Hydrophilicity and oxophilicity of the isolated CaMn4O5 cationic cluster modeling inorganic core of the oxygen-evolving complex

2019 ◽  
Vol 55 (95) ◽  
pp. 14327-14330 ◽  
Author(s):  
Yufei Zhang ◽  
Daigo Masuzaki ◽  
Fumitaka Mafuné
Keyword(s):  
Oxygen Evolving Complex ◽  
Cluster Modeling ◽  
Oxygen Evolving

Isolated CaMn4O5+ was hardly formed in the presence of oxygen, whereas CaMn4O4(OH)2+ was formed stably in the presence of water.

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.

scholarly journals CaMn3IVO4 Cubane Models of the Oxygen Evolving Complex: Spin Ground States S < 9/2 and the Effect of Oxo Protonation

2021 ◽  
Author(s):  
Heui Beom Lee ◽  
Angela A Shiau ◽  
David Marchiori ◽  
Paul H Oyala ◽  
BYUNG-KUK Yoo ◽  
...  
Keyword(s):  
Ground States ◽  
Oxygen Evolving Complex ◽  
Complex Spin ◽  
Oxygen Evolving
Sign in / Sign up

Export Citation Format

Share Document