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Updated: Aug 15, 2026

Identification of Novel CK2 Kinase Substrates Using a Versatile Biochemical Approach
Published on: February 21, 2019
Selective Inhibition of CK2: Emerging Strategies and Future Directions
Aryaman R Sokhal1, Sona Krajcovicova1,2, Jessica Iegre1
1Yusuf Hamied Department of Chemistry, University of Cambridge, CambridgeCB2 1EW, United Kingdom.
Developing selective inhibitors for Casein Kinase 2 (CK2) is crucial for treating cancer and neurodegenerative diseases. Novel strategies targeting the CK2α/β interface and the αD pocket have yielded promising dual-site inhibitors, with one now in clinical trials.
Area of Science:
- Biochemistry
- Molecular Biology
- Drug Discovery
Background:
- Casein Kinase 2 (CK2) is a serine/threonine kinase involved in various cellular processes and diseases.
- Its constitutive activity and complex structure pose challenges for selective inhibition.
- Targeting CK2 is a promising therapeutic strategy for cancer and neurodegeneration.
Purpose of the Study:
- To review and discuss complementary strategies for achieving selective CK2 inhibition.
- To highlight the development of small molecules and peptides targeting the CK2α/β interface.
- To explore the exploitation of the cryptic αD pocket for dual-site inhibitor design.
Main Methods:
- Small molecule inhibitors targeting the CK2α/β interface (e.g., CAM187, CAM7117, P8C9).
- Conformationally constrained peptides disrupting the CK2α/β interface.
- Dual-site inhibitor design exploiting the cryptic αD pocket (e.g., CAM4066, CAM4712, AB668, KDX1381, Biv5).
Main Results:
- CK2α/β-interface inhibitors demonstrated modulation of holoenzyme assembly and substrate phosphorylation.
- Validation of the αD pocket as a ligandable site enabled novel inhibitor development.
- Development of highly selective, subnanomolar dual-site inhibitors, including APL-5125.
Conclusions:
- Multiple strategies have been successfully employed for selective CK2 inhibition.
- The αD pocket offers a valuable target for advanced inhibitor design.
- APL-5125 represents a significant advancement, entering Phase 1/2 clinical trials for potential therapeutic applications.
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