PsbS enhances nonphotochemical fluorescence quenching in the absence of zeaxanthin

被引：73

作者：

Crouchman, S ^{[1
]}

Ruban, A ^{[1
]}

Horton, P ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England

来源：

FEBS LETTERS | 2006年 / 580卷 / 08期

基金：

英国生物技术与生命科学研究理事会;

关键词：

light-harvesting complex; thylakoid membrane; nonphotochemical quenching; photoprotection;

D O I：

10.1016/j.febslet.2006.03.005

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：

Leaves and chloroplasts from Arabidopsis plants with increased amounts of PsbS protein showed the same percentage increase in nonphotochemical quenching in comparison to the wild type both in the presence and absence of zeaxanthin. The absorption change at 525-535 nm was also more pronounced in both cases. It is suggested that PsbS alone can cause the quenching, supporting the model in which zeaxanthin acts as an allosteric activator and is not the primary cause of the process. It is proposed that PsbS acts as a trigger of the conformational change that leads to the establishment of nonphotochemical quenching. (c) 2006 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.

引用

页码：2053 / 2058

页数：6

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