Abstract
The in vivo analysis of protein–protein interactions (PPIs) is a critical factor for gaining insights into cellular mechanisms and their biological functions. To that end, a constantly growing number of genetic tools has been established, some of which are using baker’s yeast (Saccharomyces cerevisiae) as a model organism. Here, we provide a detailed protocol for the yeast mating-based split-ubiquitin system (mbSUS) to study binary interactions among or with full-length membrane proteins in their native subcellular environment. The system is based on the reassembly of two autonomously non-functional ubiquitin moieties attached to proteins of interest (POIs) into a native-like molecule followed by the release of a transcription factor. Upon its nuclear import, the activation of reporter gene expression gives a visual output via growth on interaction-selective media. Additionally, we apply a modification of the classical split-ubiquitin technique called CytoSUS that detects interactions of non-membrane/soluble proteins in their full-length form via translational fusion of an ER membrane anchor.
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Asseck, L.Y., Grefen, C. (2018). Detecting Interactions of Membrane Proteins: The Split-Ubiquitin System. In: Oñate-Sánchez, L. (eds) Two-Hybrid Systems. Methods in Molecular Biology, vol 1794. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-7871-7_4
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DOI: https://doi.org/10.1007/978-1-4939-7871-7_4
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Publisher Name: Humana Press, New York, NY
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