Membrane Protein Interaction
Membrane Protein Interaction - Related Videos
04:57
On-Membrane Protein Digestion to Prepare Co-Immunoprecipitated Proteins for Interaction Studies
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2025
This video demonstrates co-immunoprecipitated protein complexes on a PVDF membrane for protein-protein interaction analysis. The reduced proteins from complexes were treated with trypsin to cleave the individual proteins at the smaller peptides, then, the remaining peptides were extracted from the PVDF membrane. The pulled peptide derived from both proteins in the complex was then dried and resuspended in a low concentration of formic acid for further analysis.
08:46
Green Fluorescent Protein-based Expression Screening of Membrane Proteins in Escherichia coli
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Cited by 34 •
2015
A streamlined approach to screening for the expression of recombinant membrane proteins in Escherichia coli based on fusion to green fluorescent protein is presented.
08:38
Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro
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Cited by 6 •
2011
Testing protein-protein interaction is indispensable for dissection of protein functionality. Here, we introduce an in vitro protein-protein binding assay to probe a membrane-immobilized protein with a soluble protein. This assay provides a reliable method to test interaction between an insoluble protein and a protein in solution.
07:31
Native Cell Membrane Nanoparticles System for Membrane Protein-Protein Interaction Analysis
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Cited by 14 •
2020
Presented here is a protocol for the determination of oligomeric state of membrane proteins that utilizes a native cell membrane nanoparticle system in conjunction with electron microscopy.
10:53
Membrane-SPINE: A Biochemical Tool to Identify Protein-protein Interactions of Membrane Proteins In Vivo
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Cited by 5 •
2013
A biochemical approach is described to identify in vivo protein-protein interactions (PPI) of membrane proteins. The method combines protein cross-linking, affinity purification and mass spectrometry, and is adaptable to almost any cell type or organism. With this approach, even the identification of transient PPIs becomes possible.
FAQs
Specific molecular features determine whether neighboring proteins recognize and associate with one another. Complementary surfaces provide matching contact regions, while hydrophobic regions favor placement near the membrane and electrostatic forces influence partner recognition. Together, these features help determine which proteins form complexes, supporting organized signaling, transport, adhesion, and other membrane-based cellular activities.
Hydrophobic regions help proteins associate with the membrane environment, whereas electrostatic forces influence attraction and compatibility between interaction partners. Their combined effects can stabilize contacts or favor particular arrangements within a protein complex. These physical contributions are important when analyzing how membrane-associated proteins recognize partners and maintain functional organization.
A conformational change alters a protein’s shape and can modify the surfaces available for binding or functional association. In receptor systems, that structural adjustment can connect an external recognition event with an intracellular signaling pathway. Studying these changes helps explain how membrane proteins transmit information across the membrane and coordinate cellular responses.
Structural binding emphasizes the physical association of proteins through compatible surfaces and molecular forces. Functional association extends beyond contact, describing how the partners work together in processes such as signaling, transport, adhesion, or cellular organization. This distinction helps researchers interpret whether a detected complex reflects simple proximity or contributes directly to membrane activity.
Researchers examine these interactions through experimental and computational analyses. Experimental approaches can reveal how proteins associate or function together, while computational analyses help examine compatible surfaces, hydrophobic regions, electrostatic forces, and possible conformational changes. Using both perspectives supports interpretation of membrane complexes in cell biology and structural biology without relying on a single type of evidence.
Analysis of these interactions can clarify how receptors activate intracellular pathways, how channels and transporters regulate molecular movement, and how adhesion-related complexes organize cellular behavior. The resulting knowledge supports cell biology and structural biology research, while also informing drug discovery and the development of therapies that target membrane proteins.