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HILIC- and SCX-based quantitative proteomics of Chlamydomonas reinhardtii during nitrogen starvation induced lipid and carbohydrate accumulation.
LONGWORTH, Joseph; Noirel, Josselin; Pandhal, Jagroop et al.
2012In Journal of Proteome Research, 11 (12), p. 5959 - 5971
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Keywords :
Culture Media; Plant Proteins; Proteome; Carbon; Nitrogen; Carbon/metabolism; Cell Wall/metabolism; Chlamydomonas reinhardtii/growth & development; Chlamydomonas reinhardtii/metabolism; Chromatography, Ion Exchange/methods; Culture Media/metabolism; Energy Metabolism; Nitrogen/metabolism; Photophosphorylation; Photosynthesis; Plant Proteins/analysis; Plant Proteins/metabolism; Proteome/analysis; Proteome/metabolism; Proteomics/methods; Sequence Analysis, Protein; Stress, Physiological; Time Factors; Carbohydrate Metabolism; Lipid Metabolism; biofuels; carbohydrate production; Chlamydomonas; HILIC; iTRAQ; lipid production; quantitative proteomics; SCX; Biochemistry; Chemistry (all); General Chemistry
Abstract :
[en] Nitrogen starvation induced changes in carbohydrate and lipid content is described in several algal species. Although these phenotypic changes are desirable, such manipulations also significantly deteriorate culture health, ultimately halting growth. To optimize biofuel production from algae, it is desirable to induce lipid accumulation without compromising cell growth and survival. In this study, we utilized an 8-plex iTRAQ-based proteomic approach to assess the model alga Chlamydomonas reinhardtii CCAP 11/32CW15+ under nitrogen starvation. First-dimension fractionation was conducted using HILIC and SCX. A total of 587 proteins were identified (≥3 peptides) of which 71 and 311 were differentially expressed at significant levels (p<0.05), during nitrogen stress induced carbohydrate and lipid production, respectively. Forty-seven percent more changes with significance were observed with HILIC compared to SCX. Several trends were observed including increase in energy metabolism, decrease in translation machinery, increase in cell wall production and a change of balance between photosystems I and II. These findings point to a severely compromised system where lipid is accumulated at the expense of normal functioning of the organism, suggesting that a more informed and controlled method of lipid induction than gross nutrient manipulation would be needed for development of sustainable processes.
Disciplines :
Biotechnology
Author, co-author :
LONGWORTH, Joseph  ;  ChELSI Institute, Department of Chemical and Biological Engineering, The University of Sheffield, Mappin Street, Sheffield, S1 3JD, United Kingdom
Noirel, Josselin;  ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom
Pandhal, Jagroop;  ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom
Wright, Phillip C;  ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom
Vaidyanathan, Seetharaman;  ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom
External co-authors :
yes
Language :
English
Title :
HILIC- and SCX-based quantitative proteomics of Chlamydomonas reinhardtii during nitrogen starvation induced lipid and carbohydrate accumulation.
Publication date :
07 December 2012
Journal title :
Journal of Proteome Research
ISSN :
1535-3893
eISSN :
1535-3907
Publisher :
American Chemical Society (ACS), United States
Volume :
11
Issue :
12
Pages :
5959 - 5971
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 19 December 2023

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