Receptor Interactome Discovery with RDIMIS, a Membrane Protein Interaction Screen Using Recombinant Extracellular...

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Membrane protein interactions are crucial for cellular functions but difficult to study due to their complex biophysical properties.
• Existing methods often struggle with the unique challenges posed by transmembrane proteins and their native membrane environments.

Purpose of the Study:

• To present the Receptor Display in Membranes Interaction Screen (RDIMIS) platform for studying membrane protein interactions.
• To provide detailed protocols for generating, characterizing, and utilizing recombinant extracellular vesicles (rEVs) in interaction screening.
• To offer methods for library preparation, result validation, and profiling of endogenous extracellular vesicles.

Main Methods:

• Generation and isolation of recombinant extracellular vesicles (rEVs) from cells.
• Characterization of rEVs to ensure suitability for screening.
• Performance of the RDIMIS assay for unbiased screening of transmembrane and membrane-proximal protein interactions.
• Validation of screening results using microscopy.

Main Results:

• The RDIMIS platform successfully identifies interactions for challenging receptors in an unbiased manner.
• Detailed protocols ensure clear and interpretable screening results.
• The platform is adaptable for profiling naturally occurring extracellular vesicles.

Conclusions:

• The RDIMIS platform offers a robust solution for overcoming the challenges in studying membrane protein interactions.
• This methodology facilitates unbiased discovery of novel protein interactions within a membrane context.
• The provided protocols enable researchers to implement and validate RDIMIS for their specific research needs.