Targeted protein degradation with proteolysis targeting chimeras (PROTACs) is a powerful therapeutic modality for eliminating disease-causing proteins through targeted ubiquitination and proteasome-mediated degradation. Most PROTACs have exploited substrate receptors of Cullin-RING E3 ubiquitin ligases such as cereblon and VHL. Whether core, shared, and essential components of the Cullin-RING E3 ubiquitin ligase complex can be used for PROTAC applications remains less explored. Here, we discovered a cysteine-reactive covalent recruiter EN884 against the SKP1 adapter protein of the SKP1-CUL1-F-box containing the SCF complex. We further showed that this recruiter can be used in PROTAC applications to degrade neo-substrate proteins such as BRD4 and the androgen receptor in a SKP1- and proteasome-dependent manner. Our studies demonstrate that core and essential adapter proteins within the Cullin-RING E3 ubiquitin ligase complex can be exploited for targeted protein degradation applications and that covalent chemoproteomic strategies can enable recruiter discovery against these targets.
A blog highlighting recent publications in the area of covalent modification of proteins, particularly relating to covalent-modifier drugs. @CovalentMod on Twitter, @covalentmod@mstdn.science on Mastodon, and @covalentmod.bsky.social on BlueSky
Histidine-Covalent Stapled Alpha-Helical Peptides Targeting hMcl-1
Giulia Alboreggia, Parima Udompholkul, Carlo Baggio, Kendall Muzzarelli, Zahra Assar, and Maurizio Pellecchia Journal of Medicinal Chemistry...
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Linqi Cheng Yixian Wang, Yiming Guo, Sophie S. Zhang Han Xiao C ell Chemical Biology, 2024 Volume 31, 3, 428 - 445 https://doi.org/10.10...
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Cravatt, B.; Njomen, E.; Hayward, R.; DeMeester, K.; Ogasawara, D.; Dix, M.; Nguyen, T.; Ashby, P.; Simon, G.; Schreiber, S.; Melillo, B. C...
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Grob, N. M.; Remarcik, C.; Rössler, S. L.; Wong, J. Y. K.; Wang, J. C. K.; Tao, J.; Smith, C. L.; Loas, A.; Buchwald, S. L.; Eaton, D. L.; P...