DSP-crosslinking and Immunoprecipitation to Isolate Weak Protein Complex
| Autor: | Kotaro Akaki, Takashi Mino, Osamu Takeuchi |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Immunoprecipitation (IP)
General Immunology and Microbiology FLAG-tag Protein-protein interaction (PPI) General Neuroscience Hemagglutinin (HA)-tag Methods Article HeLa cells Plant Science Dithiobis (succinimidyl propionate) (DSP) crosslinking General Biochemistry Genetics and Molecular Biology Tandem affinity purification |
| Zdroj: | Bio Protoc |
| ISSN: | 2331-8325 |
| DOI: | 10.21769/bioprotoc.4478 |
| Popis: | Detecting protein-protein interactions (PPIs) is one of the most used approaches to reveal the molecular regulation of protein of interests (POIs). Immunoprecipitation of POIs followed by mass spectrometry or western blot analysis enables us to detect co-precipitated POI-binding proteins. However, some binding proteins are lost during cell lysis or immunoprecipitation if the protein binding affinity is weak. Crosslinking POI and its binding proteins stabilizes the PPI and increases the chance of detecting the interacting proteins. Here, we introduce the method of DSP (dithiobis(succinimidyl propionate))-mediated crosslinking, followed by tandem immunoprecipitation (FLAG and HA tags). The eluted proteins interacting with POI can be analyzed by mass spectrometry or western blotting. This method has the potential to be applied to various cytoplasmic proteins. Graphical abstract. |
| Databáze: | OpenAIRE |
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