PRISMA and BioID disclose a motifs-based interactome of the intrinsically disordered transcription factor C/EBPα
Evelyn Ramberger, Valeria Sapozhnikova, Elisabeth Kowenz‐Leutz, Karin Zimmermann, Nathalie Nicot, Petr V. Nazarov, Daniel Pérez-Hernández, Ulf Reimer, Philipp Mertins, Gunnar Dittmar, Achim Leutz
Abstract
validated and isoform specific interaction map of C/EBPα. The myeloid C/EBPα interactome comprises promiscuous and PTM-regulated interactions with protein machineries involved in gene expression, epigenetics, genome organization, DNA replication, RNA processing, and nuclear transport. C/EBPα interaction hotspots coincide with homologous conserved regions of the C/EBP family that also score as molecular recognition features. PTMs alter the interaction spectrum of C/EBP-motifs to configure a multi-valent transcription factor hub that interacts with multiple co-regulatory components, including BAF/SWI-SNF or Mediator complexes. Combining PRISMA and BioID is a powerful strategy to systematically explore the PTM-regulated interactomes of intrinsically disordered transcription factors.