A functional model for O-O bond formation by the O2-evolving complex in photosystem II

被引：635

作者：

Limburg, J

Vrettos, JS

Liable-Sands, LM

Rheingold, AL

Crabtree, RH

Brudvig, GW

机构：

[1] Yale Univ, Dept Chem, New Haven, CT 06520 USA

[2] Univ Delaware, Dept Chem, Crystallog Lab, Newark, DE 19716 USA

来源：

SCIENCE | 1999年 / 283卷 / 5407期

关键词：

D O I：

10.1126/science.283.5407.1524

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The formation of molecular oxygen from water in photosynthesis is catalyzed by photosystem II at an active site containing four manganese ions that are arranged in di-mu-oxo dimanganese units (where mu is a bridging mode). The complex [H2O(terpy)Mn(O)(2)Mn(terpy)OH2](NO3)(3) (terpy is 2,2':6',2 "-terpyridine), which was synthesized and structurally characterized, contains a di-mu-oxo manganese dimer and catalyzes the conversion of sodium hypochlorite to molecular oxygen. Oxygen-18 isotope labeling showed that water is the source of the oxygen atoms in the molecular oxygen evolved, and so this system is a functional model for photosynthetic water oxidation.

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页码：1524 / 1527

页数：4

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