1XSZ

The structure of RalF


Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


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

  • 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 ...

    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.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
guanine nucleotide exchange proteinA, B356Legionella pneumophilaMutation(s): 0 
Gene Names: ralFC3927_09015
UniProt
Find proteins for Q8RT31 (Legionella pneumophila)
Explore Q8RT31 
Go to UniProtKB:  Q8RT31
Protein Feature View
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  • Reference Sequence
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 = 84.559α = 90
b = 84.559β = 90
c = 110.175γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • 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