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Towards a critical understanding of the photosystem II repair mechanism and its regulation during stress conditions
Author(s) -
Nath Krishna,
Jajoo Anjana,
Poudyal Roshan Sharma,
Timilsina Rupak,
Park Yu Shin,
Aro Eva-Mari,
Nam Hong Gil,
Lee C.-H.
Publication year - 2013
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2013.09.015
Subject(s) - photoinhibition , photoprotection , photosystem ii , dephosphorylation , thylakoid , microbiology and biotechnology , phosphorylation , biophysics , abiotic stress , photosystem i , biology , photosynthesis , chemistry , kinase , phosphatase , biochemistry , chloroplast , gene
Photosystem II (PSII) is vulnerable to high light (HL) illumination resulting in photoinhibition. In addition to photoprotection mechanisms, plants have developed an efficient PSII repair mechanism to save themselves from irreversible damage to PSII under abiotic stresses including HL illumination. The phosphorylation/dephosphorylation cycle along with subsequent degradation of photodamaged D1 protein to be replaced by the insertion of a newly synthesized copy of D1 into the PSII complex, is the core function of the PSII repair cycle. The exact mechanism of this process is still under discussion. We describe the recent progress in identifying the kinases, phosphatases and proteases, and in understanding their involvement in the maintenance of thylakoid structure and the quality control of proteins by PSII repair cycle during photoinhibition.