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Int. J. Mol. Sci. 2012, 13(9), 11593-11609; doi:10.3390/ijms130911593
Article

Use of Biotinylated Ubiquitin for Analysis of Rat Brain Mitochondrial Proteome and Interactome

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Received: 27 July 2012; in revised form: 22 August 2012 / Accepted: 3 September 2012 / Published: 14 September 2012
(This article belongs to the collection Advances in Proteomic Research)
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Abstract: Applicability of in vitro biotinylated ubiquitin for evaluation of endogenous ubiquitin conjugation and analysis of ubiquitin-associated protein-protein interactions has been investigated. Incubation of rat brain mitochondria with biotinylated ubiquitin followed by affinity chromatography on avidin-agarose, intensive washing, tryptic digestion of proteins bound to the affinity sorbent and their mass spectrometry analysis resulted in reliable identification of 50 proteins belonging to mitochondrial and extramitochondrial compartments. Since all these proteins were bound to avidin-agarose only after preincubation of the mitochondrial fraction with biotinylated ubiquitin, they could therefore be referred to as specifically bound proteins. A search for specific ubiquitination signature masses revealed several extramitochondrial and intramitochondrial ubiquitinated proteins representing about 20% of total number of proteins bound to avidin-agarose. The interactome analysis suggests that the identified non-ubiquitinated proteins obviously form tight complexes either with ubiquitinated proteins or with their partners and/or mitochondrial membrane components. Results of the present study demonstrate that the use of biotinylated ubiquitin may be considered as the method of choice for in vitro evaluation of endogenous ubiquitin-conjugating machinery in particular subcellular organelles and changes in ubiquitin/organelle associated interactomes. This may be useful for evaluation of changes in interactomes induced by protein ubiquitination under norm and various brain pathologies.
Keywords: biotinylated ubiquitin; rat brain mitochondria; mitochondrial proteome; interactome biotinylated ubiquitin; rat brain mitochondria; mitochondrial proteome; interactome
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Buneeva, O.A.; Medvedeva, M.V.; Kopylov, A.T.; Zgoda, V.G.; Medvedev, A.E. Use of Biotinylated Ubiquitin for Analysis of Rat Brain Mitochondrial Proteome and Interactome. Int. J. Mol. Sci. 2012, 13, 11593-11609.

AMA Style

Buneeva OA, Medvedeva MV, Kopylov AT, Zgoda VG, Medvedev AE. Use of Biotinylated Ubiquitin for Analysis of Rat Brain Mitochondrial Proteome and Interactome. International Journal of Molecular Sciences. 2012; 13(9):11593-11609.

Chicago/Turabian Style

Buneeva, Olga A.; Medvedeva, Marina V.; Kopylov, Arthur T.; Zgoda, Victor G.; Medvedev, Alexei E. 2012. "Use of Biotinylated Ubiquitin for Analysis of Rat Brain Mitochondrial Proteome and Interactome." Int. J. Mol. Sci. 13, no. 9: 11593-11609.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert