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|a 10.1093/jxb/erad116
|2 doi
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|a pubmed24n1183.xml
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|a (DE-627)NLM354928848
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|a (NLM)36987927
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|a DE-627
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|a eng
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|a Förster, Britta
|e verfasserin
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|a The Chlamydomonas reinhardtii chloroplast envelope protein LCIA transports bicarbonate in planta
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|c 2023
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 29.06.2023
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|a Date Revised 29.06.2023
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|a published: Print
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|a CommentIn: J Exp Bot. 2023 Jun 27;74(12):3402-3405. - PMID 37369104
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|a Citation Status MEDLINE
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|a © The Author(s) 2023. 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 LCIA (low CO2-inducible protein A) is a chloroplast envelope protein associated with the CO2-concentrating mechanism of the green alga Chlamydomonas reinhardtii. LCIA is postulated to be a HCO3- channel, but previous studies were unable to show that LCIA was actively transporting bicarbonate in planta. Therefore, LCIA activity was investigated more directly in two heterologous systems: an Escherichia coli mutant (DCAKO) lacking both native carbonic anhydrases and an Arabidopsis mutant (βca5) missing the plastid carbonic anhydrase βCA5. Neither DCAKO nor βca5 can grow in ambient CO2 conditions, as they lack carbonic anhydrase-catalyzed production of the necessary HCO3- concentration for lipid and nucleic acid biosynthesis. Expression of LCIA restored growth in both systems in ambient CO2 conditions, which strongly suggests that LCIA is facilitating HCO3- uptake in each system. To our knowledge, this is the first direct evidence that LCIA moves HCO3- across membranes in bacteria and plants. Furthermore, the βca5 plant bioassay used in this study is the first system for testing HCO3- transport activity in planta, an experimental breakthrough that will be valuable for future studies aimed at improving the photosynthetic efficiency of crop plants using components from algal CO2-concentrating mechanisms
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a βca5
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|a Bicarbonate transport
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|a CCM
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|a DCAKO
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|a LCIA
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|a carbonic anhydrase
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|a photosynthesis
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|a Bicarbonates
|2 NLM
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|a Carbon Dioxide
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|a 142M471B3J
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|a Carbonic Anhydrases
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|a EC 4.2.1.1
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|a Rourke, Loraine M
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|a Weerasooriya, Hiruni N
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|a Pabuayon, Isaiah C M
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|a Rolland, Vivien
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|a Stuart-Williams, Hilary
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|a Badger, Murray R
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|a Price, G Dean
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|a Moroney, James V
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 74(2023), 12 vom: 27. Juni, Seite 3651-3666
|w (DE-627)NLM098182706
|x 1460-2431
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|g volume:74
|g year:2023
|g number:12
|g day:27
|g month:06
|g pages:3651-3666
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|u http://dx.doi.org/10.1093/jxb/erad116
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