Interactome Rewiring Following Pharmacological Targeting of BET Bromodomains.Lambert, J.P., Picaud, S., Fujisawa, T., Hou, H., Savitsky, P., Uuskula-Reimand, L., Gupta, G.D., Abdouni, H., Lin, Z.Y., Tucholska, M., Knight, J.D.R., Gonzalez-Badillo, B., St-Denis, N., Newman, J.A., Stucki, M., Pelletier, L., Bandeira, N., Wilson, M.D., Filippakopoulos, P., Gingras, A.C.
(2019) Mol Cell 73: 621-638.e17
- PubMed: 30554943
- DOI: 10.1016/j.molcel.2018.11.006
- Structures With Same Primary Citation
- PubMed Abstract:
Targeting bromodomains (BRDs) of the bromo-and-extra-terminal (BET) family offers opportunities for therapeutic intervention in cancer and other diseases. Here, we profile the interactomes of BRD2, BRD3, BRD4, and BRDT following treatment with the pa ...
Targeting bromodomains (BRDs) of the bromo-and-extra-terminal (BET) family offers opportunities for therapeutic intervention in cancer and other diseases. Here, we profile the interactomes of BRD2, BRD3, BRD4, and BRDT following treatment with the pan-BET BRD inhibitor JQ1, revealing broad rewiring of the interaction landscape, with three distinct classes of behavior for the 603 unique interactors identified. A group of proteins associate in a JQ1-sensitive manner with BET BRDs through canonical and new binding modes, while two classes of extra-terminal (ET)-domain binding motifs mediate acetylation-independent interactions. Last, we identify an unexpected increase in several interactions following JQ1 treatment that define negative functions for BRD3 in the regulation of rRNA synthesis and potentially RNAPII-dependent gene expression that result in decreased cell proliferation. Together, our data highlight the contributions of BET protein modules to their interactomes allowing for a better understanding of pharmacological rewiring in response to JQ1.
Lunenfeld-Tanenbaum Research Institute at Mount Sinai Hospital, Toronto, ON M5G 1X5, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada. Electronic address: firstname.lastname@example.org.