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New untargeted metabolic profiling combining mass spectrometry and isotopic labeling: Application on Aspergillus fumigatus grown on wheat
- Source :
- Analytical Chemistry, Analytical Chemistry, American Chemical Society, 2013, 85 (17), pp.8412-8420. ⟨10.1021/ac401872f⟩, Analytical Chemistry, 2013, 85 (17), pp.8412-8420. ⟨10.1021/ac401872f⟩
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; Characterization of fungal secondary metabolomes has become a challenge due to the industrial applications of many of these molecules, and also due to the emergence of fungal threats to public health and natural ecosystems. Given that, the aim of the present study was to develop an untargeted method to analyze fungal secondary metabolomes by combining high-accuracy mass spectrometry and double isotopic labeling of fungal metabolomes. The strain NRRL 35693 of Aspergillus fumigatus, an important fungal pathogen, was grown on three wheat grain substrates: (1) naturally enriched grains (99% 12C), (2) grains enriched 96.8% with 13C, (3) grains enriched with 53.4% with 13C and 96.8% with 15N. Twenty-one secondary metabolites were unambiguously identified by high-performance liquid chromatography−high-resolution mass spectrometry (HPLC−HRMS) analysis. AntiBase 2012 was used to confirm the identity of these metabolites. Additionally, on the basis of tandem mass spectrometry (MSn) experiments, it was possible to identify for the first time the formula and the structure of fumigaclavine D, a new member of the fumigaclavines family. Post biosynthesis degradation of tryptoquivaline F by methanol was also identified during HPLC− HRMS analysis by the detection of a carbon atom of nonfungal origin. The interest of this method lies not only on the unambiguous determination of the exact chemical formulas of fungal secondary metabolites but also on the easy discrimination of nonfungal products. Validation of the method was thus successfully achieved in this study, and it can now be applied to other fungal metabolomes, offering great possibilities for the discovery of new drugs or toxins.
- Subjects :
- 0303 health sciences
Wheat grain
Chromatography
biology
030306 microbiology
Chemistry
Aspergillus fumigatus
[SDV]Life Sciences [q-bio]
Fungal pathogen
Tandem mass spectrometry
biology.organism_classification
Mass spectrometry
Analytical Chemistry
Isotopic labeling
03 medical and health sciences
Tandem Mass Spectrometry
Isotope Labeling
Environmental chemistry
Metabolome
Natural ecosystem
Triticum
030304 developmental biology
Subjects
Details
- Language :
- English
- ISSN :
- 00032700 and 15206882
- Database :
- OpenAIRE
- Journal :
- Analytical Chemistry, Analytical Chemistry, American Chemical Society, 2013, 85 (17), pp.8412-8420. ⟨10.1021/ac401872f⟩, Analytical Chemistry, 2013, 85 (17), pp.8412-8420. ⟨10.1021/ac401872f⟩
- Accession number :
- edsair.doi.dedup.....34a7943f1ae56554cc8417a2a5de3b62