4MD8

Crystal Structure of full-length symmetric CK2 holoenzyme with mutated alpha subunit (F121E)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Active Form of the Protein Kinase CK2 alpha 2 beta 2 Holoenzyme Is a Strong Complex with Symmetric Architecture.

Lolli, G.Ranchio, A.Battistutta, R.

(2014) Acs Chem.Biol. 9: 366-371

  • DOI: 10.1021/cb400771y
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • CK2 is a protein kinase essential for cell viability whose activity is altered in several cancers. Its mechanisms of regulation differ from those common to other eukaryotic protein kinases and are not entirely established yet. Here we present crystal ...

    CK2 is a protein kinase essential for cell viability whose activity is altered in several cancers. Its mechanisms of regulation differ from those common to other eukaryotic protein kinases and are not entirely established yet. Here we present crystal structures of the monomeric form of the α2β2 holoenzyme that allow refining a formerly proposed structural model for activity regulation by oligomerization. Previous crystal structures of the CK2 holoenzyme show an asymmetric arrangement of the two α catalytic subunits around the obligate β2 regulatory subunits. Asymmetric α2β2 tetramers are organized in trimeric rings that correspond to inactive forms of the enzyme. The new crystal structures presented here reveal the symmetric architecture of the isolated active tetramers. The dimension and the nature of the α/β interfaces configure the holoenzyme as a strong complex that does not spontaneously dissociate in solution, in accordance with the low dissociation constant (∼4 nM).


    Organizational Affiliation

    Department of Chemical Sciences, University of Padua , via Marzolo 1, 35131 Padova, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Casein kinase II subunit beta
A, B, C, D
215Homo sapiensMutation(s): 0 
Gene Names: CSNK2B (CK2N, G5A)
Find proteins for P67870 (Homo sapiens)
Go to Gene View: CSNK2B
Go to UniProtKB:  P67870
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Casein kinase II subunit alpha
E, F, G, H
391Homo sapiensMutation(s): 1 
Gene Names: CSNK2A1 (CK2A1)
EC: 2.7.11.1
Find proteins for P68400 (Homo sapiens)
Go to Gene View: CSNK2A1
Go to UniProtKB:  P68400
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.222 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 141.518α = 90.00
b = 57.625β = 102.60
c = 185.685γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XSCALEdata scaling
SCALAdata scaling
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-20
    Type: Initial release
  • Version 1.1: 2014-03-05
    Type: Database references