From water to oxygen and back again: mechanistic similarities in the enzymatic redox conversions between water and dioxygen.

@article{Hoganson1998FromWT,
  title={From water to oxygen and back again: mechanistic similarities in the enzymatic redox conversions between water and dioxygen.},
  author={Curt W Hoganson and Michelle A. Pressler and Denis A. Proshlyakov and Gerald T. Babcock},
  journal={Biochimica et biophysica acta},
  year={1998},
  volume={1365 1-2},
  pages={170-4}
}
We propose that the interconversions of water and oxygen are catalyzed by the transition metal ions of Photosystem II and cytochrome c oxidase in remarkably similar ways. Oxygen-oxygen bond formation and cleavage occurs between two oxygen atoms that are bound as terminal ligands to two redox-active metal ions. Hydrogen atom transfer to or from a tyrosine residue is an essential component of the processes in both enzymes.