1EH4

BINARY COMPLEX OF CASEIN KINASE-1 FROM S. POMBE WITH AN ATP COMPETITIVE INHIBITOR, IC261


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structure of a Conformation-Selective Casein Kinase-1 Inhibitor

Mashhoon, N.Demaggio, A.J.Tereshko, V.Bergmeier, S.C.Egli, M.Hoekstra, M.F.Kuret, J.

(2000) J.Biol.Chem. 275: 20052-20060

  • DOI: 10.1074/jbc.M001713200

  • PubMed Abstract: 
  • Members of the casein kinase-1 family of protein kinases play an essential role in cell regulation and disease pathogenesis. Unlike most protein kinases, they appear to function as constitutively active enzymes. As a result, selective pharmacological ...

    Members of the casein kinase-1 family of protein kinases play an essential role in cell regulation and disease pathogenesis. Unlike most protein kinases, they appear to function as constitutively active enzymes. As a result, selective pharmacological inhibitors can play an important role in dissection of casein kinase-1-dependent processes. To address this need, new small molecule inhibitors of casein kinase-1 acting through ATP-competitive and ATP-noncompetitive mechanisms were isolated on the basis of in vitro screening. Here we report the crystal structure of 3-[(2,4,6-trimethoxyphenyl) methylidenyl]-indolin-2-one (IC261), an ATP-competitive inhibitor with differential activity among casein kinase-1 isoforms, in complex with the catalytic domain of fission yeast casein kinase-1 refined to a crystallographic R-factor of 22.4% at 2.8 A resolution. The structure reveals that IC261 stabilizes casein kinase-1 in a conformation midway between nucleotide substrate liganded and nonliganded conformations. We propose that adoption of this conformation by casein kinase-1 family members stabilizes a delocalized network of side chain interactions and results in a decreased dissociation rate of inhibitor.


    Related Citations: 
    • Structural Basis for Selectivity of the Isoquinoline Sulfonamide Family of Protein Kinase Inhibitors
      Xu, R.M.,Carmel, G.,Kuret, J.,Cheng, X.
      (1996) Proc.Natl.Acad.Sci.USA 93: 6308
    • Crystal Structure of Casein Kinase-1, a Phosphate-directed Protein Kinase
      Xu, R.M.,Carmel, G.,Sweet, R.M.,Kuret, J.,Cheng, X.
      (1995) Embo J. 14: 1015


    Organizational Affiliation

    Center for Biotechnology, Ohio State University College of Medicine, Columbus, Ohio 43210, ICOS Corporation, Bothell, Washington 98021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CASEIN KINASE-1
A, B
298Schizosaccharomyces pombe (strain 972 / ATCC 24843)Gene Names: cki1
EC: 2.7.11.1
Find proteins for P40233 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  P40233
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
IC1
Query on IC1

Download SDF File 
Download CCD File 
A, B
3-[(2,4,6-TRIMETHOXY-PHENYL)-METHYLENE]-INDOLIN-2-ONE
IC261
C18 H17 N O4
JBJYTZXCZDNOJW-JLHYYAGUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.224 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 113.500α = 90.00
b = 113.500β = 90.00
c = 110.400γ = 120.00
Software Package:
Software NamePurpose
bioteXdata scaling
bioteXdata reduction
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description