2021
Towards spruce-type photosystem II: consequences of the loss of light-harvesting proteins LHCB3 and LHCB6 in Arabidopsis
ILÍKOVÁ, Iva, Petr ILÍK, Monika OPATÍKOVÁ, Rameez ARSHAD, Lukáš NOSEK et. al.Základní údaje
Originální název
Towards spruce-type photosystem II: consequences of the loss of light-harvesting proteins LHCB3 and LHCB6 in Arabidopsis
Autoři
ILÍKOVÁ, Iva (203 Česká republika), Petr ILÍK (203 Česká republika), Monika OPATÍKOVÁ (203 Česká republika), Rameez ARSHAD (528 Nizozemské království), Lukáš NOSEK (203 Česká republika), Václav KARLICKÝ (203 Česká republika), Zuzana KUČEROVÁ (203 Česká republika), Pavel ROUDNICKÝ (203 Česká republika, garant, domácí), Pavel POSPÍŠIL (203 Česká republika), Dušan LAZÁR (203 Česká republika), Jan BARTOŠ (203 Česká republika) a Roman KOUŘIL (203 Česká republika)
Vydání
Plant Physiology, American Society of Plant Physiologists, 2021, 0032-0889
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: 8.005
Kód RIV
RIV/00216224:14740/21:00123926
Organizační jednotka
Středoevropský technologický institut
UT WoS
000733403700059
Klíčová slova anglicky
EXCITATION-ENERGY TRANSFERTHYLAKOID MEMBRANESCHLOROPHYLL FLUORESCENCEGRANA MEMBRANESCIRCULAR-DICHROISMELECTRON-TRANSPORTDYNAMIC REORGANIZATIONMACRO-ORGANIZATIONNORWAY SPRUCEMINOR ANTENNA
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 2. 11. 2024 20:57, Ing. Martina Blahová
Anotace
V originále
The largest stable photosystem II (PSII) supercomplex in land plants (C2S2M2) consists of a core complex dimer (C-2), two strongly (S-2) and two moderately (M-2) bound light-harvesting protein (LHCB) trimers attached to C-2 via monomeric antenna proteins LHCB4-6. Recently, we have shown that LHCB3 and LHCB6, presumably essential for land plants, are missing in Norway spruce (Picea abies), which results in a unique structure of its C2S2M2 supercomplex. Here, we performed structure-function characterization of PSII supercomplexes in Arabidopsis (Arabidopsis thaliana) mutants lhcb3, lhcb6, and lhcb3 Ihcb6 to examine the possibility of the formation of the "spruce-type" PSII supercomplex in angiosperms. Unlike in spruce, in Arabidopsis both LHCB3 and LHCB6 are necessary for stable binding of the M trimer to PSII core. The "spruce-type" PSII supercomplex was observed with low abundance only in the Ihcb3 plants and its formation did not require the presence of LHCB4.3, the only LHCB4-type protein in spruce. Electron microscopy analysis of grana membranes revealed that the majority of PSII in lhcb6 and namely in lhcb3 lhcb6 mutants were arranged into C2S2 semi-crystalline arrays, some of which appeared to structurally restrict plastoquinone diffusion. Mutants without LHCB6 were characterized by fast induction of non-photochemical quenching and, on the contrary to the previous lhcb6 study, by only transient slowdown of electron transport between PSII and PSI. We hypothesize that these functional changes, associated with the arrangement of PSII into C2S2 arrays in thylakoids, may be important for the photoprotection of both PSI and PSII upon abrupt high-light exposure.
Návaznosti
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