Differential scanning calorimetric studies of photosystem II: Evidence for a structural role for cytochrome b559 in the oxygen-evolving complex

Biochemistry ◽  
1986 ◽  
Vol 25 (20) ◽  
pp. 6161-6169 ◽  
Author(s):  
Lynmarie K. Thompson ◽  
Julian M. Sturtevant ◽  
Gary W. Brudvig
Keyword(s):  
Photosystem Ii ◽  
Differential Scanning Calorimetric ◽  
Oxygen Evolving Complex ◽  
Cytochrome B559 ◽  
Structural Role ◽  
Calorimetric Studies ◽  
Oxygen Evolving

scholarly journals Inhibition of oxygen evolution in Photosystem II by Cu(II) ions is associated with oxidation of cytochrome b559

2003 ◽  
Vol 371 (2) ◽  
pp. 597-601 ◽  
Author(s):  
Kvetoslava BURDA ◽  
Jerzy KRUK ◽  
Georg H. SCHMID ◽  
Kazimierz STRZALKA
Keyword(s):  
Photosystem Ii ◽  
Fluorescence Quenching ◽  
Oxygen Evolution ◽  
Copper Ions ◽  
Oxygen Evolving Complex ◽  
Cytochrome B559 ◽  
Low Concentrations ◽  
Target Sites ◽  
Potential Form ◽  
Oxygen Evolving

We have found that elevated copper concentrations, apart from the inhibition of oxygen evolution, changed the initial states distribution of the oxygen-evolving complex. Already at low concentrations, copper ions oxidized the low-potential form of cytochrome b559 and also its high-potential form at higher concentrations at which fluorescence quenching was observed. We suggest that the primary target sites in Photosystem II for copper is tyrosinez, both cytochrome b559 forms and chlorophyllz, and that these sites are the source of the copper-induced fluorescence quenching and oxygen evolution inhibition in Photosystem II.

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

scholarly journals Changes in Structural and Functional Properties of Oxygen-evolving Complex Induced by Replacement of D1-Glutamate 189 with Glutamine in Photosystem II

2005 ◽  
Vol 280 (45) ◽  
pp. 37895-37900 ◽  
Author(s):  
Yukihiro Kimura ◽  
Naoki Mizusawa ◽  
Asako Ishii ◽  
Shigeaki Nakazawa ◽  
Taka-aki Ono
Keyword(s):  
Photosystem Ii ◽  
Functional Properties ◽  
Oxygen Evolving Complex ◽  
Structural And Functional Properties ◽  
Oxygen Evolving

Identification of a Mn−O−Mn Cluster Vibrational Mode of the Oxygen-Evolving Complex in Photosystem II by Low-Frequency FTIR Spectroscopy†

Biochemistry ◽  
2000 ◽  
Vol 39 (47) ◽  
pp. 14371-14376 ◽  
Author(s):  
Hsiu-An Chu ◽  
Heather Sackett ◽  
Gerald T. Babcock
Keyword(s):  
Photosystem Ii ◽  
Ftir Spectroscopy ◽  
Vibrational Mode ◽  
Low Frequency ◽  
Oxygen Evolving Complex ◽  
Mn Cluster ◽  
Oxygen Evolving

Evolution of Triplet Oxygen Molecule at the S4State in Oxygen Evolving Complex of Photosystem II. A B3LYP Study

2016 ◽  
Vol 45 (12) ◽  
pp. 1391-1393
Author(s):  
Yasunori Yoshioka
Keyword(s):  
Photosystem Ii ◽  
Oxygen Molecule ◽  
Oxygen Evolving Complex ◽  
Oxygen Evolving
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