ARE THERE REALLY 4 MANGANESE IONS PER CENTER OF PHOTOSYNTHETIC WATER OXIDATION

被引：12

作者：

PAULY, S ^{[1
]}

WITT, HT ^{[1
]}

机构：

[1] TECH UNIV BERLIN,MAX VOLMER INST BIOPHYS & PHYS CHEM,STR DES 17 JUNI 135,W-1000 BERLIN 12,GERMANY

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1992年 / 1099卷 / 03期

关键词：

PHOTOSYNTHESIS; OXYGEN EVOLUTION; MANGANESE; (SYNECHOCOCCUS);

D O I：

10.1016/0005-2728(92)90029-2

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：

Manganese content and the amount of oxygen-evolving centres have determined for purified PS II complexes from the cyanobacterium Synechococcus sp. by atomic absorption and measurements of flash-induced oxygen yields, respectively. A stoichiometry of six manganese per oxygen-evolving centre was observed. This was found not only for PS II preparations with different activities of oxygen evolution, but also when deactivating treatments by low-salt or NH2OH incubation were carried out. Our results call into question the current thinking that four Mn ions are located in the water-oxidizing complex. A hexanuclear manganese model is discussed, instead.

引用

页码：211 / 218

页数：8

共 63 条

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