GABA(A) receptor associated protein GABARAP

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

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This is version 1.2 of the entry. See complete history


The X-Ray Crystal Structure and Putative Ligand-Derived Peptide Binding Properties of Gamma-Aminobutyric Acid Receptor Type a Receptor-Associated Protein

Knight, D.Harris, R.Mcalister, M.Phelan, J.Geddes, S.Moss, S.Driscoll, P.C.Keep, N.H.

(2002) J Biol Chem 277: 5556

  • DOI: https://doi.org/10.1074/jbc.M109753200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The gamma-aminobutyric acid receptor type A (GABA(A)) receptor-associated protein (GABARAP) has been reported to mediate the interaction between the GABA(A) receptor and microtubules. We present the three-dimensional structure of GABARAP obtained by x-ray diffraction at 1.75 A resolution. The structure was determined by molecular replacement using the structure of the homologous protein GATE-16. NMR spectroscopy of isotope-labeled GABARAP showed the structure in solution to be compatible with the overall fold but showed evidence of conformation heterogeneity that is not apparent in the crystal structure. We assessed the binding of GABARAP to peptides derived from reported binding partner proteins, including the M3-M4 loop of the gamma2 subunit of the GABA(A) receptor and the acidic carboxyl-terminal tails of human alpha- and beta-tubulin. There is a small area of concentrated positive charge on one surface of GABARAP, which we found interacts weakly with all peptides tested, but we found no evidence for specific binding to the proposed physiological target peptides. These results are compatible with a more general role in membrane targeting and transportation for the GABARAP family of proteins.

  • Organizational Affiliation

    School of Crystallography, Birkbeck College, University of London, Malet Street, London WC1E 7HX, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GABARAP117Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O95166 (Homo sapiens)
Explore O95166 
Go to UniProtKB:  O95166
PHAROS:  O95166
GTEx:  ENSG00000170296 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95166
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
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Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.013α = 90
b = 55.124β = 90
c = 64.418γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description