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Structure Elucidation of Unknown Metabolites in Metabolomics by Combined NMR and MS/MS Prediction

Journal Article · · Metabolites

Here, we introduce a cheminformatics approach that combines highly selective and orthogonal structure elucidation parameters; accurate mass, MS/MS (MS2), and NMR in a single analysis platform to accurately identify unknown metabolites in untargeted studies. The approach starts with an unknown LC-MS feature, and then combines the experimental MS/MS and NMR information of the unknown to effectively filter the false positive candidate structures based on their predicted MS/MS and NMR spectra. We demonstrate the approach on a model mixture and then we identify an uncatalogued secondary metabolite in Arabidopsis thaliana. The NMR/MS2 approach is well suited for discovery of new metabolites in plant extracts, microbes, soils, dissolved organic matter, food extracts, biofuels, and biomedical samples, facilitating the identification of metabolites that are not present in experimental NMR and MS metabolomics databases.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1421319
Report Number(s):
PNNL-SA--129343; 49679
Journal Information:
Metabolites, Journal Name: Metabolites Journal Issue: 1 Vol. 8; ISSN 2218-1989; ISSN METALU
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Large Scale Proteomic Data and Network-Based Systems Biology Approaches to Explore the Plant World journal June 2018
Hochdurchsatz‐Metabolomik mit 1D‐NMR journal November 2018
UHPLC-QTOF-MS/MS-SPE-NMR: A Solution to the Metabolomics Grand Challenge of Higher-Throughput, Confident Metabolite Identifications book January 2019
Statistically correlating NMR spectra and LC-MS data to facilitate the identification of individual metabolites in metabolomics mixtures journal February 2019
Cancer metabolomic markers in urine: evidence, techniques and recommendations journal May 2019
Phytochemical Profile and Antimicrobial Effects of Different Medicinal Plant: Current Knowledge and Future Perspectives journal January 2020
Recent Advances in Targeted and Untargeted Metabolomics by NMR and MS/NMR Methods journal April 2018