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: 22.46 kDa 
• Atom Count: 1712 
• Residue Count: 195 
• Unique protein chains: 1

1PBV

SEC7 DOMAIN OF THE EXCHANGE FACTOR ARNO

• DOI: 10.2210/pdb1PBV/pdb

• Classification: EXCHANGE FACTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-01-15 Released: 1999-03-09 
• Deposition Author(s): Cherfils, J., Menetrey, J., Mathieu, M., Le Bras, G., Robineau, S., Beraud-Dufour, S., Antonny, B., Chardin, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.226 
• R-Value Work: 0.182 
• R-Value Observed: 0.182 

Literature

Structure of the Sec7 domain of the Arf exchange factor ARNO.

Cherfils, J., Menetrey, J., Mathieu, M., Le Bras, G., Robineau, S., Beraud-Dufour, S., Antonny, B., Chardin, P.

(1998) Nature 392: 101-105

• PubMed: 9510256 
• DOI: 10.1038/32210
• Primary Citation of Related Structures:  
  1PBV


• PubMed Abstract: 
  

Small G proteins switch from a resting, GDP-bound state to an active, GTP-bound state. As spontaneous GDP release is slow, guanine-nucleotide-exchange factors (GEFs) are required to promote fast activation of small G proteins through replacement of GDP with GTP in vivo. Families of GEFs with no sequence similarity to other GEF families have now been assigned to most families of small G proteins. In the case of the small G protein Arf1, the exchange of bound GDP for GTP promotes the coating of secretory vesicles in Golgi traffic. An exchange factor for human Arf1, ARNO, and two closely related proteins, named cytohesin 1 and GPS1, have been identified. These three proteins are modular proteins with an amino-terminal coiled-coil, a central Sec7-like domain and a carboxy-terminal pleckstrin homology domain. The Sec7 domain contains the exchange-factor activity. It was first found in Sec7, a yeast protein involved in secretion, and is present in several other proteins, including the yeast exchange factors for Arf, Geal and Gea2. Here we report the crystal structure of the Sec7 domain of human ARNO at 2 A resolution and the identification of the site of interaction of ARNO with Arf.

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Organizational Affiliation: 

Laboratoire d'Enzymologie et Biochimie Structurales, CNRS UPR 9063, Gif-sur-Yvette, France. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ARNO	A	195	Homo sapiens	Mutation(s): 0  Gene Names: CYTH2, ARNO, PSCD2, PSCD2L
Find proteins for Q99418 (Homo sapiens) Explore Q99418  Go to UniProtKB:  Q99418
NIH Common Fund Data Resources
PHAROS:  Q99418 GTEx:  ENSG00000105443

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.226 
• R-Value Work: 0.182 
• R-Value Observed: 0.182 
• Space Group: P 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 89.766	α = 90
b = 89.766	β = 90
c = 89.766	γ = 90

Software Package:

Software Name	Purpose
SHARP	phasing
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-01-15 
• Released Date: 1999-03-09 
Deposition Author(s): Cherfils, J., Menetrey, J., Mathieu, M., Le Bras, G., Robineau, S., Beraud-Dufour, S., Antonny, B., Chardin, P.

Revision History 

• Version 1.0: 1999-03-09
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-04-04
  Changes: Data collection