New Linear High-Valent Tetranuclear Manganese-Oxo Cluster Relevant to the Oxygen-Evolving Complex of Photosystem II with Oxo, Hydroxo, and Aqua Coordinated to a Single Mn(IV)

2005 ◽  
Vol 44 (25) ◽  
pp. 9567-9573 ◽  
Author(s):  
Chen ◽  
Marie-Noëlle Collomb ◽  
Carole Duboc ◽  
Geneviève Blondin ◽  
Eric Rivière ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Oxygen Evolving Complex ◽  
High Valent ◽  
Oxygen Evolving

scholarly journals Preparation and properties of an MnIV–hydroxide complex: proton and electron transfer at a mononuclear manganese site and its relationship to the oxygen evolving complex within photosystem II

2014 ◽  
Vol 5 (8) ◽  
pp. 3064-3071 ◽  
Author(s):  
Taketo Taguchi ◽  
Kari L. Stone ◽  
Rupal Gupta ◽  
Benedikt Kaiser-Lassalle ◽  
Junko Yano ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Oxygen Evolving Complex ◽  
High Valent ◽  
Oxygen Evolving

Preparation of new MnIV–OH complex leads to insights into the steps needed to produce high valent Mn–ox species.

scholarly journals Structural Changes in the Acceptor Site of Photosystem II upon Ca2+/Sr2+ Exchange in the Mn4CaO5 Cluster Site and the Possible Long-Range Interactions

Biomolecules ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 371
Author(s):  
Koua
Keyword(s):  
Crystal Structure ◽  
Photosystem Ii ◽  
Long Range ◽  
Electron Acceptor ◽  
Structural Changes ◽  
Acceptor Site ◽  
Oxygen Evolving Complex ◽  
Long Range Interactions ◽  
Structural Perturbations ◽  
Oxygen Evolving

The Mn4CaO5 cluster site in the oxygen-evolving complex (OEC) of photosystem II (PSII) undergoes structural perturbations, such as those induced by Ca2+/Sr2+ exchanges or Ca/Mn removal. These changes have been known to induce long-range positive shifts (between +30 and +150 mV) in the redox potential of the primary quinone electron acceptor plastoquinone A (QA), which is located 40 Å from the OEC. To further investigate these effects, we reanalyzed the crystal structure of Sr-PSII resolved at 2.1 Å and compared it with the native Ca-PSII resolved at 1.9 Å. Here, we focus on the acceptor site and report the possible long-range interactions between the donor, Mn4Ca(Sr)O5 cluster, and acceptor sites.

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