Summary of study ST001308

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench,, where it has been assigned Project ID PR000889. The data can be accessed directly via it's Project DOI: 10.21228/M8S39G This work is supported by NIH grant, U2C- DK119886.


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Study IDST001308
Study Title1H NMR metabolomics corroborates serine hydroxymethyltransferase as the primary target of 2-aminoacrylate in a ridA mutant of Salmonella enterica
Study TypeNMR metabolomics on Salmonella enterica
Study SummaryThe reactive intermediate deaminase RidA (EC: is conserved across all domains of life and deaminates reactive enamine species. When S. enterica ridA mutants are grown in minimal medium, 2-aminoacrylate (2AA) accumulates, damages several pyridoxal 5’-phosphate (PLP)- dependent enzymes, and elicits an observable growth defect. Genetic studies suggested that damage to serine hydroxymethyltransferase (GlyA), and the resultant depletion of 5,10-methelenetetrahydrofolate (5,10-mTHF), was responsible for the observed growth defect. However, the downstream metabolic consequence from GlyA damage by 2AA remains relatively unexplored. This study sought to use untargeted 1H NMR metabolomics to determine whether the metabolic state of a S. enterica ridA mutant was accurately reflected by characterizing growth phenotypes. The data supported the conclusion that metabolic changes in a ridA mutant were due to the IlvA-dependent generation of 2AA, and that the majority of these changes were a consequence of damage to GlyA. While many of the shifts in the metabolome of a ridA mutant could be explained, changes in some metabolites were not easily modeled, suggesting that additional levels of metabolic complexity remain to be unraveled.
University of Georgia
DepartmentMicrobiology, Biochemistry, Complex Carbohydrate Research Center
LaboratoryEdison Lab and Downs lab
Last NameGouveia
First NameGoncalo
Address315 riverbend road, Complex Carbohydrate Research Centre, ATHENS, GA, 30605, USA
Submit Date2020-01-22
Num Groups4
Total Subjects40
Raw Data AvailableYes
Raw Data File Type(s).par, pdata, info, .xml
Analysis Type DetailNMR
Release Date2020-03-03
Release Version1
Goncalo Gouveia Goncalo Gouveia application/zip

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Treatment ID:TR001397
Treatment Summary:Ten biologically independent wild-type and ridA mutant cultures were grown overnight in NB medium shaking at 37 °C and used to inoculate (1% inoculum) 250 mL non-baffled flasks holding 125 mL of medium. Each culture inoculated one each of the three media types (minimal medium, minimal medium with 1 mM L-isoleucine, and minimal medium with 1 mM glycine), for a total of 60 flasks. Flasks were randomly arranged in an Innova®44 incubator and cultures allowed to grow 16 h at 37 °C, shaking at 180 RPM. Cultures were chilled 5 min on ice and then harvested by centrifugation at 7,000 x G for 10 min at 4 °C. The supernatant was decanted, with 10 mL transferred to sterile 15 mL conical tubes and flash-frozen using liquid nitrogen for downstream analysis of external metabolites. Cell pellets were transferred to sterile 15 mL conical tubes after resuspension in 10 mL ddH2O, prior to a second pelleting at 7,000 x G for 10 min at 4 °C. The supernatant was decanted and pellets were flash-frozen using liquid nitrogen and stored at -80 °C.