Dynamic Metabolic Footprinting Reveals the Key Components of Metabolic Network in Yeast Saccharomyces cerevisiae

Metabolic footprinting offers a relatively easy approach to exploit the potentials of metabolomics for phenotypic characterization of microbial cells. To capture the highly dynamic nature of metabolites, we propose the use of dynamic metabolic footprinting instead of the traditional method which rel...

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Bibliographic Details
Published in:International journal of genomics 2014-01, Vol.2014 (2014), p.1-14
Main Authors: Chumnanpuen, Pramote, Hansen, Michael Adsetts Edberg, Smedsgaard, Jørn, Nielsen, Jens
Format: Article
Language:English
Subjects:
Biosynthesis
Carbon
Colleges & universities
Correlation analysis
Data analysis
Ethanol
Glucose
Glycerol
Metabolism
Metabolites
Saccharomyces cerevisiae
Scientific imaging
Yeast
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Summary:Metabolic footprinting offers a relatively easy approach to exploit the potentials of metabolomics for phenotypic characterization of microbial cells. To capture the highly dynamic nature of metabolites, we propose the use of dynamic metabolic footprinting instead of the traditional method which relies on analysis at a single time point. Using direct infusion-mass spectrometry (DI-MS), we could observe the dynamic metabolic footprinting in yeast S. cerevisiae BY4709 (wild type) cultured on 3 different C-sources (glucose, glycerol, and ethanol) and sampled along 10 time points with 5 biological replicates. In order to analyze the dynamic mass spectrometry data, we developed the novel analysis methods that allow us to perform correlation analysis to identify metabolites that significantly correlate over time during growth on the different carbon sources. Both positive and negative electrospray ionization (ESI) modes were performed to obtain the complete information about the metabolite content. Using sparse principal component analysis (Sparse PCA), we further identified those pairs of metabolites that significantly contribute to the separation. From the list of significant metabolite pairs, we reconstructed an interaction map that provides information of how different metabolic pathways have correlated patterns during growth on the different carbon sources.
ISSN:2314-436X
2314-4378
2314-4378
DOI:10.1155/2014/894296