scholarly journals Role of bicarbonate at the acceptor side of Photosystem II

2005 ◽  
pp. 303-310 ◽  
Author(s):  
Jack J. S. van Rensen
Keyword(s):  
Photosystem Ii ◽  
Acceptor Side

scholarly journals The Role of Selected Wavelengths of Light in the Activity of Photosystem II in Gloeobacter violaceus

2021 ◽  
Vol 22 (8) ◽  
pp. 4021
Author(s):  
Monika Kula-Maximenko ◽  
Kamil Jan Zieliński ◽  
Ireneusz Ślesak
Keyword(s):  
Photosystem Ii ◽  
Spectral Composition ◽  
Photosynthetic Electron Transport ◽  
Metabolic Energy ◽  
Light Conditions ◽  
Gloeobacter Violaceus ◽  
Transport Chain ◽  
Cyanobacterial Culture ◽  
Photosynthetic Antennas

Gloeobacter violaceus is a cyanobacteria species with a lack of thylakoids, while photosynthetic antennas, i.e., phycobilisomes (PBSs), photosystem II (PSII), and I (PSI), are located in the cytoplasmic membrane. We verified the hypothesis that blue–red (BR) light supplemented with a far-red (FR), ultraviolet A (UVA), and green (G) light can affect the photosynthetic electron transport chain in PSII and explain the differences in the growth of the G. violaceus culture. The cyanobacteria were cultured under different light conditions. The largest increase in G. violaceus biomass was observed only under BR + FR and BR + G light. Moreover, the shape of the G. violaceus cells was modified by the spectrum with the addition of G light. Furthermore, it was found that both the spectral composition of light and age of the cyanobacterial culture affect the different content of phycobiliproteins in the photosynthetic antennas (PBS). Most likely, in cells grown under light conditions with the addition of FR and G light, the average antenna size increased due to the inactivation of some reaction centers in PSII. Moreover, the role of PSI and gloeorhodopsin as supplementary sources of metabolic energy in the G. violaceus growth is discussed.

scholarly journals Role of redox-inactive metals in controlling the redox potential of heterometallic manganese–oxido clusters

2021 ◽  
Author(s):  
Keisuke Saito ◽  
Minesato Nakagawa ◽  
Manoj Mandal ◽  
Hiroshi Ishikita
Keyword(s):  
Photosystem Ii ◽  
Redox Potential ◽  
Quantum Chemical Calculations ◽  
Catalytic Reaction ◽  
Quantum Chemical ◽  
Ionic Radius ◽  
Redox Potentials ◽  
Oxygen Evolving ◽  
Highest Occupied Molecular Orbitals

AbstractPhotosystem II (PSII) contains Ca2+, which is essential to the oxygen-evolving activity of the catalytic Mn4CaO5 complex. Replacement of Ca2+ with other redox-inactive metals results in a loss/decrease of oxygen-evolving activity. To investigate the role of Ca2+ in this catalytic reaction, we investigate artificial Mn3[M]O2 clusters redox-inactive metals  [M] ([M]  = Mg2+, Ca2+, Zn2+, Sr2+, and Y3+), which were synthesized by Tsui et al. (Nat Chem 5:293, 2013). The experimentally measured redox potentials (Em) of these clusters are best described by the energy of their highest occupied molecular orbitals. Quantum chemical calculations showed that the valence of metals predominantly affects Em(MnIII/IV), whereas the ionic radius of metals affects Em(MnIII/IV) only slightly.

Coupled Activation of the Donor and the Acceptor Side of Photosystem II during Photoactivation of the Oxygen Evolving Cluster†

Biochemistry ◽  
1998 ◽  
Vol 37 (31) ◽  
pp. 11039-11045 ◽  
Author(s):  
Maria Rova ◽  
Fikret Mamedov ◽  
Ann Magnuson ◽  
Per-Olof Fredriksson ◽  
Stenbjörn Styring
Keyword(s):  
Photosystem Ii ◽  
Acceptor Side ◽  
Oxygen Evolving

scholarly journals Role of the RCII-D1 Protein in the Reversible Association of the Oxygen-evolving Complex Proteins with the Lumenal Side of Photosystem II

1995 ◽  
Vol 270 (50) ◽  
pp. 30181-30186 ◽  
Author(s):  
Yael Eisenberg-Domovich ◽  
Ralf Oelmüller ◽  
Reinhold G. Herrmann ◽  
Itzhak Ohad
Keyword(s):  
Photosystem Ii ◽  
D1 Protein ◽  
Oxygen Evolving Complex ◽  
Reversible Association ◽  
Oxygen Evolving

Role of Phosphatidylglycerol in Oxygen-Evolving Complex of Photosystem II

2008 ◽  
pp. 463-466 ◽  
Author(s):  
Naoki Mizusawa ◽  
Isamu Sakurai ◽  
Hisako Kubota ◽  
Hajime Wada
Keyword(s):  
Photosystem Ii ◽  
Oxygen Evolving Complex ◽  
Oxygen Evolving

scholarly journals Depletion of extracellular ATP affects the photosystem II photochemistry and the role of salicylic acid in this process

2019 ◽  
Vol 57 (2) ◽  
pp. 533-539 ◽  
Author(s):  
Q.Z. HOU ◽  
X. PANG ◽  
K. SUN ◽  
J.Y. LIANG ◽  
L.Y. JIA ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Photosystem Ii ◽  
Extracellular Atp ◽  
Photosystem Ii Photochemistry
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