Abstract
Tandem ubiquitin-binding entities (TUBEs) act as molecular traps to isolate polyubiquitylated proteins facilitating the study of this highly reversible posttranslational modification. We provide here sample preparation and adaptations required for TUBE-based enrichment of the ubiquitin proteome from tumor cell lines or primary cells. Our protocol is suitable to identify ubiquitin substrates, enzymes involved in the ubiquitin proteasome pathway, as well as proteasome subunits by mass spectrometry. This protocol was adapted to prepare affinity columns, reduce background, and improve the protein recovery depending on the sample source and necessities.
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Acknowledgments
We thank Valérie Lang for the critical reading of this document, Gaël Roué for providing MCL cell lines, and Mikel Azkargorta and Felix Elortza for their technical support. This work was funded by the Ministerio de Economia y Competitividad, Spain grant BFU2011-28536 (MSR), Diputación Foral de Gipuzkoa (MSR and FA), and GSK OPEN-LAB foundation. LMC was supported by the GSK OPEN-LAB foundation. The authors would like to acknowledge networking support by the Proteostasis COST Action (BM1307).
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Xolalpa, W., Mata-Cantero, L., Aillet, F., Rodriguez, M.S. (2016). Isolation of the Ubiquitin-Proteome from Tumor Cell Lines and Primary Cells Using TUBEs. In: Matthiesen, R. (eds) Proteostasis. Methods in Molecular Biology, vol 1449. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-3756-1_8
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DOI: https://doi.org/10.1007/978-1-4939-3756-1_8
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Online ISBN: 978-1-4939-3756-1
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