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Title: Unambiguous Metabolite Identification in High-Throughput Metabolomics by Hybrid 1H-NMR/ESI-MS1 Approach

The invention improves accuracy of metabolite identification by combining direct infusion ESI-MS with one-dimensional 1H-NMR spectroscopy. First, we apply a standard 1H-NMR metabolite identification protocol by matching the chemical shift, J-coupling and intensity information of experimental NMR signals against the NMR signals of standard metabolites in a metabolomics reference libraries. This generates a list of candidate metabolites. The list contains both false positive and ambiguous identifications. The software tool (the invention) takes the list of candidate metabolites, generated from NMRbased metabolite identification, and then calculates, for each of the candidate metabolites, the monoisotopic mass-tocharge (m/z) ratios for each commonly observed ion, fragment and adduct feature. These are then used to assign m/z ratios in experimental ESI-MS spectra of the same sample. Detection of the signals of a given metabolite in both NMR and MS spectra resolves the ambiguities, and therefore, significantly improves the confidence of the identification.
Publication Date:
OSTI Identifier:
1329615
Report Number(s):
Unambiguous Metabolite Identification in High-Thro; 005002MLTPL00
Battelle IPID 31014-E
DOE Contract Number:
AC05-76RL01830
Software Revision:
00
Software Package Number:
005002
Software CPU:
MLTPL
Open Source:
Yes
Available as open source
Source Code Available:
No
Related Software:
Third party code (JavaScript, CSS and HTML resources for JQuery, D3.js, Font Awesome, Twitter Bootstrap and Lobipanel) is included in the source code for the user interface components of the invention. Third party code (precompiled Java library for FasterXML Jackson Core) is included in the source code for the data input and output components of the invention.
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Contributing Orgs:
Battelle Memorial Institute, Pacific Northwest Division (PNNL)
Country of Publication:
United States

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