Orientation of the primary donor chlorophyll of photosystem II in chloroplast membranes

FEBS Letters ◽  
1976 ◽  
Vol 63 (1) ◽  
pp. 171-173 ◽  
2002 ◽  
Vol 357 (1426) ◽  
pp. 1471-1479 ◽  
Author(s):  
Martin Sjödin ◽  
Stenbjörn Styring ◽  
Björn Åkermark ◽  
Licheng Sun ◽  
Leif Hammarström

In the water–oxidizing reactions of photosystem II (PSII), a tyrosine residue plays a key part as an intermediate electron–transfer reactant between the primary donor chlorophylls (the pigment P 680 ) and the water–oxidizing Mn cluster. The tyrosine is deprotonated upon oxidation, and the coupling between the proton reaction and electron transfer is of great mechanistic importance for the understanding of the water–oxidation mechanism. Within a programme on artificial photosynthesis, we have made and studied the proton–coupled tyrosine oxidation in a model system and been able to draw mechanistic conclusions that we use to interpret the analogous reactions in PSII.


2020 ◽  
Vol 1861 (10) ◽  
pp. 148248 ◽  
Author(s):  
Martyna Judd ◽  
Jennifer Morton ◽  
Dennis Nürnberg ◽  
Andrea Fantuzzi ◽  
A. William Rutherford ◽  
...  
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