Abstract
Mitochondrial nucleoids are compact nucleoprotein complexes, in which mtDNA is located, replicated, and transcribed. Several proteomic approaches have been previously employed to identify nucleoid proteins; however, a consensus list of nucleoid-associated proteins has not been generated. Here we describe a proximity-biotinylation assay, BioID, which allows identification of proximity interactors of mitochondrial nucleoid proteins. It uses a promiscuous biotin ligase fused to a protein of interest which covalently attaches biotin to lysine residues of its proximal neighbors. Biotinylated proteins can be further enriched by a biotin-affinity purification and identified by mass-spectrometry. BioID can identify transient and weak interactions and can be used to identify changes in the interactions upon different cellular treatments, for different protein isoforms or for pathogenic variants.
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Aaltonen, M.J., Antonicka, H. (2023). Identification of Proximity Interactors of Mammalian Nucleoid Proteins by BioID. In: Nicholls, T.J., Uhler, J.P., Falkenberg, M. (eds) Mitochondrial DNA. Methods in Molecular Biology, vol 2615. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2922-2_12
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DOI: https://doi.org/10.1007/978-1-0716-2922-2_12
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