Oxygen-Evolving Mn Cluster in Photosystem II: The Protonation Pattern and Oxidation State in the High-Resolution Crystal Structure

2012 ◽  
Vol 134 (17) ◽  
pp. 7442-7449 ◽  
Author(s):  
Artur Galstyan ◽  
Arturo Robertazzi ◽  
Ernst Walter Knapp
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Photosystem Ii ◽  
Oxidation State ◽  
Mn Cluster ◽  
Oxygen Evolving

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 Mechanism of Photodamage of the Oxygen Evolving Mn Cluster of Photosystem II by Excessive Light Energy

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Alonso Zavafer ◽  
Wataru Koinuma ◽  
Wah Soon Chow ◽  
Mun Hon Cheah ◽  
Hiroyuki Mino
Keyword(s):  
Photosystem Ii ◽  
Light Energy ◽  
Mn Cluster ◽  
Oxygen Evolving

Crystal structure of cyanobacterial photosystem II at 3.2 Å resolution: a closer look at the Mn-cluster

2004 ◽  
Vol 6 (20) ◽  
pp. 4733-4736 ◽  
Author(s):  
Jacek Biesiadka ◽  
Bernhard Loll ◽  
Jan Kern ◽  
Klaus-Dieter Irrgang ◽  
Athina Zouni
Keyword(s):  
Crystal Structure ◽  
Photosystem Ii ◽  
Mn Cluster
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