Crystal structure of human protein kinase CK2alpha (CSNK2A1 gene product) in complex with the 2-aminothiazole-type inhibitor 17

Experimental Data Snapshot

  • Resolution: 1.76 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 

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Structural and Mechanistic Basis of the Inhibitory Potency of Selected 2-Aminothiazole Compounds on Protein Kinase CK2.

Lindenblatt, D.Nickelsen, A.Applegate, V.M.Jose, J.Niefind, K.

(2020) J Med Chem 63: 7766-7772

  • DOI: https://doi.org/10.1021/acs.jmedchem.0c00587
  • Primary Citation of Related Structures:  
    6TE2, 6TEI, 6TEW, 6TGU

  • PubMed Abstract: 

    Selective inhibitors of protein kinase CK2 with significant cytotoxicity on tumor cells based on a 2-aminothiazole scaffold were described recently. Here, these studies are supplemented with representative CK2α/CK2α' complex structures. They reveal that the 2-aminothiazole-based inhibitors occupy the ATP cavity, whereas preliminary data had indicated an allosteric binding site. The crystal structure findings are corroborated by subsequent enzyme kinetic studies; their atomic-resolution quality provides the basis for future optimization of these promising CK2 inhibitors.

  • Organizational Affiliation

    Department für Chemie, Institut für Biochemie, Universität zu Köln, Zülpicher Str. 47, D-50674 Köln, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Casein kinase II subunit alpha
A, B
349Homo sapiensMutation(s): 0 
Gene Names: CSNK2A1CK2A1
UniProt & NIH Common Fund Data Resources
Find proteins for P68400 (Homo sapiens)
Explore P68400 
Go to UniProtKB:  P68400
PHAROS:  P68400
GTEx:  ENSG00000101266 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68400
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.76 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.891α = 90
b = 127.891β = 90
c = 124.334γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
autoPROCdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyNI 643/4-2

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-08
    Type: Initial release
  • Version 1.1: 2020-08-05
    Changes: Database references, Refinement description
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description