About: Architectural switch in plant photosynthetic membranes induced by light stress

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Unavoidable side reactions of photosynthetic energy conversion can damage the water-splitting photosystem II (PSII) holocomplex embedded in the thylakoid membrane system inside chloroplasts. Plant survival is crucially dependent on an efficient molecular repair of damaged PSII realized by a multistep repair cycle. The PSII repair cycle requires a brisk lateral protein traffic between stacked grana thylakoids and unstacked stroma lamellae that is challenged by the tight stacking and low protein mobility in grana. We demonstrated that high light stress induced two main structural changes that work synergistically to improve the accessibility between damaged PSII in grana and its repair machinery in stroma lamellae: lateral shrinkage of grana diameter and increased protein mobility in grana thylakoids. It follows that high light stress triggers an architectural switch of the thylakoid network that is advantageous for swift protein repair. Studies of the thylakoid kinase mutant stn8 and the double mutant stn7/8 demonstrate the central role of protein phosphorylation for the structural alterations. These findings are based on the elaboration of mathematical tools for analyzing confocal laser-scanning microscopic images to study changes in the sophisticated thylakoid architecture in intact protoplasts. Unavoidable side reactions of photosynthetic energy conversion can damage the water-splitting photosystem II (PSII) holocomplex embedded in the thylakoid membrane system inside chloroplasts. Plant survival is crucially dependent on an efficient molecular repair of damaged PSII realized by a multistep repair cycle. The PSII repair cycle requires a brisk lateral protein traffic between stacked grana thylakoids and unstacked stroma lamellae that is challenged by the tight stacking and low protein mobility in grana. We demonstrated that high light stress induced two main structural changes that work synergistically to improve the accessibility between damaged PSII in grana and its repair machinery in stroma lamellae: lateral shrinkage of grana diameter and increased protein mobility in grana thylakoids. It follows that high light stress triggers an architectural switch of the thylakoid network that is advantageous for swift protein repair. Studies of the thylakoid kinase mutant stn8 and the double mutant stn7/8 demonstrate the central role of protein phosphorylation for the structural alterations. These findings are based on the elaboration of mathematical tools for analyzing confocal laser-scanning microscopic images to study changes in the sophisticated thylakoid architecture in intact protoplasts. (en)
Title	Architectural switch in plant photosynthetic membranes induced by light stress Architectural switch in plant photosynthetic membranes induced by light stress (en)
skos:prefLabel	Architectural switch in plant photosynthetic membranes induced by light stress Architectural switch in plant photosynthetic membranes induced by light stress (en)
skos:notation	RIV/60076658:12310/12:43884199!RIV13-MSM-12310___
http://linked.open...avai/riv/aktivita	I V
http://linked.open...avai/riv/aktivity	I, V
http://linked.open...iv/cisloPeriodika	49
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Herbstová, Miroslava
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Jihočeská univerzita v Českých Budějovicích / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	123574
http://linked.open...ai/riv/idVysledku	RIV/60076658:12310/12:43884199
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	photosynthesis; macromolecular crowding; confocal microscopy (en)
http://linked.open.../riv/klicoveSlovo	macromolecular crowding confocal microscopy photosynthesis
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[D9E7A1EA2F10]
http://linked.open...i/riv/nazevZdroje	Proceedings of The National Academy of Sciences of The United States of America
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	109
http://linked.open...iv/tvurceVysledku	Herbstová, Miroslava Kinzel, Christopher Kirchhoff, Helmut Tietz, Stefanie Turkina, Maria V.
http://linked.open...ain/vavai/riv/wos	000312347200057
issn	0027-8424
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1073/pnas.1214265109
http://localhost/t...ganizacniJednotka	12310

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