Proton Release Reaction of Tyrosine D in Photosystem II

2020 ◽  
pp. 37-51
Author(s):  
Shin Nakamura
Keyword(s):  
Photosystem Ii ◽  
Proton Release ◽  
Release Reaction ◽  
Tyrosine D

Fourier Transform Infrared Difference Spectroscopy of Photosystem II Tyrosine D Using Site-Directed Mutagenesis and Specific Isotope Labeling†

Biochemistry ◽  
1997 ◽  
Vol 36 (48) ◽  
pp. 14712-14723 ◽  
Author(s):  
Rainer Hienerwadel ◽  
Alain Boussac ◽  
Jacques Breton ◽  
Bruce A. Diner ◽  
Catherine Berthomieu
Keyword(s):  
Fourier Transform ◽  
Photosystem Ii ◽  
Isotope Labeling ◽  
Fourier Transform Infrared ◽  
Site Directed Mutagenesis ◽  
Directed Mutagenesis ◽  
Difference Spectroscopy ◽  
Tyrosine D

Proton-Coupled Electron Transfer and Tyrosine D of Photosystem II

2007 ◽  
Vol 111 (43) ◽  
pp. 12599-12604 ◽  
Author(s):  
David L. Jenson ◽  
Amaris Evans ◽  
Bridgette A. Barry
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Proton Coupled Electron Transfer ◽  
Tyrosine D

Spectroscopic Evidence for a Redox-Controlled Proton Gate at Tyrosine D in Photosystem II

Biochemistry ◽  
2014 ◽  
Vol 53 (36) ◽  
pp. 5721-5723 ◽  
Author(s):  
Johannes Sjöholm ◽  
Fikret Mamedov ◽  
Stenbjörn Styring
Keyword(s):  
Photosystem Ii ◽  
Spectroscopic Evidence ◽  
Tyrosine D

245 GHz High-Field EPR Study of Tyrosine-D° and Tyrosine-Z° in Mutants of Photosystem II†

Biochemistry ◽  
1996 ◽  
Vol 35 (3) ◽  
pp. 679-684 ◽  
Author(s):  
Sun Un ◽  
Xiao-Song Tang ◽  
Bruce A. Diner
Keyword(s):  
Photosystem Ii ◽  
High Field ◽  
Tyrosine Z ◽  
Tyrosine D

scholarly journals FTIR detection of water reactions in the oxygen-evolving centre of photosystem II

2007 ◽  
Vol 363 (1494) ◽  
pp. 1189-1195 ◽  
Author(s):  
Takumi Noguchi
Keyword(s):  
Photosystem Ii ◽  
Water Oxidation ◽  
State Transitions ◽  
Proton Release ◽  
Difference Spectra ◽  
Band Shift ◽  
Bonding Structure ◽  
Ph Dependency ◽  
Ftir Difference Spectroscopy ◽  
Oxygen Evolving

Flash-induced Fourier transform infrared (FTIR) difference spectroscopy has been used to study the water-oxidizing reactions in the oxygen-evolving centre of photosystem II. Reactions of water molecules were directly monitored by detecting the OH stretching bands of weakly H-bonded OH of water in the 3700–3500 cm −1 region in FTIR difference spectra during S-state cycling. In the S 1 →S 2 transition, a band shift from 3588 to 3617 cm −1 was observed, indicative of a weakened H-bond. Decoupling experiments using D 2 O : H 2 O (1 : 1) showed that this OH arose from a water molecule with an asymmetric H-bonding structure and this asymmetry became more significant upon S 2 formation. In the S 2 →S 3 , S 3 →S 0 and S 0 →S 1 transitions, negative bands were observed at 3634, 3621 and 3612 cm −1 , respectively, representing formation of a strong H-bond or a proton release reaction. In addition, using complex spectral features in the carboxylate stretching region (1600–1300 cm −1 ) as ‘fingerprints’ of individual S-state transitions, pH dependency of the transition efficiencies and the effect of dehydration were examined to obtain the information of proton release and water insertion steps in the S-state cycle. Low-pH inhibition of the S 2 →S 3 , S 3 →S 0 and S 0 →S 1 transitions was consistent with a view that protons are released in the three transitions other than S 1 →S 2 , while relatively high susceptibility to dehydration in the S 2 →S 3 and S 3 →S 0 transitions suggested the insertion of substrate water into the system during these transitions. Thus, a possible mechanism of water oxidation to explain the FTIR data is proposed.

scholarly journals Mechanism of tyrosine D oxidation in Photosystem II

2013 ◽  
Vol 110 (19) ◽  
pp. 7690-7695 ◽  
Author(s):  
K. Saito ◽  
A. W. Rutherford ◽  
H. Ishikita
Keyword(s):  
Photosystem Ii ◽  
Tyrosine D
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