Photosynthetic oxygen evolution: H/D isotope effects and the coupling between electron and proton transfer during the redox reactions at the oxidizing side of Photosystem II

@article{Haumann2004PhotosyntheticOE,
  title={Photosynthetic oxygen evolution: H/D isotope effects and the coupling between electron and proton transfer during the redox reactions at the oxidizing side of Photosystem II},
  author={Michael Haumann and Oliver B{\"o}gershausen and Dmitry A Cherepanov and Ralf Ahlbrink and Wolfgang Junge},
  journal={Photosynthesis Research},
  year={2004},
  volume={51},
  pages={193-208}
}
The oxygen evolving complex (OEC) of Photosystem II (PS II) incorporates a Mn-cluster and probably a further redox cofactor, X. Four quanta of light drive the OEC through the increasingly oxidized states S0 ⇒ S1 ⇒ S2 ⇒ S3 ⇒ S4 to yield O2 during the transition S4 → S0. It has been speculated that the oxidation of water might be kinetically facilitated by the abstraction of hydrogen. This implied that the respective electron acceptor is deprotonated upon oxidation. Whether YZ and X fulfill this… CONTINUE READING
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