PMID- 38532014 OWN - NLM STAT- MEDLINE DCOM- 20240415 LR - 20240506 IS - 1548-7105 (Electronic) IS - 1548-7091 (Print) IS - 1548-7091 (Linking) VI - 21 IP - 4 DP - 2024 Apr TI - DIP-MS: ultra-deep interaction proteomics for the deconvolution of protein complexes. PG - 635-647 LID - 10.1038/s41592-024-02211-y [doi] AB - Most proteins are organized in macromolecular assemblies, which represent key functional units regulating and catalyzing most cellular processes. Affinity purification of the protein of interest combined with liquid chromatography coupled to tandem mass spectrometry (AP-MS) represents the method of choice to identify interacting proteins. The composition of complex isoforms concurrently present in the AP sample can, however, not be resolved from a single AP-MS experiment but requires computational inference from multiple time- and resource-intensive reciprocal AP-MS experiments. Here we introduce deep interactome profiling by mass spectrometry (DIP-MS), which combines AP with blue-native-PAGE separation, data-independent acquisition with mass spectrometry and deep-learning-based signal processing to resolve complex isoforms sharing the same bait protein in a single experiment. We applied DIP-MS to probe the organization of the human prefoldin family of complexes, resolving distinct prefoldin holo- and subcomplex variants, complex-complex interactions and complex isoforms with new subunits that were experimentally validated. Our results demonstrate that DIP-MS can reveal proteome modularity at unprecedented depth and resolution. CI - (c) 2024. The Author(s). FAU - Frommelt, Fabian AU - Frommelt F AUID- ORCID: 0000-0003-3666-8005 AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. fabian.frommelt@hotmail.com. FAU - Fossati, Andrea AU - Fossati A AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. AD - Quantitative Biosciences Institute (QBI), University of California San Francisco, San Francisco, CA, USA. AD - Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, CA, USA. AD - J. David Gladstone Institutes, San Francisco, CA, USA. FAU - Uliana, Federico AU - Uliana F AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. AD - Department of Biology, Institute of Biochemistry, ETH Zurich, Zurich, Switzerland. FAU - Wendt, Fabian AU - Wendt F AUID- ORCID: 0000-0002-2501-536X AD - Department of Health Sciences and Technology (D-HEST), Institute of Translational Medicine (ITM), ETH Zurich, Zurich, Switzerland. FAU - Xue, Peng AU - Xue P AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. AD - Guangzhou National Laboratory, Guang Zhou, China. FAU - Heusel, Moritz AU - Heusel M AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. FAU - Wollscheid, Bernd AU - Wollscheid B AUID- ORCID: 0000-0002-3923-1610 AD - Department of Health Sciences and Technology (D-HEST), Institute of Translational Medicine (ITM), ETH Zurich, Zurich, Switzerland. FAU - Aebersold, Ruedi AU - Aebersold R AUID- ORCID: 0000-0002-9576-3267 AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. FAU - Ciuffa, Rodolfo AU - Ciuffa R AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. FAU - Gstaiger, Matthias AU - Gstaiger M AUID- ORCID: 0000-0002-3245-3253 AD - Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland. matthias.gstaiger@imsb.biol.ethz.ch. LA - eng GR - 115766/Innovative Medicines Initiative (IMI)/ GR - 875510/Innovative Medicines Initiative (IMI)/ PT - Journal Article DEP - 20240326 PL - United States TA - Nat Methods JT - Nature methods JID - 101215604 RN - 0 (Proteome) RN - 0 (Protein Isoforms) SB - IM MH - Humans MH - *Proteomics/methods MH - Chromatography, Affinity MH - *Proteome/analysis MH - Tandem Mass Spectrometry MH - Protein Isoforms PMC - PMC11009110 COIS- M.H. was an employee of EVOSEP. The remaining authors declare no competing interests. EDAT- 2024/03/27 06:43 MHDA- 2024/04/15 06:43 PMCR- 2024/03/26 CRDT- 2024/03/27 00:26 PHST- 2023/03/22 00:00 [received] PHST- 2024/02/14 00:00 [accepted] PHST- 2024/04/15 06:43 [medline] PHST- 2024/03/27 06:43 [pubmed] PHST- 2024/03/27 00:26 [entrez] PHST- 2024/03/26 00:00 [pmc-release] AID - 10.1038/s41592-024-02211-y [pii] AID - 2211 [pii] AID - 10.1038/s41592-024-02211-y [doi] PST - ppublish SO - Nat Methods. 2024 Apr;21(4):635-647. doi: 10.1038/s41592-024-02211-y. Epub 2024 Mar 26.