Metabolome analysis: Casaminoacids versus D-Glc

e:Bio - Innovations Competition Systems Biology

Within the e:Bio - Innovationswettbewerb Systembiologie (Federal Ministry of Education and Research (BMBF)), the SulfoSYSBIOTECH consortium (10 partners), aim to unravel the complexity and regulation of the carbon metabolic network of the thermoacidophilic archaeon Sulfolobus solfataricus (optimal growth at 80°C and pH 3) in order to provide new catalysts ‘extremozymes’ for utilization in White Biotechnology.

Based on the available S. solfataricus genome scale metabolic model (Ulas et al., 2012) ...

Integrated systems biology approach including transcriptome, metabolome, proteome analyses and modelling to elucidate amino acid degradation in S. solfataricus P2.

To investigate amino acid degradation pathways in Sulfolobus solfataricus transcriptome, proteome and metabolome analyses were performed on cells grown on caseinhydrolysate as carbon source. Cells grown with glucose served as reference condition. Metabolic modelling was used to compare the efficiency of different degradation routes.

Cells of S. solfataricus were grown on either caseinhydrolysate or D-glucose (reference) as sole carbon source.

The calculation of amino acid uptake rates for cells of Sulfolobus solfataricus P2 grown on caseinhydrolysate was performed based on the relative consumption of individual amino acids from the growth medium and the previously published absolute concentration of amino acids in the used growth medium.

Sulfolobus solfataricus P2 was cultivated on 1 % Caseinhydrolysate. Samples of the culture supernatants were taken at regular intervalls and analyzed by GC-MS. To evaluate the stability of amino acids under cultivation conditions an additional non-inoculated control culture was also analyzed.

Intracellular metabolome analysis of S. solfataricus P2 grown on caseinhydrolysate or D-glucose as sole carbon source. Samples were analyzed with GC-MS. CoA derivatives were analyzed with LC-MS.