Dynamic Changes in the Proteome of Synechocystis 6803 in Response to CO2 Limitation Revealed by Quantitative Proteomics
| Autor: | Natalia Vorontsova, Julia P. Vainonen, Eva-Mari Aro, Natalia Battchikova, Mika Keränen, Dalton Carmel |
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| Rok vydání: | 2010 |
| Předmět: |
Proteomics
Cyanobacteria Carbon metabolism Proteome Quantitative proteomics Computational biology Photosynthesis Biochemistry Bacterial Proteins Tandem Mass Spectrometry Botany skin and connective tissue diseases biology Synechocystis General Chemistry Limiting Carbon Dioxide biology.organism_classification Carbon Kinetics Gene Expression Regulation Photoprotection sense organs |
| Zdroj: | Journal of Proteome Research. 9:5896-5912 |
| ISSN: | 1535-3907 1535-3893 |
| Popis: | Cyanobacteria developed efficient carbon concentrating mechanisms which significantly improve the photosynthetic performance and survival of cells under limiting CO(2) conditions. Dynamic changes of the Synechocystis proteome to CO(2) limitation were investigated using shotgun LC-MS/MS approach with isobaric tag for relative and absolute quantification (iTRAQ) technique. Synechocystis cells grown at high (3%) CO(2) were shifted to air-level CO(2) followed by protein extraction after 6, 24, and 72 h. About 19% of the cyanobacterial proteome was identified and the expression changes were quantified for 17% of theoretical ORFs. For 76 proteins, up- or down-regulation was found to be significant (more than 1.5 or less than 0.7). Major changes were observed in proteins participating in inorganic carbon uptake, CO(2) fixation, nitrogen transport and assimilation, as well as in the protection of the photosynthetic machinery from excess of light. Further, a number of hypothetical proteins with unknown functions were discovered. In general, the cells appear to acclimate to low CO(2) without a significant stress since the stress-related molecular chaperones were down-regulated and only a minor decline was detected for proteins of phycobilisomes, photosynthetic complexes, and translation machinery. The results of iTRAQ experiment were validated by the Western blot analysis for selected proteins. |
| Databáze: | OpenAIRE |
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