ISDA

Entry Detail

PDB ID:

5OWH

Keywords:

TRANSFERASE

Title:

High salt structure of human protein kinase CK2alpha in complex with 3-aminopropyl-4,5,6,7-tetrabromobenzimidazol

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2017-09-01

Release Date:

2018-07-25

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.30 Å

R-Value Free:

0.26

R-Value Work:

0.21

R-Value Observed:

0.22

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Casein kinase II subunit alpha
Chain IDs:A
Chain Length:335
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P68400 Pfam ID:PF00069 EC:2.7.11.1

Ligand Molecules

B0K

Primary Citation

Biological properties and structural study of new aminoalkyl derivatives of benzimidazole and benzotriazole, dual inhibitors of CK2 and PIM1 kinases.

Chojnacki, K, Winska, P, Wielechowska, M, Lukowska-Chojnacka, E, Tolzer, C, Niefind, K, Bretner, M, Bischoff, N, Raaf, J, Olsen, B, Bretner, M, Issinger, O.G, Niefind, K, Bischoff, N, Olsen, B, Raaf, J, Bretner, M, Issinger, O.G, Niefind, K, Ermakova, I, Boldyreff, B, Issinger, O.G, Niefind, K.Show

Bioorg. Chem. 80 266 275 (2018)

PMID: 29966873 DOI: 10.1016/j.bioorg.2018.06.022

Abstact

The new aminoalkyl-substituted derivatives of known CK2 inhibitors 4,5,6,7-tetrabromo-1H-benzimidazole (TBBi) and 4,5,6,7-tetrabromo-1H-benzotriazole (TBBt) were synthesized, and their influence on the activity of recombinant human CK2 α, CK2 holoenzyme and PIM1 kinases was evaluated. All derivatives inhibited the activity of studied kinases and the most efficient were aminopropyl-derivatives 8b and 14b. These compounds also exerted inhibition of cancer cell lines - CCRF-CEM (acute lymphoblastoid leukemia), MCF-7 (human breast cancer), and PC-3 (prostate cancer) proliferation and their EC50 is comparable with the value for clinically studied CK2 inhibitor CX-4945. Preliminary structure activity relationship analysis indicated that the spacer length affected antitumor potency, and two to three methylene units were more favorable. The complex of CK2 α1-335/8b was crystallized, both under high-salt conditions and under low-salt conditions giving crystals which diffracted X-rays to about 2.4 Å resolution, what enabled the determination of the corresponding 3D-structures.

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