- Endogenous protein interactomes resolved through immunoprecipitation-coupled quantitative proteomics in cell lines.
Endogenous protein interactomes resolved through immunoprecipitation-coupled quantitative proteomics in cell lines.
STAR protocols (2022-09-20)
Raman Kumar, Karthik S Kamath, Luke Carroll, Peter Hoffmann, Jozef Gecz, Lachlan A Jolly
PMID36121748
RESUMEN
Immunoprecipitation (IP) of endogenously expressed proteins is one of the most biologically relevant techniques to identify protein-protein interactions. We describe an adaptable IP protocol reliant on a specific antibody to the target protein. We detail a quantitative proteomics workflow for the unbiased identification of co-immunoprecipitating proteins, known collectively as an interactome. This includes protocols for the tryptic digestion, Tandem Mass Tag labeling and fractionation of peptides, and their identification and quantification using liquid chromatography-mass spectrometry including computational and statistical analysis. For complete details on the use and execution of this protocol, please refer to Johnson et al. (2020).
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IgG from rabbit serum, reagent grade, ≥95% (SDS-PAGE), essentially salt-free, lyophilized powder
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