1PBV

SEC7 DOMAIN OF THE EXCHANGE FACTOR ARNO


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1038/32210

  • 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 G ...

    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.


    Organizational Affiliation

    Laboratoire d'Enzymologie et Biochimie Structurales, CNRS UPR 9063, Gif-sur-Yvette, France. cherfils@lebs.cnrs-gif.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ARNO
A
195Homo sapiensGene Names: CYTH2 (ARNO, PSCD2, PSCD2L)
Find proteins for Q99418 (Homo sapiens)
Go to Gene View: CYTH2
Go to UniProtKB:  Q99418
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.182 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 89.766α = 90.00
b = 89.766β = 90.00
c = 89.766γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
SCALEPACKdata scaling
SHARPphasing
DENZOdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-09
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance