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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/eraa074
|2 doi
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|a pubmed24n1021.xml
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|a (DE-627)NLM306546620
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|a (NLM)32060533
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Bolte, Susanne
|e verfasserin
|4 aut
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|a Dynamics of the localization of the plastid terminal oxidase inside the chloroplast
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 14.05.2021
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|a Date Revised 31.05.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a The plastid terminal oxidase (PTOX) is a plastohydroquinone:oxygen oxidoreductase that shares structural similarities with alternative oxidases (AOXs). Multiple roles have been attributed to PTOX, such as involvement in carotene desaturation, a safety valve function, participation in the processes of chlororespiration, and setting the redox poise for cyclic electron transport. PTOX activity has been previously shown to depend on its localization at the thylakoid membrane. Here we investigate the dynamics of PTOX localization dependent on the proton motive force. Infiltrating illuminated leaves with uncouplers led to a partial dissociation of PTOX from the thylakoid membrane. In vitro reconstitution experiments showed that the attachment of purified recombinant maltose-binding protein (MBP)-OsPTOX to liposomes and isolated thylakoid membranes was strongest at slightly alkaline pH values in the presence of lower millimolar concentrations of KCl or MgCl2. In Arabidopsis thaliana overexpressing green fluorescent protein (GFP)-PTOX, confocal microscopy images showed that PTOX formed distinct spots in chloroplasts of dark-adapted or uncoupler-treated leaves, while the protein was more equally distributed in a network-like structure in the light. We propose a dynamic PTOX association with the thylakoid membrane depending on the presence of a proton motive force
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Alternative electron transport
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|a chloroplast
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|a confocal microscopy
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|a liposomes
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|a membrane association
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|a plastid terminal oxidase
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|a Oxidoreductases
|2 NLM
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|a EC 1.-
|2 NLM
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| 700 |
1 |
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|a Marcon, Elodie
|e verfasserin
|4 aut
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| 700 |
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|a Jaunario, Mélanie
|e verfasserin
|4 aut
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| 700 |
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|a Moyet, Lucas
|e verfasserin
|4 aut
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| 700 |
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|a Paternostre, Maité
|e verfasserin
|4 aut
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| 700 |
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|a Kuntz, Marcel
|e verfasserin
|4 aut
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|a Krieger-Liszkay, Anja
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 71(2020), 9 vom: 09. Mai, Seite 2661-2669
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:71
|g year:2020
|g number:9
|g day:09
|g month:05
|g pages:2661-2669
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|u http://dx.doi.org/10.1093/jxb/eraa074
|3 Volltext
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|d 71
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