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光合放氧复合体S2态中g = 4.1电子顺磁共振信号归属于锰的研究：X射线吸收边光谱研究

Assignment of the g = 4.1 EPR signal to manganese in the S2 state of the photosynthetic oxygen-evolving complex: an X-ray absorption edge spectroscopy study.

作者信息

Cole J, Yachandra V K, Guiles R D, McDermott A E, Britt R D, Dexheimer S L, Sauer K, Klein M P

出版信息

Biochim Biophys Acta. 1987 Mar 4;890(3):395-8. doi: 10.1016/0005-2728(87)90169-1.

DOI:10.1016/0005-2728(87)90169-1
PMID:3028479
Abstract

X-ray absorption spectroscopy at the Mn K-edge has been utilized to study the origin of the g = 4.1 EPR signal associated with the Mn-containing photosynthetic O2-evolving complex. Formation of the g = 4.1 signal by illumination of Photosystem II preparations at 140 K is associated with a shift of the Mn edge inflection point to higher energy. This shift is similar to that observed upon formation of the S2 multiline EPR signal by 190 K illumination. The g = 4.1 signal is assigned to the Mn complex in the S2 state.

摘要

利用锰K边的X射线吸收光谱来研究与含锰光合放氧复合体相关的g = 4.1电子顺磁共振（EPR）信号的起源。在140 K下光照光系统II制剂形成g = 4.1信号与锰边拐点向更高能量的移动有关。这种移动类似于在190 K光照下形成S2多线EPR信号时观察到的移动。g = 4.1信号被归因于处于S2状态的锰复合体。

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