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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erx121
|2 doi
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|a pubmed25n0906.xml
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|a (NLM)28520898
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a Mitchell, Madeline C
|e verfasserin
|4 aut
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|a Pyrenoid loss impairs carbon-concentrating mechanism induction and alters primary metabolism in Chlamydomonas reinhardtii
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 14.05.2018
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|a Date Revised 13.11.2018
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author 2017. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Carbon-concentrating mechanisms (CCMs) enable efficient photosynthesis and growth in CO2-limiting environments, and in eukaryotic microalgae localisation of Rubisco to a microcompartment called the pyrenoid is key. In the model green alga Chlamydomonas reinhardtii, Rubisco preferentially relocalises to the pyrenoid during CCM induction and pyrenoid-less mutants lack a functioning CCM and grow very poorly at low CO2. The aim of this study was to investigate the CO2 response of pyrenoid-positive (pyr+) and pyrenoid-negative (pyr-) mutant strains to determine the effect of pyrenoid absence on CCM induction and gene expression. Shotgun proteomic analysis of low-CO2-adapted strains showed reduced accumulation of some CCM-related proteins, suggesting that pyr- has limited capacity to respond to low-CO2 conditions. Comparisons between gene transcription and protein expression revealed potential regulatory interactions, since Rubisco protein linker (EPYC1) protein did not accumulate in pyr- despite increased transcription, while elements of the LCIB/LCIC complex were also differentially expressed. Furthermore, pyr- showed altered abundance of a number of proteins involved in primary metabolism, perhaps due to the failure to adapt to low CO2. This work highlights two-way regulation between CCM induction and pyrenoid formation, and provides novel candidates for future studies of pyrenoid assembly and CCM function
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbon-concentrating mechanism
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|a Chlamydomonas
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|a photosynthesis
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|a proteomics
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|a pyrenoid
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|a tandem mass spectrometry
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|a Algal Proteins
|2 NLM
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|a Carbon
|2 NLM
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|a 7440-44-0
|2 NLM
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|a Metodieva, Gergana
|e verfasserin
|4 aut
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|a Metodiev, Metodi V
|e verfasserin
|4 aut
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|a Griffiths, Howard
|e verfasserin
|4 aut
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|a Meyer, Moritz T
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 68(2017), 14 vom: 01. Juni, Seite 3891-3902
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:68
|g year:2017
|g number:14
|g day:01
|g month:06
|g pages:3891-3902
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|u http://dx.doi.org/10.1093/jxb/erx121
|3 Volltext
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|h 3891-3902
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