Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 79.92 kDa 
• Atom Count: 7160 
• Modelled Residue Count: 712 
• Deposited Residue Count: 712 
• Unique protein chains: 1

1XSZ

The structure of RalF

• PDB DOI: 10.2210/pdb1XSZ/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Legionella pneumophila
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-10-20 Released: 2004-11-02 
• Deposition Author(s): Amor, J.C., Swails, J., Roy, C.R., Nagai, H., Ingmundson, A., Cheng, X., Kahn, R.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.41 Å
• R-Value Free: 0.225 
• R-Value Work: 0.202 

Literature

The structure of RalF, an ADP-ribosylation factor guanine nucleotide exchange factor from Legionella pneumophila, reveals the presence of a cap over the active site

Amor, J.C., Swails, J., Zhu, X., Roy, C.R., Nagai, H., Ingmundson, A., Cheng, X., Kahn, R.A.

(2005) J Biol Chem 280: 1392-1400

• PubMed: 15520000 
• DOI: 10.1074/jbc.M410820200
• Primary Citation of Related Structures:  
  1XSZ, 1XT0


• PubMed Abstract: 
  

The Legionella pneumophila protein RalF is secreted into host cytosol via the Dot/Icm type IV transporter where it acts to recruit ADP-ribosylation factor (Arf) to pathogen-containing phagosomes in the establishment of a replicative organelle. The presence in RalF of the Sec7 domain, present in all Arf guanine nucleotide exchange factors, has suggested that recruitment of Arf is an early step in pathogenesis. We have determined the crystal structure of RalF and of the isolated Sec7 domain and found that RalF is made up of two domains. The Sec7 domain is homologous to mammalian Sec7 domains. The C-terminal domain forms a cap over the active site in the Sec7 domain and contains a conserved folding motif, previously observed in adaptor subunits of vesicle coat complexes. The importance of the capping domain and of the glutamate in the "glutamic finger," conserved in all Sec7 domains, to RalF functions was examined using three different assays. These data highlight the functional importance of domains other than Sec7 in Arf guanine nucleotide exchange factors to biological activities and suggest novel mechanisms of regulation of those activities.

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Organizational Affiliation: 

Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
guanine nucleotide exchange protein	A, B	356	Legionella pneumophila	Mutation(s): 0  Gene Names: ralF, C3927_09015
UniProt
Find proteins for Q8RT31 (Legionella pneumophila) Explore Q8RT31  Go to UniProtKB:  Q8RT31

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.41 Å
• R-Value Free: 0.225 
• R-Value Work: 0.202 
• Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.559	α = 90
b = 84.559	β = 90
c = 110.175	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
SOLVE	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-10-20 
• Released Date: 2004-11-02 
Deposition Author(s): Amor, J.C., Swails, J., Roy, C.R., Nagai, H., Ingmundson, A., Cheng, X., Kahn, R.A.

Revision History  

• Version 1.0: 2004-11-02
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance