Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 42116.11 
• Atom Count: 2950 
• Residue Count: 360 
• Unique protein chains: 1

1HUR

HUMAN ADP-RIBOSYLATION FACTOR 1 COMPLEXED WITH GDP, FULL LENGTH NON-MYRISTOYLATED

• DOI: 10.2210/pdb1HUR/pdb

• Classification: PROTEIN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1995-04-19 Released: 1995-07-10 
• Deposition Author(s): Amor, J.C., Harrison, D.H., Kahn, R.A., Ringe, D.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.309 
• R-Value Work: 0.213 

Literature

Structure of the human ADP-ribosylation factor 1 complexed with GDP.

Amor, J.C., Harrison, D.H., Kahn, R.A., Ringe, D.

(1994) Nature 372: 704-708

• PubMed: 7990966 
• DOI: 10.1038/372704a0


• PubMed Abstract: 
  

ADP-ribosylation factors (ARFs) are essential and ubiquitous in eukaryotes, being involved in vesicular transport and functioning as an activator of phospholipase D (refs 1, 2) and cholera toxin. The functions of ARF proteins in membrane traffic and organelle integrity are intimately tied to its reversible association with membranes and specific interactions with membrane phospholipids. One common feature of these functions is their regulation by the binding and hydrolysis of GTP. Here we report the three-dimensional structure of full-length human ARF1 (M(r) 21,000) in its GDP-bound non-myristoylated form. The presence of a unique amino-terminal alpha-helix and loop, together with differences in Mg2+ ligation and the existence of a non-crystallographic dimer, set this structure apart from other GTP-binding proteins. These features provide a structural basis for the GTP-dependent modulation of membrane affinity, the lack of intrinsic GTPase activity, and the nature of effector binding surfaces.

---

Organizational Affiliation: 

Department of Biochemistry, Brandeis University, Waltham, Massachusetts 02254.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HUMAN ADP-RIBOSYLATION FACTOR 1	A, B	180	Homo sapiens	Gene Names: ARF1
Find proteins for P84077 (Homo sapiens) Go to Gene View: ARF1 Go to UniProtKB:  P84077

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GDP	A, B	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG	A, B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.309 
• R-Value Work: 0.213 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 121.010	α = 90.00
b = 45.920	β = 133.51
c = 91.780	γ = 90.00

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	phasing
XDS	data reduction
R-AXIS	data reduction
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-04-19 
• Released Date: 1995-07-10 
• Deposition Author(s): Amor, J.C., Harrison, D.H., Kahn, R.A., Ringe, D.

Revision History 

• Version 1.0: 1995-07-10
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance