Elevation of photosystem II thermal stability at pH 5.7 due to the structural transition in the oxygen-evolving complex

2021 ◽  
Author(s):  
Elena Lovyagina ◽  
Boris Semin
Keyword(s):  
Thermal Stability ◽  
Photosystem Ii ◽  
Structural Transition ◽  
Oxygen Evolving Complex ◽  
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.

Theory of chemical bonds in metalloenzymes XXIII fundamental principles for the photo-induced water oxidation in oxygen evolving complex of photosystem II

2020 ◽  
Vol 118 (21-22) ◽  
pp. e1725168
Author(s):  
K. Yamaguchi ◽  
S. Yamanaka ◽  
H. Isobe ◽  
M. Shoji ◽  
K. Miyagawa ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Oxidation ◽  
Oxygen Evolving Complex ◽  
Chemical Bonds ◽  
Theory Of Chemical Bonds ◽  
Oxygen Evolving
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