8PVP

Crystal structure of human Casein Kinase II subunit alpha (CK2a1) in complex with allosteric compound FGJG18

Summary for 8PVP

• Entry DOI: 10.2210/pdb8pvp/pdb
• Descriptor: Casein kinase II subunit alpha, ~{N}-[5-[(3-chloranyl-4-phenyl-phenyl)methylamino]pentyl]isoquinoline-5-sulfonamide, SULFATE ION, ... (4 entities in total)
• Functional Keywords: kinase, ck2, allosteric inhibitor, transferase
• Biological source: Homo sapiens (human)
• Total number of polymer chains: 2
• Total formula weight: 82892.87

Authors

Kraemer, A.,Greco, F.,Gerninghaus, J.,Knapp, S.,Structural Genomics Consortium (SGC) (deposition date: 2023-07-18, release date: 2023-09-20, Last modification date: 2024-08-07)

Primary citation

Greco, F.A.,Kramer, A.,Wahl, L.,Elson, L.,Ehret, T.A.L.,Gerninghaus, J.,Mockel, J.,Muller, S.,Hanke, T.,Knapp, S.
Synthesis and evaluation of chemical linchpins for highly selective CK2 alpha targeting.
Eur.J.Med.Chem., 276:116672-116672, 2024

PubMed Abstract: Casein kinase-2 (CK2) are serine/threonine kinases with dual co-factor (ATP and GTP) specificity, that are involved in the regulation of a wide variety of cellular functions. Small molecules targeting CK2 have been described in the literature targeting different binding pockets of the kinase with a focus on type I inhibitors such as the recently published chemical probe SGC-CK2-1. In this study, we investigated whether known allosteric inhibitors binding to a pocket adjacent to helix αD could be combined with ATP mimetic moieties defining a novel class of ATP competitive compounds with a unique binding mode. Linking both binding sites requires a chemical linking moiety that would introduce a 90-degree angle between the ATP mimetic ring system and the αD targeting moiety, which was realized using a sulfonamide. The synthesized inhibitors were highly selective for CK2 with binding constants in the nM range and low micromolar activity. While these inhibitors need to be further improved, the present work provides a structure-based design strategy for highly selective CK2 inhibitors.

PubMed: 39067440
DOI: 10.1016/j.ejmech.2024.116672

Experimental method

X-RAY DIFFRACTION (2.6 Å)