1S8F

Crystal structure of Rab9 complexed to GDP reveals a dimer with an active conformation of switch II

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.165 

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Literature

Crystal structure of Rab9 complexed to GDP reveals a dimer with an active conformation of switch II.

Wittmann, J.G., Rudolph, M.G.

(2004) FEBS Lett 568: 23-29

  • DOI: 10.1016/j.febslet.2004.05.004
  • Primary Citation of Related Structures:  
    1S8F

  • PubMed Abstract: 

    • The small GTPase Rab9 is an essential regulator of vesicular transport from the late endosome to the trans-Golgi network, as monitored by the redirection of the mannose-6-phosphate receptors. The crystal structure of Rab9 complexed to GDP, Mg(2+), and Sr(2+) reveals a unique dimer formed by an intermolecular beta-sheet that buries the switch I regions ...

    The small GTPase Rab9 is an essential regulator of vesicular transport from the late endosome to the trans-Golgi network, as monitored by the redirection of the mannose-6-phosphate receptors. The crystal structure of Rab9 complexed to GDP, Mg(2+), and Sr(2+) reveals a unique dimer formed by an intermolecular beta-sheet that buries the switch I regions. Surface area and shape complementarity calculations suggest that Rab9 dimers can form an inactive, membrane-bound pool of Rab9 . GDP that is independent of GDI. Mg(2+)-bound Rab9 represents an inactive state, but Sr(2+)-bound Rab9 . GDP displays activated switch region conformations, mimicking those of the GTP state. A hydrophobic tetrad is formed resembling an effector-discriminating epitope found only in GTP-bound Rab proteins.

    Organizational Affiliation: 

    Department of Molecular Structural Biology and GZMB, Justus-von-Liebig-Weg 11, Georg-August University, 37077 Göttingen, Germany.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras-related protein Rab-9AA, B177Canis lupus familiarisMutation(s): 0 
Gene Names: RAB9A, RAB9
UniProt
Find proteins for P24408 (Canis lupus familiaris)
Explore P24408 
Go to UniProtKB:  P24408
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24408
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.165 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.245α = 90
b = 98.245β = 90
c = 79.66γ = 90
Software Package:
Software NamePurpose
SHELXmodel building
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling
COMOphasing

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance