in [3]). Based on these data, a number of candidate structures for the Mn_4O_x subcore were described, of which the two leading candidates are the Mn_4O_4-funnel and the Mn_4O_4/Mn_4O_2-butterfly subcores (Figure 1).
机译：水的四电子氧化在光合作用中形成O_2是一个光驱动过程，发生在多亚基膜蛋白光系统II（PSII）中。该反应由称为氧释放络合物（OEC）的无机簇催化，该簇具有Mn_4O_xCaCl_y的组成。最近已经确定了PSn的初步X射线晶体结构，但尚未完全揭示与锰离子结合的配体的性质和核的内部结构。对OEC结构的了解主要是通过X射线吸收光谱（XAS）和自旋共振技术（EPR / ENDOR）获得的（在[3]中进行了综述）。基于这些数据，描述了Mn_4O_x子核的许多候选结构，其中两个主要候选为Mn_4O_4-漏斗和Mn_4O_4 / Mn_4O_2-蝴蝶子核（图1）。

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