In-cell NMR measurements of [U-13C]glucose consumption in Salmonella Typhimurium +/- Ampicillin

Description: This dataset contains raw in-cell NMR data acquired from a 500 Bruker NMR spectrometer, representing metabolic profiling of an Salmonella Typhimurium (S. Typhimurium) strain evolved through cyclic ampicillin treatment (strain C10) and its wild-type ancestor (strain WT). Bacterial strains were grown in 45 mL Gifu Anaerob Medium for 2.5 hours +/- ampicillin before harvesting for NMR analysis. [U-13C]glucose was injected into the bacterial suspension as the metabolic substrate for conventional in-cell NMR experiments, while hyperpolarized [U-13C, 2H]glucose was injected for dDNP-NMR experminents. The raw NMR data provide insights into antibiotic-induced metabolic changes in S. Typhimurium at the cellular level. These measurements are a resource for researchers examining the metabolic basis of bacterial tolerance to antibiotics.

Data include:

• Conventional In-Cell 13C NMR Data: Figure 4 data contains NMR measurements from WT and C10 strains harvested after 2.5 hours growth without antibiotics, while Figure 5 data contains NMR measurements from the strains under exposure to 8 µg/mL ampicillin. The time series was implemented as a pseudo-2D NMR experiment. 1D 13C NMR spectra were collected by accumulating 70 transients per time point for up to 64 time points aquired with a time resolution of 1 min per time point. Each FID was sampled by aquiring 22528 complex data points during an aqusition time of 345 milliseconds.   

• Dynamic Nuclear Polarization In-Cell 13C NMR (dDNP-NMR) Data: Figure 6 data contains NMR measurements from WT and C10 strains harvested after 2.5 hours growth without antibiotics followed by 10 min treatement with either 8 or 500 µg/mL ampicillin before dDNP-NMR analysis. A time series of 13C NMR spectra were aquired as a pseudo-2D NMR experiment using a 10 degree excitation pulse collecting 11264 data points every 0.5 seconds for 2 min.

Analysis of data was performed using TopSpin 4.1.3. software to interpret the NMR spectra.