Related Experiment Video
Updated: Jul 11, 2026
09:35
Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
Published on: April 1, 2017
How to analyze protein complexes by 2D blue native SDS-PAGE
Veronika Reisinger1, Lutz Andreas Eichacker
1Ludwig Maximilian University, Munich, Germany.
Proteomics
|September 26, 2007
Summary
Blue native polyacrylamide gel electrophoresis (BN-PAGE) enables high-resolution separation of membrane protein complexes. This proteomic technology, coupled with detailed solubilization, allows for precise analysis of protein complex stoichiometry and assembly.
Area of Science:
- Proteomics
- Cell Biology
- Biochemistry
Background:
- Cellular functions rely on protein complexes, which are crucial for compartmentalization and organization.
- Analyzing membrane protein complexes is challenging due to their lipid environment.
- Existing proteomic technologies have limitations in resolving complex protein structures.
Purpose of the Study:
- To establish a high-resolution separation strategy for membrane protein complexes using Blue native polyacrylamide gel electrophoresis (BN-PAGE).
- To demonstrate the utility of BN-PAGE for analyzing protein complex stoichiometry and assembly.
- To present BN-PAGE as a preceding step for detailed membrane proteome characterization.
Main Methods:
- Development of a detailed solubilization strategy for membrane protein complexes.
- High-resolution separation of protein complexes using Blue native polyacrylamide gel electrophoresis (BN-PAGE).
- Combined BN/SDS-PAGE for analyzing protein subunits, stoichiometry, and assembly.
- Utilized standard protein detection methods including DIGE, gel blot analysis, and mass spectrometry.
Main Results:
- High-resolution separation of protein complexes was achieved through optimized solubilization strategies with BN-PAGE.
- BN/SDS-PAGE enabled detailed analysis of individual protein subunits within complexes.
- The method allows for the determination of specific subunit stoichiometry and the study of protein complex assembly.
Conclusions:
- BN-PAGE, with appropriate solubilization, is a powerful tool for high-resolution separation of membrane protein complexes.
- BN/SDS-PAGE provides comprehensive insights into protein complex composition and dynamics.
- This approach is envisioned to enhance the characterization of membrane proteomes, preceding traditional 2D IEF/SDS-analysis.
Related Concept Videos
01:27SDS-PAGE
Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
A variation of gel electrophoresis, termed polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact proteins...
01:22Two-dimensional Gel Electrophoresis
Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such as cells...
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such as cells...
01:15Western Blotting
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.