Stabilization of photosystem two dimers by phosphorylation: implication for the regulation of the turnover of D1 protein

FEBS Letters
O KruseJ Barber

Abstract

A general feature of many membrane protein complexes is that they have oligomeric organisation in vivo. Photosystem II (PSII) is one such example and the possible functional significance of this is explored in this work. Monomeric and dimeric forms of the core complex of PSII have been isolated from non-phosphorylated and phosphorylated thylakoid membranes prepared from spinach. These complexes had the same complement of proteins including, D1 (PsbA), D2 (PsbD), alpha-(PsbE) and beta-(PsbF) subunits of cytochrome b559, CP47 (PsbB), CP43 (PsbC), 33 kDa (PsbO) extrinsic protein and some other smaller subunits, such as PsbH, but did not contain Cab proteins. D1, D2, CP43 and PsbH were the phosphorylated components. Whether phosphorylated or not, the dimeric form of the PSII complex was more stable than the monomeric form. However, when treated with photoinhibitory light the isolated dimers converted to monomers in their non-phosphorylated state but not when phosphorylated. Phosphorylation, however, did not prevent photoinhibition as judged by the loss of oxygen evolving activity. A model is suggested for the role of PSII phosphorylation in controlling the conversion of dimeric PSII to its monomeric form and in this way regulate th...Continue Reading

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Citations

Sep 30, 2008·Photosynthesis Research·Alexander G IvanovNorman P A Huner
Aug 18, 2000·Biochimie·Y Choquet, O Vallon
Mar 6, 1999·Current Opinion in Plant Biology·A V VenerB Andersson
Mar 11, 2003·Antioxidants & Redox Signaling·Eva-Mari Aro, Itzhak Ohad
Nov 20, 2002·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·J Barber, J Nield
Jun 20, 2013·Journal of Proteomics·Martin ČernýBřetislav Brzobohatý
Aug 27, 2010·Journal of Integrative Plant Biology·Zhao-Gai WangChun-Hong Yang
Feb 12, 2004·Biochimica Et Biophysica Acta·Lan-Xin Shi, Wolfgang P Schröder
Dec 29, 2004·Biochimica Et Biophysica Acta·Jan P Dekker, Egbert J Boekema
Dec 11, 2014·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Wasilewska WioletaRomanowska Elżbieta
Jan 10, 2014·Journal of the American Chemical Society·Hongsik YoonWoo-Dong Jang
Feb 29, 2000·The Journal of Biological Chemistry·O KruseJ Barber
Mar 7, 2001·Plant & Cell Physiology·Y Yamamoto
Nov 25, 2005·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Eira KanervoEva-Mari Aro
Jan 31, 1998·The Journal of Biological Chemistry·J SharmaJ Barber
Aug 7, 1998·Biochimica Et Biophysica Acta·J Barber
Apr 27, 1999·Biochimica Et Biophysica Acta·F A WollmanR Nechushtai

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