A high-throughput approach for measuring temporal changes in the interactome
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Updated: May 19, 2026

Label-Free Immunoprecipitation Mass Spectrometry Workflow for Large-scale Nuclear Interactome Profiling
Published on: November 17, 2019
Anders R Kristensen1, Joerg Gsponer, Leonard J Foster
1Department of Biochemistry & Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada.
Abstract:
Interactomes are often measured using affinity purification-mass spectrometry (AP-MS) or yeast two-hybrid approaches, but these methods do not provide stoichiometric or temporal information. We combine quantitative proteomics and size-exclusion chromatography to map 291 coeluting complexes. This method allows mapping of an interactome to the same depth and accuracy as AP-MS with less work and without overexpression or tagging. The use of triplex labeling enables monitoring of interactome rearrangements.

