Core protein phosphorylation facilitates the repair of photodamaged photosystem II at high light

被引：166

作者：

Tikkanen, Mikko ^{[1
]}

Nurmi, Markus ^{[1
]}

Kangasjarvi, Saijaliisa ^{[1
]}

Aro, Eva-Mari ^{[1
]}

机构：

[1] Univ Turku, Dept Biol, FIN-20014 Turku, Finland

来源：

BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS | 2008年 / 1777卷 / 11期

基金：

芬兰科学院;

关键词：

Photosystem II; Photoinhibition; Protein phosphorylation; stn mutant; D1; protein; Arabidopsis thaliana;

D O I：

10.1016/j.bbabio.2008.08.004

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：

Phosphorylation of photosystem II (PSII) reaction center protein D1 has been hypothesised to function as a signal for the migration of photodamaged PSII core complex from grana membranes to stroma lamellae for concerted degradation and replacement of the photodamaged D1 protein. Here, by using the mutants with impaired capacity (stn8) or complete lack (stn7 stn8) in phosphorylation of PSII core proteins, the role of phosphorylation in PSII photodamage and repair was investigated. We show that the lack of PSII core protein phosphorylation disturbs the disassembly of PSII supercomplexes at high light, which is a prerequisite for efficient migration of damaged PSII complexes from grana to stroma lamellae for repair. This results in accumulation of photodamaged PSII complexes, which in turn results, upon prolonged exposure to high light (HL), in general oxidative damage of photosynthetic proteins in the thylakoid membrane. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1432 / 1437

页数：6

共 29 条

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