Crystal Structure of the Guanylate Kinase-like Domain of Human CASK

Experimental Data Snapshot

  • Resolution: 1.31 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural basis for nucleotide-dependent regulation of membrane-associated guanylate kinase-like domains.

Li, Y.Spangenberg, O.Paarmann, I.Konrad, M.Lavie, A.

(2002) J Biol Chem 277: 4159-4165

  • DOI: https://doi.org/10.1074/jbc.M110792200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    CASK is a member of the membrane-associated guanylate kinases (MAGUK) homologs, a family of proteins that scaffold protein complexes at particular regions of the plasma membrane by utilizing multiple protein-binding domains. The GK domain of MAGUKs, which shares high similarity in amino acid sequence with yeast guanylate kinase (yGMPK), is the least characterized MAGUK domain both in structure and function. In addition to its scaffolding function, the GK domain of hCASK has been shown to be involved in transcription regulation. Here we report the crystal structure of the GK domain of human CASK (hCASK-GK) at 1.3-A resolution. The structure rationalizes the inability of the GK domain to catalyze phosphoryl transfer and strongly supports its new function as a protein-binding module. Comparison of the hCASK-GK structure with the available crystal structures of yGMPK provides insight into possible conformational changes that occur in hCASK upon GMP binding. These conformational changes may act to regulate hCASK-GK function in a nucleotide-dependent manner.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Illinois at Chicago, 60607, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PERIPHERAL PLASMA MEMBRANE CASK180Homo sapiensMutation(s): 0 
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
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.31 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.341α = 90
b = 70.341β = 90
c = 74.861γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations