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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
Published on: April 1, 2017
Detection of protein complex interactions via a Blue Native-PAGE retardation assay
Mahima Swamy1, Eszter Molnar, Thomas Bock
1Department for Molecular Immunology, Max Planck-Institute for Immunobiology, 79108 Freiburg, Germany.
Abstract:
We describe the Blue Native (BN)-PAGE retardation assay for the detection of interactions of biomolecules with protein complexes. Potential interactors of proteins are included in the BN gel matrix, resulting in retardation of proteins that interact with the added molecule. After validation using the T-cell antigen receptor, we applied the assay for a general identification of dextran interactors in combination with mass spectroscopy. The proteomic screen revealed triosephosphate isomerase oligomer as a dextran-binding, high M(R) complex.
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