Biomolecules
Integrative Multimodal Profiling of TAp73 and DNp73 Reveals Isoform-Specific Transcriptomic Coregulator Landscapes in Cancer Programs
Steffen Möller, Alf Spitschak, Nico Murr, Brigitte M. Pützer
(1) Background: The transcription factor p73 exists in multiple isoforms with divergent functions in cancer. While DNp73 promotes stemness, epithelial–mesenchymal transition (EMT), and metastasis, the tumor-suppressive isoform TAp73 can also switch to promoting cancer progression. How isoforms sharing the same DNA-binding domain produce divergent outcomes remains unclear. (2) Methods: Here, we performed CUT&RUN in combination with JASPAR, transcriptomics, proteomics, patient survival and gene expression data to map genome-wide and promoter-associated DNA-binding and coregulatory transcription factor (coTF) profiles of TAp73α and DNp73β in melanoma cells. (3) Results: Systematic screening for motif enrichment in cancer hallmark gene sets revealed TAp73- and DNp73-specific coTF repertoires with distinct functions. We identified a coregulator signature for EMT genes enriched for both isoforms that has tumor context-dependent effects on survival and correlates with unfavorable patient prognosis. Of these EMT-associated coTFs, PATZ1 was validated as a novel direct interactor of DNp73β. (4) Conclusions: Our results provide a comprehensive reference map of p73 isoform-specific binding and coregulator recruitment and establish a workflow to model their influence on cancer reprogramming with implications for AI-based individualized therapy.
Kontakt
Institut für Experimentelle Gentherapie und Tumorforschung
Core-Facility Virale Vektor & Genom-Editing Technologien
Biomedizinisches Forschungszentrum
Schillingallee 69
D-18057 Rostock
Sekretariat
Ingrid Winkler
(+49) 381 494-5066(+49) 381 494-5062
ingrid.winkler@med.uni-rostock.de
Department Leben, Licht & Materie
Forschungsbau LL&M
Albert-Einstein-Str. 25
D-18059 Rostock
Forschungsbau LL&M
Albert-Einstein-Str. 25
D-18059 Rostock
