Abstract
Determining the proteome of a nuclear body is a crucial step toward understanding its function; however, it is extremely challenging to obtain pure nuclear body preparations. Moreover, many nuclear proteins dynamically associate with multiple bodies and subnuclear compartments, confounding analysis. We have found that a more practical approach is to carry out affinity purification of nuclear body sub-complexes via the use of tagged nuclear-body-specific marker proteins. Here we describe in detail the method to identify new nuclear body protein sub-complexes through SILAC (stable isotope labeling by amino acids in culture)-based affinity purification followed by quantitative mass spectrometry.
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Acknowledgments
The authors would like to thank Drs. Angus Lamond, Nick Morrice, Douglas Lamont, and Lawrence Puente for advice and assistance. We thank colleagues in the Fox and Trinkle labs for helpful discussions and suggestions and Anna Kula and Dr. Alessandro Marcello for assistance with the alternate nuclear isolation protocol. This work was supported by the Terry Fox Research Institute (Ref: 20148, LTM), Natural Sciences and Engineering Research Council (Ref: 372370, LTM), and National Institute of Health and Medical Research, Australia (Ref: 1030695, 1048659, and 1050585, AHF). LTM holds a Canadian Institutes of Health Research New Investigator Award. AHF is a Cancer Council of Western Australia Research Fellow.
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Fox, A., Mehta, V., Boulon, S., Trinkle-Mulcahy, L. (2015). Extracting, Enriching, and Identifying Nuclear Body Sub-Complexes Using Label-Based Quantitative Mass Spectrometry. In: Nakagawa, S., Hirose, T. (eds) Nuclear Bodies and Noncoding RNAs. Methods in Molecular Biology, vol 1262. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-2253-6_13
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DOI: https://doi.org/10.1007/978-1-4939-2253-6_13
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