Post-translational modifications show mechanistic crosstalk, exemplified by the ADP-ribose–ubiquitin hybrid signal, in which one post-translational modification modifies another. This Comment highlights its discovery, mechanistic basis and functional consequences, and outlines critical questions for understanding this emerging signaling paradigm.
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Ubiquitin pathway blockade reveals endogenous ADP-ribosylation marking PARP7 and AHR for degradation
The EMBO Journal Open Access 01 December 2025
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Acknowledgements
We thank M. Suskiewicz, J. Ahel and R. Smith for comments. Work in K.Z.’s laboratory is supported by the Shanghai Pujiang Program (24PJD028). Work in I.A.’s laboratory is supported by the Wellcome Trust (223107 and 302632), the Biotechnology and Biological Sciences Research Council (BB/R007195/1 and BB/W016613/1), the Ovarian Cancer Research Alliance (813369), the Oxford University Challenge Seed Fund (USCF 456) and Cancer Research UK (C35050/A22284).
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Chatrin, C., Zhu, K. & Ahel, I. The rise of ADP-ribose–ubiquitin. Nat Struct Mol Biol 32, 1582–1585 (2025). https://doi.org/10.1038/s41594-025-01651-0
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DOI: https://doi.org/10.1038/s41594-025-01651-0