Towards a critical understanding of the photosystem II repair mechanism and its regulation during stress conditions

: Nath K, Jajoo A, Poudyal RS, Timilsina R, Park YS, Aro EM, Nam HG, Lee CH

Publisher: ELSEVIER SCIENCE BV

: 2013

: FEBS Letters

: FEBS LETTERS

: FEBS LETT

: 21

: 587

: 21

: 3372

: 3381

: 10

: 0014-5793

DOI: https://doi.org/10.1016/j.febslet.2013.09.015

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 photo-damaged 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. (C) 2013 Federation of European Biochemical Societies. Published by Elsevier B. V. All rights reserved.