Spatial metabolomics using imaging mass spectrometry to identify the localization of asparaptine A in Asparagus officinalis.
IF: 1.308


Spatial metabolomics uses imaging mass spectrometry (IMS) to localize metabolites within tissue section. Here, we performed matrix-assisted laser desorption/ionization-Fourier transform ion cyclotron resonance-IMS (MALDI-FTICR-IMS) to identify the localization of asparaptine A, a naturally occurring inhibitor of angiotensin-converting enzyme, in green spears of asparagus (Asparagus officinalis). Spatial metabolome data were acquired in an untargeted manner. Segmentation analysis using the data characterized tissue-type-dependent and independent distribution patterns in cross-sections of asparagus spears. Moreover, asparaptine A accumulated at high levels in developing lateral shoot tissues. Quantification of asparaptine A in lateral shoots using liquid chromatography-tandem mass spectrometry (LC-MS/MS) validated the IMS analysis. These results provide valuable information for understanding the function of asparaptine A in asparagus, and identify the lateral shoot as a potential region of interest for multiomics studies to examine gene-to-metabolite associations in the asparaptine A biosynthesis.


Spatial Metabolomics
Asparagus officinalis
asparaptine A
imaging mass spectrometry
spatial metabolomics
sulfur-containing metabolite


Nakabayashi, Ryo
Hashimoto, Kei
Mori, Tetsuya
Toyooka, Kiminori
Sudo, Hiroshi
Saito, Kazuki

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