1NAF

Crystal structure of the human GGA1 GAT domain

• PDB DOI: https://doi.org/10.2210/pdb1NAF/pdb

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


• Deposited: 2002-11-27 Released: 2003-03-25 
• Deposition Author(s): Collins, B.M., Watson, P.J., Owen, D.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.283 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 

Literature

The Structure of the GGA1-GAT Domain Reveals the Molecular Basis for ARF Binding and Membrane Association of GGAs

Collins, B.M., Watson, P.J., Owen, D.J.

(2003) Dev Cell 4: 321-332

• PubMed: 12636914 
• DOI: https://doi.org/10.1016/s1534-5807(03)00037-6
• Primary Citation of Related Structures:  
  1NAF


• PubMed Abstract: 
  

  The GGAs are a family of clathrin adaptor proteins involved in vesicular transport between the trans-Golgi network and endosomal system. Here we confirm reports that GGAs are targeted to the Golgi via interaction between the GGA-GAT domain and ARF-GTP, and we present the structure of the GAT domain of human GGA1, completing the structural description of the folded domains of GGA proteins. The GGA-GAT domain possesses an all alpha-helical fold with a "paper clip" topology comprising two independent subdomains. Structure-based mutagenesis demonstrates that ARF1-GTP binding by GGAs is exclusively governed by the N-terminal "hook" subdomain, and, using an in vitro recruitment assay, we show that ARF-GTP binding by this small structure is required and sufficient for Golgi targeting of GGAs.

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Organizational Affiliation: 

Department of Clinical Biochemistry, University of Cambridge, Hills Road, CB2 2XY, Cambridge, United Kingdom. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.41 kDa 
• Atom Count: 1,006 
• Modelled Residue Count: 124 
• Deposited Residue Count: 158 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADP-ribosylation factor binding protein GGA1	A	158	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UJY5 (Homo sapiens) Explore Q9UJY5  Go to UniProtKB:  Q9UJY5
PHAROS:  Q9UJY5 GTEx:  ENSG00000100083

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.283 
• R-Value Work: 0.248 
• R-Value Observed: 0.248 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.7	α = 90
b = 82.7	β = 90
c = 69.9	γ = 120

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
SHARP	phasing
CNS	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-03-25 
Deposition Author(s): Collins, B.M., Watson, P.J., Owen, D.J.

Revision History  

• Version 1.0: 2003-03-25
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-02-14
  Changes: Experimental preparation, Structure summary
• Version 1.4: 2024-10-16
  Changes: Data collection, Database references, Derived calculations, Structure summary