Abstract
Quantitative metaproteomics aims to accurately determine the relative abundances of thousands of proteins in a microbial community. This approach can be used to provide a comprehensive view of metabolic activities of organisms in microbial communities and uncover significant changes in protein expression between communities at different developmental stages, environment types or in response to different perturbations. Here, we describe three strategies for quantitative metaproteomics, including label-free, 15N metabolic labeling, and isobaric chemical labeling. The measurements are all based on a shotgun proteomics workflow involving proteolysis, two-dimensional liquid chromatogram-tandem mass spectrometry, and database searching against a metagenomic protein database. Quantitative metaproteomics was established and demonstrated using a model microbial community from acid mine drainage.
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Acknowledgement
We like to thank Zhou Li, Nathan C. VerBerkmoes, Robert L. Hettich, Christopher P. Belnap, and Nagiza F. Samatova for their contributions in the development of the methodology described here. This work was funded by the US Department of Energy, Office of Biological and Environmental Research, and Office of Advanced Scientific Computing Research. Oak Ridge National Laboratory is managed by UT-Battelle LLC for the Department of Energy.
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Pan, C., Banfield, J.F. (2014). Quantitative Metaproteomics: Functional Insights into Microbial Communities. In: Paulsen, I., Holmes, A. (eds) Environmental Microbiology. Methods in Molecular Biology, vol 1096. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-712-9_18
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DOI: https://doi.org/10.1007/978-1-62703-712-9_18
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