2CSN

BINARY COMPLEX OF CASEIN KINASE-1 WITH CKI7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

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 U S A 93: 6308-6313

  • DOI: 10.1073/pnas.93.13.6308
  • Primary Citation of Related Structures:  
    2CSN

  • PubMed Abstract: 
  • A large family of isoquinoline sulfonamide compounds inhibits protein kinases by competing with adenosine triphosphates(ATP), yet interferes little with the activity of other ATP-using enzymes such as ATPases and adenylate cyclases. One such compound, N-(2-aminoethyl)-5-chloroisoquinoline-8-sulfonamide (CK17), is selective for casein kinase-1 isolated from a variety of sources ...

    A large family of isoquinoline sulfonamide compounds inhibits protein kinases by competing with adenosine triphosphates(ATP), yet interferes little with the activity of other ATP-using enzymes such as ATPases and adenylate cyclases. One such compound, N-(2-aminoethyl)-5-chloroisoquinoline-8-sulfonamide (CK17), is selective for casein kinase-1 isolated from a variety of sources. Here we report the crystal structure of the catalytic domain of Schizosaccharomyces pombe casein kinase-1 complexed with CK17, refined to a crystallographic R-factor of 17.8% at 2.5 angstrom resolution. The structure provides new insights into the mechanism of the ATP-competing inhibition and the origin of their selectivity toward different protein kinases. Selectivity for protein kinases versus other enzymes is achieved by hydrophobic contacts and the hydrogen bond with isoquinoline ring. We propose that the hydrogen bond involving the ring nitrogen-2 atom of the isoquinoline must be preserved, but that the ring can flip depending on the chemical substituents at ring positions 5 and 8. Selectivity for individual members of the protein kinase family is achieved primarily by interactions with these substituents.


    Related Citations: 
    • Crystal Structure of Casein Kinase-1, a Phosphate-Directed Protein Kinase
      Xu, R.-M., Carmel, G., Sweet, R.M., Kuret, J., Chen, X.
      (1995) EMBO J 14: 1015
    • Expression, Purification, Crystallization, and Preliminary X-Ray Analysis of Casein Kinase-1 from Schizosaccharomyces Pombe
      Carmel, G., Leichus, B., Cheng, X., Patterson, S.D., Mirza, U., Chait, B.T., Kuret, J.
      (1994) J Biol Chem 269: 7304

    Organizational Affiliation

    W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CASEIN KINASE-1A297Schizosaccharomyces pombeMutation(s): 0 
EC: 2.7.1 (PDB Primary Data), 2.7.11.1 (UniProt)
UniProt
Find proteins for P40233 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore P40233 
Go to UniProtKB:  P40233
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40233
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CKI
Query on CKI

Download Ideal Coordinates CCD File 
D [auth A]N-(2-AMINOETHYL)-5-CHLOROISOQUINOLINE-8-SULFONAMIDE
C11 H12 Cl N3 O2 S
OGKYMFFYOWUTKV-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
CKI Binding MOAD:  2CSN Ki: 3.90e+4 (nM) from 1 assay(s)
PDBBind:  2CSN Ki: 3.90e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.1α = 90
b = 79.1β = 90
c = 120.04γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
HKLdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 1995-10-11 
  • Released Date: 1996-03-08 
  • Deposition Author(s): Xu, R.-M., Cheng, X.

Revision History  (Full details and data files)

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance