1KWA

HUMAN CASK/LIN-2 PDZ DOMAIN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.251 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of the hCASK PDZ domain reveals the structural basis of class II PDZ domain target recognition

Daniels, D.L., Cohen, A.R., Anderson, J.M., Brunger, A.T.

(1998) Nat Struct Biol 5: 317-325

  • DOI: 10.1038/nsb0498-317
  • Primary Citation of Related Structures:  
    1KWA

  • PubMed Abstract: 

    • PDZ domain containing proteins assist formation of cell-cell junctions and localization of membrane protein receptors and ion channels. PDZ domains interact with the C-terminal residues of a particular target membrane protein. Based on their binding specificities and sequence homologies, PDZ domains fall into two classes ...

    PDZ domain containing proteins assist formation of cell-cell junctions and localization of membrane protein receptors and ion channels. PDZ domains interact with the C-terminal residues of a particular target membrane protein. Based on their binding specificities and sequence homologies, PDZ domains fall into two classes. The first crystal structure of a class II PDZ domain, that of hCASK, has been solved by multi-wavelength anomalous dispersion phasing. Complex formation with the C-terminus of a neighboring non-crystallographically related PDZ domain reveals interactions between hCASK and its ligand. Class II PDZ domains differ from class I domains by formation of a second hydrophobic binding pocket. The C-terminal carboxylate binding loop of the PDZ domain is structurally conserved in both classes suggesting a generalized carboxylate binding motif (h-Gly-h) where h is a hydrophobic residue.

    Related Citations: 
    • Crystal Structures of a Complexed and Peptide-Free Membrane Protein-Binding Domain: Molecular Basis of Peptide Recognition by Pdz
      Doyle, D.A., Lee, A., Lewis, J., Kim, E., Sheng, M., Mackinnon, R.
      (1996) Cell 85: 1067
    Organizational Affiliation: 

    The Howard Hughes Medical Institute and Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HCASK/LIN-2 PROTEINA, B88Homo sapiensMutation(s): 0 
Gene Names: HCASK, CASK, LIN2
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O14936 (Homo sapiens)
Explore O14936 
Go to UniProtKB:  O14936
PHAROS:  O14936
GTEx:  ENSG00000147044 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14936
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth B]		SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.251 
  • R-Value Observed: 0.251 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.8α = 90
b = 97β = 90
c = 92γ = 90

Structure Validation

View Full Validation Report



View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance