Authors: Orhi Barroso-Gomila, Fredrik Trulsson, Veronica Muratore, Iñigo Canosa, Laura Merino-Cacho, Ana Rosa Cortazar, Coralia Pérez, Mikel Azkargorta, Ibon Iloro, Arkaitz Carracedo, Ana M. Aransay, Felix Elortza, Ugo Mayor, Alfred C. O. Vertegaal, Rosa Barrio, James D. Sutherland
Published: 2021-11-18
DOI: 10.1038/s41467-021-26807-6
Source: Full article
AbstractThe fast dynamics and reversibility of posttranslational modifications by the ubiquitin family pose significant challenges for research. Here we present SUMO-ID, a technology that merges proximity biotinylation by TurboID and protein-fragment complementation to find SUMO-dependent interactors of proteins of interest. We develop an optimized split-TurboID version and show SUMO interaction-dependent labelling of proteins proximal to PML and RANGAP1. SUMO-dependent interactors of PML are involved in transcription, DNA damage, stress response and SUMO modification and are highly enriched in SUMO Interacting Motifs, but may only represent a subset of the total PML proximal proteome. Likewise, SUMO-ID also allow us to identify interactors of SUMOylated SALL1, a less characterized SUMO substrate. Furthermore, using TP53 as a substrate, we identify SUMO1, SUMO2 and Ubiquitin preferential interactors. Thus, SUMO-ID is a powerful tool that allows to study the consequences of SUMO-dependent interactions, and may further unravel the complexity of the ubiquitin code.