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 

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.Mol.Biol. 5: 317-325


  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HCASK/LIN-2 PROTEIN
A, B
88Homo sapiensMutation(s): 0 
Gene Names: CASK (LIN2)
EC: 2.7.11.1
Find proteins for O14936 (Homo sapiens)
Go to Gene View: CASK
Go to UniProtKB:  O14936
Small Molecules
Ligands 1 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.251 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 40.800α = 90.00
b = 97.000β = 90.00
c = 92.000γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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