2020
Unique organization of photosystem II supercomplexes and megacomplexes in Norway spruce
KOURIL, R., L. NOSEK, M. OPATIKOVA, R. ARSHAD, D.A. SEMCHONOK et. al.Základní údaje
Originální název
Unique organization of photosystem II supercomplexes and megacomplexes in Norway spruce
Autoři
KOURIL, R., L. NOSEK, M. OPATIKOVA, R. ARSHAD, D.A. SEMCHONOK, I. CHAMRAD, R. LENOBEL, E.J. BOEKEMA a P. ILIK
Vydání
Plant Journal, Hoboken, Wiley, 2020, 0960-7412
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10611 Plant sciences, botany
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 6.417
Kód RIV
RIV/00216224:14740/20:00121451
Organizační jednotka
Středoevropský technologický institut
UT WoS
000557081500001
Klíčová slova anglicky
clear native polyacrylamide electrophoresis; Picea abies; Pinus sylvestris; photosystem II; megacomplex; supercomplex; single-particle electron microscopy; grana membrane
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 29. 4. 2021 12:20, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
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.
Návaznosti
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