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Evidence for a Direct Manganese-Oxygen Ligand in Water Binding to the S 2 State of the Photosynthetic Water Oxidation Complex

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Date

2004

Authors

Evans, M C W
Nugent, J H A
Ball, R J
Muhiuddin, I
Pace, Ronald

Journal Title

Journal ISSN

Volume Title

Publisher

American Chemical Society

Abstract

The interaction of water with the water oxidizing Mn complex of photosystem II has been investigated using electron spin-echo envelope modulation spectroscopy in the presence of H217O. The spectra show interaction of the 17O with the preparation in the S2 state induced by 200 K illumination. The modulation is observed only in the center of the multiline spectrum. The inferred hyperfine coupling terms are compatible with water (not hydroxyl) oxygen bound to a particular quasi-axial MnIII center in a coupled Mn cluster.

Description

Keywords

Keywords: Lighting; Oxidation; Oxygen; Photosynthesis; Spectroscopic analysis; Water; Multiline spectrum; Biochemistry; hydroxyl group; ligand; manganese; oxygen; oxygen 17; water; article; chemical binding; electron spin resonance; illumination; molecular interact

Citation

URI

http://hdl.handle.net/1885/88673

Collections

ANU Research Publications

Source

Biochemistry

Type

Journal article

Book Title

Entity type

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DOI

Restricted until

2037-12-31

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