Abstract
Mass spectrometry is a sensitive and selective analytical technique that enables detection and quantitation of low abundance compounds in a complex sample matrix. Targeted metabolomics allows for quantitative analysis of metabolites, providing kinetic information of production and consumption rates, an essential step to investigate microbial metabolism. Here, we describe a targeted metabolomics protocol for yeast samples, from sample preparation to mass spectrometry analysis, which enables the identification of metabolic fluxes after xylose consumption. Sample preparation methods were optimized for quenching of yeast metabolism followed by intracellular metabolite extraction, using cold methanol and boiling ethanol protocols. Ultrahigh performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) methods using ion pair chromatography (IPC) and hydrophilic interaction liquid chromatography (HILIC) allowed for the quantitation of 18 metabolites involved in central carbon metabolism (glycolysis, pentose phosphate pathway, and tricarboxylic acid cycle). The protocol here described was successfully applied to quantify metabolites in Scheffersomyces stipitis, Spathaspora passalidarum, Spathaspora arborariae, and Candida tenuis samples after xylose consumption.
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Acknowledgment
The authors are grateful to the Brazilian Agricultural Research Corporation (EMBRAPA) for the financial support.
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Campos, C.G., de Aquino Ribeiro, J.A., de Almeida, J.R.M., Quirino, B.F., Abdelnur, P.V. (2019). Targeted Metabolomics of Xylose-Fermenting Yeasts Based on Mass Spectrometry. In: Baidoo, E. (eds) Microbial Metabolomics. Methods in Molecular Biology, vol 1859. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-8757-3_8
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DOI: https://doi.org/10.1007/978-1-4939-8757-3_8
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