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@article{1762517, author = {Kouril, R. and Nosek, L. and Opatikova, M. and Arshad, R. and Semchonok, D.A. and Chamrad, I. and Lenobel, R. and Boekema, E.J. and Ilik, P.}, article_location = {Hoboken}, article_number = {1}, doi = {http://dx.doi.org/10.1111/tpj.14918}, keywords = {clear native polyacrylamide electrophoresis; Picea abies; Pinus sylvestris; photosystem II; megacomplex; supercomplex; single-particle electron microscopy; grana membrane}, language = {eng}, issn = {0960-7412}, journal = {Plant Journal}, title = {Unique organization of photosystem II supercomplexes and megacomplexes in Norway spruce}, url = {https://onlinelibrary.wiley.com/doi/10.1111/tpj.14918}, volume = {104}, year = {2020} }
TY - JOUR ID - 1762517 AU - Kouril, R. - Nosek, L. - Opatikova, M. - Arshad, R. - Semchonok, D.A. - Chamrad, I. - Lenobel, R. - Boekema, E.J. - Ilik, P. PY - 2020 TI - Unique organization of photosystem II supercomplexes and megacomplexes in Norway spruce JF - Plant Journal VL - 104 IS - 1 SP - 215-225 EP - 215-225 PB - Wiley SN - 09607412 KW - clear native polyacrylamide electrophoresis KW - Picea abies KW - Pinus sylvestris KW - photosystem II KW - megacomplex KW - supercomplex KW - single-particle electron microscopy KW - grana membrane UR - https://onlinelibrary.wiley.com/doi/10.1111/tpj.14918 N2 - Photosystem II (PSII) complexes are organized into large supercomplexes with variable amounts of light-harvesting proteins (Lhcb). A typical PSII supercomplex in plants is formed by four trimers of Lhcb proteins (LHCII trimers), which are bound to the PSII core dimer via monomeric antenna proteins. However, the architecture of PSII supercomplexes in Norway spruce[Picea abies(L.) Karst.] is different, most likely due to a lack of two Lhcb proteins, Lhcb6 and Lhcb3. Interestingly, the spruce PSII supercomplex shares similar structural features with its counterpart in the green algaChlamydomonas reinhardtii[Kourilet al. (2016)New Phytol.210, 808-814]. Here we present a single-particle electron microscopy study of isolated PSII supercomplexes from Norway spruce that revealed binding of a variable amount of LHCII trimers to the PSII core dimer at positions that have never been observed in any other plant species so far. The largest spruce PSII supercomplex, which was found to bind eight LHCII trimers, is even larger than the current largest known PSII supercomplex fromC. reinhardtii. We have also shown that the spruce PSII supercomplexes can form various types of PSII megacomplexes, which were also identified in intact grana membranes. Some of these large PSII supercomplexes and megacomplexes were identified also inPinus sylvestris, another representative of the Pinaceae family. The structural variability and complexity of LHCII organization in Pinaceae seems to be related to the absence of Lhcb6 and Lhcb3 in this family, and may be beneficial for the optimization of light-harvesting under varying environmental conditions. ER -
KOURIL, R., L. NOSEK, M. OPATIKOVA, R. ARSHAD, D.A. SEMCHONOK, I. CHAMRAD, R. LENOBEL, E.J. BOEKEMA and P. ILIK. Unique organization of photosystem II supercomplexes and megacomplexes in Norway spruce. \textit{Plant Journal}. Hoboken: Wiley, 2020, vol.~104, No~1, p.~215-225. ISSN~0960-7412. Available from: https://dx.doi.org/10.1111/tpj.14918.
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