3JZA

Crystal structure of human Rab1b in complex with the GEF domain of DrrA/SidM from Legionella pneumophila


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

RabGDI displacement by DrrA from Legionella is a consequence of its guanine nucleotide exchange activity.

Schoebel, S.Oesterlin, L.K.Blankenfeldt, W.Goody, R.S.Itzen, A.

(2009) Mol.Cell 36: 1060-1072

  • DOI: 10.1016/j.molcel.2009.11.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Prenylated Rab proteins exist in the cytosol as soluble, high-affinity complexes with GDI that need to be disrupted for membrane attachment and targeting of Rab proteins. The Legionella pneumophila protein DrrA displaces GDI from Rab1:GDI complexes, ...

    Prenylated Rab proteins exist in the cytosol as soluble, high-affinity complexes with GDI that need to be disrupted for membrane attachment and targeting of Rab proteins. The Legionella pneumophila protein DrrA displaces GDI from Rab1:GDI complexes, incorporating Rab1 into Legionella-containing vacuoles and activating Rab1 by exchanging GDP for GTP. Here, we present the crystal structure of a complex between the GEF domain of DrrA and Rab1 and a detailed kinetic analysis of this exchange. DrrA efficiently catalyzes nucleotide exchange and mimics the general nucleotide exchange mechanism of mammalian GEFs for Ras-like GTPases. We show that the GEF activity of DrrA is sufficient to displace prenylated Rab1 from the Rab1:GDI complex. Thus, apparent GDI displacement by DrrA is linked directly to nucleotide exchange, suggesting a basic model for GDI displacement and specificity of Rab localization that does not require discrete GDI displacement activity.


    Related Citations: 
    • Legionella pneumophila proteins that regulate Rab1 membrane cycling.
      Ingmundson, A.,Delprato, A.,Lambright, D.G.,Roy, C.R.
      (2007) Nature 450: 365
    • A bifunctional bacterial protein links GDI displacement to Rab1 activation.
      Machner, M.P.,Isberg, R.R.
      (2007) Science 318: 974


    Organizational Affiliation

    Department of Physical Biochemistry, Max Planck Institute of Molecular Physiology, Dortmund, NRW, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ras-related protein Rab-1B
A
175Homo sapiensMutation(s): 0 
Gene Names: RAB1B
Find proteins for Q9H0U4 (Homo sapiens)
Go to Gene View: RAB1B
Go to UniProtKB:  Q9H0U4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein DrrA
B
197Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513)Mutation(s): 0 
Gene Names: drrA (sidM)
Find proteins for Q5ZSQ3 (Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513))
Go to UniProtKB:  Q5ZSQ3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.201 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 100.756α = 90.00
b = 100.756β = 90.00
c = 146.360γ = 120.00
Software Package:
Software NamePurpose
DMphasing
XDSdata reduction
REFMACrefinement
PDB_EXTRACTdata extraction
XSCALEdata scaling
MAR345data collection
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-19
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description