Can non-denaturing gel electrophoresis separate interacting protein complexes? For example, after running complex AB on the gel, can a band for one of the proteins A appear?
Native gel electrophoresis is not specifically designed to separate interacting protein complexes, but under certain conditions, it is still possible to achieve the separation of complex AB.
The main principle of native gel electrophoresis is that proteins are separated in an electric field based on their charge and size. Whether a complex can be separated by native gel electrophoresis depends on several factors, such as the strength of the interactions between proteins, the stability of the complex, and the size and charge of the protein molecules. If the interactions between proteins are weak, the electrophoresis process may cause the complex to dissociate, resulting in bands of individual proteins on the gel. However, if the interactions are strong, the complex may remain intact on the gel and not be separated.
If your goal is to dissociate the complex and observe each individual protein on the gel, it is more suitable to use denaturing gel electrophoresis (such as SDS-PAGE). In this method, proteins bind with SDS and other denaturing agents, causing the complex to dissociate and preventing it from re-associating, thus allowing the proteins to separate into individual bands on the gel. You can also try using milder separation conditions (such as reducing electrophoresis time or changing the buffer system) to enhance the separation of protein complexes in native gel electrophoresis.
Biotec-Peak Biotech - Characterization of Biologics, High-Quality Mass Spectrometry Services for Multi-Omics
Related Services:
Protein separation based on SDS-PAGE
Two-dimensional gel electrophoresis services
How to order?
