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Updated: Jul 2, 2025
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Split-Ubiquitin Based Membrane Yeast Two-Hybrid MYTH System: A Powerful Tool For Identifying Protein-Protein Interactions
Published on: February 1, 2010
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ER Membrane Protein Interactions Using the Split-Ubiquitin System (SUS)
Lisa Yasmin Asseck1, Niklas Wallmeroth1, Christopher Grefen2
1Centre for Plant Molecular Biology, Developmental Genetics, University of Tübingen, Tübingen, Germany.
Methods in Molecular Biology (Clifton, N.J.)
|February 27, 2024
Summary
This study presents a yeast mating-based Split-Ubiquitin System (mbSUS) protocol to analyze protein-protein interactions (PPIs) of endoplasmic reticulum membrane proteins in vivo. The method allows studying full-length proteins in their native cellular environment and detecting ternary interactions.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- Protein-protein interactions (PPIs) are crucial for cellular functions.
- Membrane proteins are vital for signal perception, transduction, and transport.
- Studying PPIs of membrane proteins in their native context is challenging.
Purpose of the Study:
- To provide a detailed protocol for the yeast mating-based Split-Ubiquitin System (mbSUS).
- To enable in vivo analysis of PPIs involving full-length endoplasmic reticulum (ER) membrane proteins.
- To describe the application of the SUS Bridge assay (SUB) for detecting ternary protein interactions.
Main Methods:
- Utilizes the yeast mating-based Split-Ubiquitin System (mbSUS).
- Leverages the ubiquitin proteasome pathway to activate reporter genes.
- Employs the SUS Bridge assay (SUB) for ternary interaction detection.
Main Results:
- The mbSUS protocol allows for the study of full-length membrane proteins in their native cellular context.
- The system visualizes PPIs through the activation of reporter genes.
- The mating-based approach is scalable for both small- and large-scale studies.
Conclusions:
- The mbSUS is a robust method for investigating PPIs of ER membrane proteins in vivo.
- This system overcomes limitations of traditional methods like yeast two-hybrid by preserving protein integrity.
- The mbSUS and SUB assay provide valuable tools for comprehensive PPI analysis, including complex ternary interactions.
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