A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Core protein phosphorylation facilitates the repair of photodamaged photosystem II at high light
Tekijät: Tikkanen M, Nurmi M, Kangasjarvi S, Aro EM
Kustantaja: ELSEVIER SCIENCE BV
Julkaisuvuosi: 2008
Journal: BBA - Bioenergetics
Tietokannassa oleva lehden nimi: BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
Lehden akronyymi: BBA-BIOENERGETICS
Vuosikerta: 1777
Numero: 11
Aloitussivu: 1432
Lopetussivu: 1437
Sivujen määrä: 6
ISSN: 0005-2728
DOI: https://doi.org/10.1016/j.bbabio.2008.08.004
Tiivistelmä
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.
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.
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