Charge Separation is Virtually Irreversible in Photosystem II Core Complexes with Oxidized Primary Quinone Acceptor

2011 ◽  
Vol 115 (16) ◽  
pp. 3947-3956 ◽  
Author(s):  
C. D. van der Weij−de Wit ◽  
J. P. Dekker ◽  
R. van Grondelle ◽  
I. H. M. van Stokkum
Keyword(s):  
Photosystem Ii ◽  
Charge Separation ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor

The Effects of Bicarbonate Depletion and Formate Incubation on the Kinetics of Oxidation-Reduction Reactions of the Photosystem II Quinone Acceptor Complex

1984 ◽  
Vol 39 (5) ◽  
pp. 382-385 ◽  
Author(s):  
Howard H. Robinson ◽  
Julian J. Eaton-Rye ◽  
Jack J. S. van Rensen ◽  
Keyword(s):  
Photosystem Ii ◽  
Redox State ◽  
Oxygen Electrode ◽  
Thylakoid Membranes ◽  
Acceptor Site ◽  
Kinetics Of Oxidation ◽  
Oxidation Reduction ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor ◽  
Kinetics Of

Chloroplast thylakoid membranes depleted of bicarbonate exhibit a slowed oxidation of the primary quinone acceptor (Qᴀ) by the secondary quinone acceptor (Qв) of photosystem II. The kinetics of these slowed reactions have been followed by using short xenon flashes of light both to excite photosystem II and to probe the redox state of Qᴀ. Thylakoids incubated with formate but not depleted of bicarbonate showed the same pattern of slowed reaction kinetics of the quinone acceptors as seen in bicarbonate-depleted| thylakoids. This led us to conclude that there was a simple competition between bicarbonate and formate at this site; however, steady-state electron transfer measured with an oxygen electrode showed that although the bicarbonate- depleted thylakoids were indeed inhibited, rates in the formate-incubated thylakoids were only slightly slowed. We suggest that the inhibition seen at the quinone acceptor site of photosystem II depends in a subtle way upon the rate of exchange of bicarbonate and formate at this site.

Characterization by FTIR spectroscopy of the photoreduction of the primary quinone acceptor QA in photosystem II

FEBS Letters ◽  
1990 ◽  
Vol 269 (2) ◽  
pp. 363-367 ◽  
Author(s):  
C. Berthomieu ◽  
E. Nabedryk ◽  
W. Mäntele ◽  
J. Breton
Keyword(s):  
Photosystem Ii ◽  
Ftir Spectroscopy ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor

Period-four Modulation of Photosystem II Primary Quinone Acceptor (QA) Reduction/Oxidation Kinetics in Thylakoid Membranes

2010 ◽  
Vol 86 (5) ◽  
pp. 1064-1070 ◽  
Author(s):  
Alain Gauthier ◽  
David Joly ◽  
Steve Boisvert ◽  
Robert Carpentier
Keyword(s):  
Photosystem Ii ◽  
Oxidation Kinetics ◽  
Thylakoid Membranes ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor

L protein, encoded by psbL , restores normal functioning of the primary quinone acceptor, QA , in isolated D1/D2/CP47/Cytb-559/I photosystem II reaction center core complex

FEBS Letters ◽  
1994 ◽  
Vol 354 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Kohji Kitamura ◽  
Shinichiro Ozawa ◽  
Takashi Shiina ◽  
Yoshinori Toyoshima
Keyword(s):  
Photosystem Ii ◽  
Reaction Center ◽  
Core Complex ◽  
Normal Functioning ◽  
L Protein ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor

Functional reconstitution of the primary quinone acceptor, QA, in the Photosystem II core complexes

1993 ◽  
Vol 1142 (1-2) ◽  
pp. 36-42 ◽  
Author(s):  
Chiemi Araga ◽  
Kozo Akabori ◽  
Jun Sasaki ◽  
Akio Maeda ◽  
Takashi Shiina ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Primary Quinone Acceptor ◽  
Quinone Acceptor
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