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MB Sample ID: SA094563
| Local Sample ID: | 9404 +Gly 8 |
| Subject ID: | SU001382 |
| Subject Type: | Bacteria |
| Subject Species: | Salmonella enterica serovar Typhimurium |
| Taxonomy ID: | 90371 |
| Genotype Strain: | LT2 |
| Gender: | Not applicable |
| Subject Comments: | The wild type as describe, also used a ridA null mutant (DM3480, ridA3::MudJ1734), DM9404 |
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Sample Preparation:
| Sampleprep ID: | SP001390 |
| Sampleprep Summary: | Preparation of growth medium samples. Spent media from each bacterial culture was lyophilized (VirTis Benchtop K) for 48 h. Once dry, each lyophilized sample was reconstituted in 150 L of 100 mM sodium phosphate buffer (Cambridge Isotope Laboratories), pH 7.0, containing 1/3 mM DSS (4,4-dimethyl-4-silapentane-1-sulfonic acid, Cambridge Isotope Laboratories) as an internal standard. Each sample was centrifuged at 20,000 X G for 30 min and 50 L of supernatant was transferred by a Bruker SamplePro liquid handler into 1.7 mm SampleJet NMR tubes (Bruker Biospin). Metabolite extraction from bacterial pellets. Each frozen bacterial pellet was thawed on ice and 1 mL of ice cold 80/20 methanol/water together with approximately 200 mL of 0.7mm silica beads (BioSpec products). Homogenization was carried out using a FastPrep 96 (MPBIO). The samples and extraction blanks went through three cycles of homogenization at 1800 rpm for 300 s each. At the end of each cycle samples and controls were centrifuged at 20000 x G for 30 min. Each supernatant was transferred to a new tube and 1 mL of ice-cold methanol/water added to the original tubes before each new cycle. The combined supernatants from each cycle were pooled and concentrated overnight using a CentriVap Benchtop Vacuum Concentrator (Labconco) down to 0.1 mL. The samples were then diluted with 0.5 mL of methanol/water and transferred into 0.6 mL centrifuge tube and concentrated to dryness. The extracts were reconstituted in 150 uL of deuterated 100 mM sodium phosphate buffer containing 1/3 mM of the internal standard DSS (d6 4,4-dimethyl-4-silapentane-1-sulfonic acid) at pH 7.0 and vortex mixed for 5 min. Each sample was centrifuged at 20000 x G for 30 min and transferred by a Bruker SamplePro liquid handler into 1.7 mm SampleJet NMR tubes. Extraction blanks were prepared following the same procedure except the biological material was replaced with an equal volume of water. Solvent blanks consisted of the reconstituting NMR buffer (deuterated sodium phosphate buffer with DSS). |
| Processing Storage Conditions: | -80℃ |
| Extract Storage: | -80℃ |
