Structural changes in the S(3) state of the oxygen evolving complex in photosystem II

The S(3) state of the Mn(4) CaO(5) -cluster in photosystem II was investigated by DFT calculations and compared with EXAFS data. Considering previously proposed mechanism; a water molecule is inserted into an open coordination site of Mn upon S(2) to S(3) transition that becomes a substrate water, w...

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Detalles Bibliográficos
Autores principales: Hatakeyama, Makoto, Ogata, Koji, Fujii, Katsushi, Yachandra, Vittal K., Yano, Junko, Nakamura, Shinichiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6013076/
https://www.ncbi.nlm.nih.gov/pubmed/29937550
http://dx.doi.org/10.1016/j.cplett.2016.03.010
Descripción
Sumario:The S(3) state of the Mn(4) CaO(5) -cluster in photosystem II was investigated by DFT calculations and compared with EXAFS data. Considering previously proposed mechanism; a water molecule is inserted into an open coordination site of Mn upon S(2) to S(3) transition that becomes a substrate water, we examined if the water insertion is essential for the S(3) formation, or if one cannot eliminate other possible routes that do not require a water insertion at the S(3) stage. The novel S(3) state structure consisting of only short 2.7–2.8 Å Mn—Mn distances was discussed.

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