Repository » Data AccessID 117

Detail View - Data AccessID 117

Backimage Back

General Information info

Manuscript title Oxygen dependence of metabolic fluxes and energy generation of Saccharomyces cerevisiae CEN.PK113-1A
PubMed ID 18613954
Journal BMC Systems Biology
Year 2008
Authors Paula Jouhten, Eija Rintala, Anne Huuskonen, Anu Tamminen, Mervi Toivari, Marilyn Wiebe, Laura Ruohonen, Merja Penttilä and Hannu Maaheimo
Affiliations VTT Technical Research Centre of Finland, Espoo, Finland
Keywords Pentose Phosphate Pathway, Flux Distribution, Flux Ratio, Metabolic Flux Analysis, Central Carbon Metabolism
Full text article Downloadarticle Jouhten_2008.pdf
Project name not specified

Experiment Description info

Organism Saccharomyces cerevisiae
Strain CEN.PK113-1A
Data type flux measurements
Data units normalised to the specific glucose uptake rate
Execution date not specified

Experimental Details info

Temperature (0C) 30
pH 5.0
Carbon source glucose,
Culture mode chemostat
Process condition aerobic and anaerobic
Dilution rate (h-1) 0.1
Working volume (L) 2.5
Biomass concentration (g/L) see spreadsheet
Medium composition

Defined minimal medium [1], with 10 g glucose l-1 as carbon source, and supplemented with 10 mg ergosterol l-1 and 420 mg Tween 80 l-1 (a source of oleic acid).

General protocol information Flux analysis method: flux ratio, 13C constrained MFA

Platform: NMR

Methods description - Notes

The culture conditions and biomass determination and chemical and metabolite analyses are described in more detail by Wiebe et al. (2008) [2].
Biosynthetically directed fractional (BDF) 13C-labelling:
13C-labelling experiments were performed in at least two replicate cultures under each oxygenation condition. After reaching a metabolic steady state, as determined by constant physiological parameters including biomass production, carbon dioxide evolution and oxygen uptake rates (CER and OUR), alkali utilisation, and subsequently confirmed by the observation of constant extracellular and intracellular metabolites and gene transcription, 10% of the carbon source in the medium was replaced with [U-13C]glucose (Isotec, 99 atom% 13C). During steady state growth the active pathways in the cells will determine how the yeast biomass becomes 13C-labelled. After approximately 1.5 residence times biomass samples, 50 ml of culture broth, corresponding to 0.27 to 0.05 g CDW, were harvested by centrifugation. The cell pellets were suspended into 10 ml of 6 M HCl and the biomass was hydrolysed in sealed glass tubes at 110°C for 22 h. The suspensions were dried and dissolved in H2O for filtration through 0.2 μm filters. The filtrates were vacuum-dried and dissolved in D2O for NMR experiments. The pH of the samples was below 1 due to residual HCl.
As described previously [3, 4, 5, 6, 7, 8, 9], the calculation of metabolic flux ratios when using fractional 13C-labelling of amino acids is based on the assumption that both a metabolic and an isotopomeric steady state exist. To establish a cost-effective protocol for a larger number of 13C-labelling experiments, 13C-labelled substrate was fed to a chemostat operating in a metabolic steady state for the duration of 1.5 volume changes [10, 7] before harvesting the biomass. The fraction of unlabelled biomass produced prior to the start of 13C-labelled medium supply was calculated following simple wash-out kinetics [9].
NMR spectroscopy:
13C-HSQC nuclear magnetic resonance (NMR) spectra were acquired at 40°C on a Varian Inova spectrometer operating at a 1H-resonance frequency of 600 MHz essentially as described [6]. For each sample two spectra were acquired focusing on the aliphatic and aromatic regions. For more informatio see original paper.
METAFoR analysis:
Metabolic flux ratio (METAFoR) analysis was done based on the compartmentalized metabolic model of S. cerevisiae central carbon metabolism formulated by Maaheimo and co-workers (2001) [5]. The software FCAL (R.W. Glaser; FCAL 2.3.1) [4] was used for the integration of 13C-scalar fine structures of proteinogenic amino acid carbon signals in the 13C-HSQC NMR spectra and the calculation of relative abundances of intact carbon fragments originating from a single source molecule of glucose. For more information see original paper. --------------------------------------------References---------------------------------------
[1] Verduyn C, Postma E, Scheffers WA, van Dijken JP. Yeast. 1992, 8: 501-517.
[2] Wiebe MG, Rintala E, Tamminen A, Simolin H, Salusjärvi L, Toivari M, Kokkonen JT, Kiuru J, Ketola RA, Jouhten P, Huuskonen A, Maaheimo H, Ruohonen L, Penttilä M. FEMS Yeast Res. 2008, 8: 140-154.
[3] Fiaux J, Ìakar PZ, Sonderegger M, Wüthrich K, Szyperski T, Sauer U. Eukaryot Cell. 2003, 2: 170-180.
[4] Szyperski T, Glaser RW, Hochuli M, Fiaux J, Sauer U, Bailey JE, Wüthrich K. Metab Eng. 1999, 1: 189-197.
[5] Maaheimo H, Fiaux J, Ìakar PZ, Bailey JE, Sauer U, Szyperski T. Eur J Biochem. 2001, 268: 2464-2479.
[6] Szyperski T. Eur J Biochem. 1995, 232: 433-448.
[7] Sauer U, Hatzimanikatis V, Bailey JE, Hochuli M, Szyperski T, Wüthrich K. Nat Biotechnol. 1997, 15: 448-452.
[8] Sauer U, Lasko DR, Fiaux J, Hochuli M, Glaser R, Szyperski T, Wüthrich K, Bailey JE. J Bacteriol. 1999, 181: 6679-6688.
[9] Sola A, Maaheimo H, Ylonen K, Ferrer P, Szyperski T. Eur J Biochem. 2004, 271: 2462-2470.
[10] Fiaux J, Ìakar PZ, Sonderegger M, Wüthrich K, Szyperski T, Sauer U. Eukaryot Cell. 2003, 2: 170-180.

Data file
Downloadfluxes KIMODATAID117_v1.xlsx
Alternative format(s)
no file uploaded


Related Data: AccessID 61 | AccessID 62 | AccessID 69 | AccessID 70 | AccessID 93 | AccessID 97 | AccessID 98 | AccessID 99 | AccessID 100 | AccessID 111 | AccessID 115 | AccessID 120 | AccessID 121 | AccessID 122 | AccessID 123 | AccessID 124

Submission and curation info

Entered by Administrator KiMoSysFirst name: Administrator
Affiliation: INESC-ID/IST
Interests: mathematical modeling, accessible data, use of data

Created 2018-08-23 21:59:13 UTC

Updated 2018-08-24 16:32:54 UTC

Version 1

Status (reviewed) 2018-08-23 22:29:58 UTC

Associated Models

Here we can find relevant models associated with Data EntryID 117:

Model name Category Model Type Data used for Access Json

Associate models to data

- Several models can be associated.

Add New Model

Backimage Back | Top