Electronic structure of the oxygen-evolving complex in photosystem II prior to O-O bond formation

Science ◽  
2014 ◽  
Vol 345 (6198) ◽  
pp. 804-808 ◽  
Author(s):  
N. Cox ◽  
M. Retegan ◽  
F. Neese ◽  
D. A. Pantazis ◽  
A. Boussac ◽  
...  
2012 ◽  
Vol 287 (29) ◽  
pp. 24721-24733 ◽  
Author(s):  
Thomas Lohmiller ◽  
Nicholas Cox ◽  
Ji-Hu Su ◽  
Johannes Messinger ◽  
Wolfgang Lubitz

2013 ◽  
Vol 1827 (3) ◽  
pp. 438-445 ◽  
Author(s):  
Mizue Asada ◽  
Hiroki Nagashima ◽  
Faisal Hammad Mekky Koua ◽  
Jian-Ren Shen ◽  
Asako Kawamori ◽  
...  

2017 ◽  
Vol 198 ◽  
pp. 83-106 ◽  
Author(s):  
Mitsuo Shoji ◽  
Hiroshi Isobe ◽  
Takahito Nakajima ◽  
Yasuteru Shigeta ◽  
Michihiro Suga ◽  
...  

Large-scale QM/MM calculations were performed to elucidate an optimized geometrical structure of a CaMn4O5 cluster with and without water insertion in the S3 state of the oxygen evolving complex (OEC) of photosystem II (PSII). The left (L)-opened structure was found to be stable under the assumption of no hydroxide anion insertion in the S3 state, whereas the right (R)-opened structure became more stable if one water molecule is inserted to the Mn4Ca cluster. The optimized Mna(4)–Mnd(1) distance determined by QM/MM was about 5.0 Å for the S3 structure without an inserted hydroxide anion, but this is elongated by 0.2–0.3 Å after insertion. These computational results are discussed in relation to the possible mechanisms of O–O bond formation in water oxidation by the OEC of PSII.


2014 ◽  
Vol 16 (17) ◽  
pp. 7799-7812 ◽  
Author(s):  
Lu Jin ◽  
Paul Smith ◽  
Christopher J. Noble ◽  
Rob Stranger ◽  
Graeme R. Hanson ◽  
...  

55Mn pulsed ENDOR of the oxygen evolving complex (S2 state) at 2.5 K indicates the presence of a MnIII3MnIV tetranuclear cluster.


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