Discovery of a Potent and Selective Naphthyridine-Based Chemical Probe for Casein Kinase 2.
Davis-Gilbert, Z.W., Kramer, A., Dunford, J.E., Howell, S., Senbabaoglu, F., Wells, C.I., Bashore, F.M., Havener, T.M., Smith, J.L., Hossain, M.A., Oppermann, U., Drewry, D.H., Axtman, A.D.(2023) ACS Med Chem Lett 14: 432-441
- PubMed: 37077385 
- DOI: https://doi.org/10.1021/acsmedchemlett.2c00530
- Primary Citation of Related Structures:  
8BGC - PubMed Abstract: 
Naphthyridine-based inhibitors were synthesized to yield a potent and cell-active inhibitor of casein kinase 2 (CK2). Compound 2 selectively inhibits CK2α and CK2α' when profiled broadly, thereby making it an exquisitely selective chemical probe for CK2. A negative control that is structurally related but lacks a key hinge-binding nitrogen ( 7 ) was designed on the basis of structural studies. Compound 7 does not bind CK2α or CK2α' in cells and demonstrates excellent kinome-wide selectivity. Differential anticancer activity was observed when compound 2 was profiled alongside a structurally distinct CK2 chemical probe: SGC-CK2-1. This naphthyridine-based chemical probe ( 2 ) represents one of the best available small molecule tools with which to interrogate biology mediated by CK2.
Organizational Affiliation: 
Structural Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.