Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20.70 kDa 
• Atom Count: 1051 
• Residue Count: 132 
• Unique protein chains: 1

1OXZ

Crystal Structure of the Human GGA1 GAT domain

• DOI: 10.2210/pdb1OXZ/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2003-04-03 Released: 2003-04-15 
• Deposition Author(s): Zhu, G., Zhai, P., He, X., Terzyan, S., Zhang, R., Joachimiak, A., Tang, J., Zhang, X.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.285 
• R-Value Work: 0.241 
• R-Value Observed: 0.241 

Literature

Crystal Structure of Human GGA1 GAT Domain

Zhu, G., Zhai, P., He, X., Terzyan, S., Zhang, R., Joachimiak, A., Tang, J., Zhang, X.C.

(2003) Biochemistry 42: 6392-6399

• PubMed: 12767220 
• DOI: 10.1021/bi034334n
• Primary Citation of Related Structures:  
  1OXZ


• PubMed Abstract: 
  

GGAs are a family of vesicle-coating regulatory proteins that function in intracellular protein transport. A GGA molecule contains four domains, each mediating interaction with other proteins in carrying out intracellular transport. The GAT domain of GGAs has been identified as the structural entity that binds membrane-bound ARF, a molecular switch regulating vesicle-coat assembly. It also directly interacts with rabaptin5, an essential component of endosome fusion. A 2.8 A resolution crystal structure of the human GGA1 GAT domain is reported here. The GAT domain contains four helices and has an elongated shape with the longest dimension exceeding 80 A. Its longest helix is involved in two structural motifs: an N-terminal helix-loop-helix motif and a C-terminal three-helix bundle. The N-terminal motif harbors the most conservative amino acid sequence in the GGA GAT domains. Within this conserved region, a cluster of residues previously implicated in ARF binding forms a hydrophobic surface patch, which is likely to be the ARF-binding site. In addition, a structure-based mutagenesis-biochemical analysis demonstrates that the C-terminal three-helix bundle of this GAT domain is responsible for the rabaptin5 binding. These structural characteristics are consistent with a model supporting multiple functional roles for the GAT domain.

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Organizational Affiliation: 

Crystallography Research Program and Protein Studies Program, Oklahoma Medical Research Foundation, 825 Northeast 13th Street, Oklahoma City, Oklahoma 73104, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADP-ribosylation factor binding protein GGA1	A	186	Homo sapiens	Mutation(s): 0  Gene Names: GGA1
Find proteins for Q9UJY5 (Homo sapiens) Explore Q9UJY5  Go to UniProtKB:  Q9UJY5
NIH Common Fund Data Resources
PHAROS:  Q9UJY5 GTEx:  ENSG00000100083

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.285 
• R-Value Work: 0.241 
• R-Value Observed: 0.241 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 83.4	α = 90
b = 83.4	β = 90
c = 68.95	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-04-03 
• Released Date: 2003-04-15 
Deposition Author(s): Zhu, G., Zhai, P., He, X., Terzyan, S., Zhang, R., Joachimiak, A., Tang, J., Zhang, X.C.

Revision History 

• Version 1.0: 2003-04-15
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance