Crystal structure of human GGA1 GAT domain

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 

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This is version 1.3 of the entry. See complete history


Molecular Mechanism of Membrane Recruitment of Gga by Arf in Lysosomal Protein Transport

Shiba, T.Kawasaki, M.Takatsu, H.Nogi, T.Matsugaki, N.Igarashi, N.Suzuki, M.Kato, R.Nakayama, K.Wakatsuki, S.

(2003) Nat Struct Biol 10: 386-393

  • DOI: https://doi.org/10.1038/nsb920
  • Primary Citation of Related Structures:  
    1J2J, 1O3X, 1O3Y

  • PubMed Abstract: 

    GGAs are critical for trafficking soluble proteins from the trans-Golgi network (TGN) to endosomes/lysosomes through interactions with TGN-sorting receptors, ADP-ribosylation factor (ARF) and clathrin. ARF-GTP bound to TGN membranes recruits its effector GGA by binding to the GAT domain, thus facilitating recognition of GGA for cargo-loaded receptors. Here we report the X-ray crystal structures of the human GGA1-GAT domain and the complex between ARF1-GTP and the N-terminal region of the GAT domain. When unbound, the GAT domain forms an elongated bundle of three a-helices with a hydrophobic core. Structurally, this domain, combined with the preceding VHS domain, resembles CALM, an AP180 homolog involved in endocytosis. In the complex with ARF1-GTP, a helix-loop-helix of the N-terminal part of GGA1-GAT interacts with the switches 1 and 2 of ARF1 predominantly in a hydrophobic manner. These data reveal a molecular mechanism underlying membrane recruitment of adaptor proteins by ARF-GTP.

  • Organizational Affiliation

    Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ADP-ribosylation factor binding protein GGA1140Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UJY5 (Homo sapiens)
Explore Q9UJY5 
Go to UniProtKB:  Q9UJY5
GTEx:  ENSG00000100083 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UJY5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.11α = 90
b = 85.11β = 90
c = 59.001γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
RESOLVEmodel building
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-05-20
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-12-27
    Changes: Data collection, Database references