Shape-shifting tetranuclear oxo-bridged manganese cluster: relevance to photosystem II water oxidase active site
| Autor: | William H. Armstrong, Sumitra Mukhopadhyay, Henry J. Mok, Richard J. Staples |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Photosystem II
Stereochemistry chemistry.chemical_element Manganese Crystallography X-Ray Biochemistry Redox Catalysis law.invention Colloid and Surface Chemistry law Electron paramagnetic resonance Oxidase test Binding Sites biology Electron Spin Resonance Spectroscopy Active site Photosystem II Protein Complex Water Bioinorganic chemistry General Chemistry biology.organism_classification Kinetics chemistry biology.protein Tetra Oxidoreductases |
| Zdroj: | Journal of the American Chemical Society. 126(30) |
| ISSN: | 0002-7863 |
| Popis: | The redox properties of the "dimer-of-dimers" complex, [{Mn2(mu-O)2(tphpn)}2]4+ (1) (where Htphpn = N,N,N',N'-tetra(2-methylpyridyl)-2-hydroxypropane-diamine) were investigated. The structure changes dramatically to an adamantane-shaped core upon one-electron oxidation. On the other hand, the one-electron reduced product of 1, [Mn4O4(tphpn)2]3+, exhibits a hyperfine-structured multiline EPR signal very similar to the so-called S0 state of the tetramanganese cluster, which resides at the Photosystem II water oxidase active site. |
| Databáze: | OpenAIRE |
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