ArticleBeilstein journal of organic chemistry2026
Towards the targeted protein degradation of CK2: design and synthesis of CAM4066-based PROTACs.
Article in Beilstein journal of organic chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Human protein kinase CK2 is a constitutively active serine/threonine kinase implicated in numerous cancers. Although ATP-competitive inhibitors such as CX-4945 show therapeutic potential, they are limited by off-target effects and incomplete or transient CK2 suppression. PROTACs offer an alternative strategy by inducing proteasome-mediated degradation, with potential advantages in potency, selectivity, and duration of action. Herein, a series of CK2-targeting PROTACs has been designed and synthesised. By conjugating a CAM4066-derived warhead to CRBN or VHL ligands, four VHL-recruiting PROTACs, were prepared using PEG and alkyl linkers, alongside two CRBN-recruiting analogues featuring constrained linkers. A ligand-linker analogue in which a linker is projected from the solvent-exposed region of CK2α retained binding affinity comparable to CAM4066, confirming that linker installation is tolerated and preserves key interactions in the αD and ATP sites.
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