7A1Z

Crystal structure of human protein kinase CK2alpha' (CSNK2A2 gene product) in complex with the ATP-competitive inhibitor 6-bromo-5-chloro-1H-triazolo[4,5-b]pyridine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.02 Å
  • R-Value Free: 0.147 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.135 

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Ligand Structure Quality Assessment 


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Literature

Synthesis, biological properties and structural study of new halogenated azolo[4,5-b]pyridines as inhibitors of CK2 kinase.

Chojnacki, K.Lindenblatt, D.Winska, P.Wielechowska, M.Toelzer, C.Niefind, K.Bretner, M.

(2021) Bioorg Chem 106: 104502-104502

  • DOI: https://doi.org/10.1016/j.bioorg.2020.104502
  • Primary Citation of Related Structures:  
    7A1B, 7A1Z, 7A22, 7A2H, 7A49, 7A4B, 7A4C

  • PubMed Abstract: 

    The new halogenated 1H-triazolo[4,5-b]pyridines and 1H-imidazo[4,5-b]pyridines were synthesised as analogues of known CK2 inhibitors: 4,5,6,7-tetrabromo-1H-benzotriazole (TBBt) and 4,5,6,7-tetrabromo-1H-benzimidazole (TBBi). Their influence on the activity of recombinant human CK2α, CK2α' and PIM1 kinases was determined. The most active inhibitors were di- and trihalogenated 1H-triazolo[4,5-b]pyridines (4a, 5a and 10a) with IC 50 values 2.56, 3.82 and 3.26 μM respectively for CK2α. Furthermore, effect on viability of cancer cell lines MCF-7 (human breast adenocarcinoma) and CCRF-CEM (T lymphoblast leukemia) of all final compounds was evaluated. Finally, three crystal structures of complexes of CK2α 1-335 with inhibitors 4a, 5a and 10a were obtained. In addition, new protocol was used to obtain high-resolution crystal structures of CK2α' Cys336Ser in complex with four inhibitors (4a, 5a, 5b, 10a).


  • Organizational Affiliation

    Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664 Warsaw, Poland. Electronic address: kchojnacki@ch.pw.edu.pl.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Casein kinase II subunit alpha'364Homo sapiensMutation(s): 0 
Gene Names: CSNK2A2CK2A2
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for P19784 (Homo sapiens)
Explore P19784 
Go to UniProtKB:  P19784
PHAROS:  P19784
GTEx:  ENSG00000070770 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19784
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
QWN (Subject of Investigation/LOI)
Query on QWN

Download Ideal Coordinates CCD File 
B [auth A]6-bromanyl-5-chloranyl-1~{H}-[1,2,3]triazolo[4,5-b]pyridine
C5 H2 Br Cl N4
SYWLFYJANXIUDW-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
G [auth A]
H [auth A]
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.02 Å
  • R-Value Free: 0.147 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.135 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.474α = 66.923
b = 47.612β = 89.637
c = 50.472γ = 89.024
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
Arcimboldophasing
PHENIXrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyNI 643/4-2

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-09
    Type: Initial release
  • Version 1.1: 2020-12-23
    Changes: Database references
  • Version 1.2: 2021-01-13
    Changes: Database references
  • Version 1.3: 2024-05-15
    Changes: Data collection, Database references