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Mol Syst Biol. 2018 Aug 13;14(8):e8126. doi: 10.15252/msb.20178126.

Data-independent acquisition-based SWATH-MS for quantitative proteomics: a tutorial.

Author information

1
Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), Technical University of Munich (TUM), Freising, Germany tina.ludwig@tum.de.
2
Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland.
3
Department of Systems Biology, Columbia University, New York, NY, USA.
4
Faculty of Science, University of Zurich, Zurich, Switzerland.

Abstract

Many research questions in fields such as personalized medicine, drug screens or systems biology depend on obtaining consistent and quantitatively accurate proteomics data from many samples. SWATH-MS is a specific variant of data-independent acquisition (DIA) methods and is emerging as a technology that combines deep proteome coverage capabilities with quantitative consistency and accuracy. In a SWATH-MS measurement, all ionized peptides of a given sample that fall within a specified mass range are fragmented in a systematic and unbiased fashion using rather large precursor isolation windows. To analyse SWATH-MS data, a strategy based on peptide-centric scoring has been established, which typically requires prior knowledge about the chromatographic and mass spectrometric behaviour of peptides of interest in the form of spectral libraries and peptide query parameters. This tutorial provides guidelines on how to set up and plan a SWATH-MS experiment, how to perform the mass spectrometric measurement and how to analyse SWATH-MS data using peptide-centric scoring. Furthermore, concepts on how to improve SWATH-MS data acquisition, potential trade-offs of parameter settings and alternative data analysis strategies are discussed.

KEYWORDS:

SWATH‐MS; data‐independent acquisition; mass spectrometry; quantitative proteomics; systems biology

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