Evidence for a direct manganese-oxygen ligand in water binding to the S2 state of the photosynthetic water oxidation complex

被引：23

作者：

Evans, MCW

Nugent, JHA

Ball, RJ

Muhiuddin, I

Pace, RJ

机构：

[1] UCL, Dept Biol, London WC1E 6BT, England

[2] Australian Natl Univ, Fac Sci, Dept Chem, Canberra, ACT 0200, Australia

来源：

BIOCHEMISTRY | 2004年 / 43卷 / 04期

关键词：

D O I：

10.1021/bi035489y

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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 (H2O)-O-17. The spectra show interaction of the O-17 with the preparation in the S-2 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 Mn-III center in a coupled Mn cluster.

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页码：989 / 994

页数：6

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