ESE RELAXATION MEASUREMENTS IN PHOTOSYSTEM-II - THE INFLUENCE OF THE REACTION CENTER NONHEME IRON ON THE SPIN-LATTICE RELAXATION OF TYR-D

被引：8

作者：

BOSCH, MK

EVELO, RG

STYRING, S

RUTHERFORD, AW

HOFF, AJ

机构：

[1] LEIDEN UNIV,HUYGENS LAB,DEPT BIOPHYS,POB 9504,2300 RA LEIDEN,NETHERLANDS

[2] UNIV STOCKHOLM,ARRHENIUS LAB,DEPT BIOCHEM,S-10691 STOCKHOLM,SWEDEN

[3] CENS,DEPT BIOL CELLULAIRE & MOLEC,F-91191 GIF SUR YVETTE,FRANCE

来源：

FEBS LETTERS | 1991年 / 292卷 / 1-2期

关键词：

PHOTOSYNTHESIS; PHOTOSYSTEM-II; OXYGEN EVOLVING COMPLEX; MANGANESE; ADRY-AGENT; ELECTRON SPIN ECHO SPECTROSCOPY;

D O I：

10.1016/0014-5793(91)80884-6

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 spin-lattice relaxation of the tyrosine radical D in Photosystem II particles was studied at 4.2 K in samples in which flash-induced oscillations of the oxidation state of the Mn-cluster of the oxygen evolving system were abolished by addition of ANT2P, leaving Fe2+/Fe3+ oscillations intact. Samples subjected to 0, 1 or 2 light-flashes all showed the same relaxation kinetics. No period-2 oscillation in the spin-lattice relaxation corresponding to the Fe2+/Fe3+-oscillation was observed. Thus the T1-oscillations of D as a function of flash number in untreated samples are solely caused by the charge-oscillations of the Mn-cluster (1989, Biochim. Biophys. Acta 973, 428-442).

引用

页码：279 / 283

页数：5

共 20 条

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