4LHV

Crystal structure of Rab8 in its inactive GDP-bound form

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 

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This is version 1.1 of the entry. See complete history. 


Literature

Intermediates in the Guanine Nucleotide Exchange Reaction of Rab8 Protein Catalyzed by Guanine Nucleotide Exchange Factors Rabin8 and GRAB.

Guo, Z., Hou, X., Goody, R.S., Itzen, A.

(2013) J Biol Chem 288: 32466-32474

  • DOI: 10.1074/jbc.M113.498329
  • Primary Citation of Related Structures:  
    4LI0, 4LHX, 4LHY, 4LHZ, 4LHV, 4LHW

  • PubMed Abstract: 

    • Small G-proteins of the Ras superfamily control the temporal and spatial coordination of intracellular signaling networks by acting as molecular on/off switches. Guanine nucleotide exchange factors (GEFs) regulate the activation of these G-proteins throu ...

    Small G-proteins of the Ras superfamily control the temporal and spatial coordination of intracellular signaling networks by acting as molecular on/off switches. Guanine nucleotide exchange factors (GEFs) regulate the activation of these G-proteins through catalytic replacement of GDP by GTP. During nucleotide exchange, three distinct substrate·enzyme complexes occur: a ternary complex with GDP at the start of the reaction (G-protein·GEF·GDP), an intermediary nucleotide-free binary complex (G-protein·GEF), and a ternary GTP complex after productive G-protein activation (G-protein·GEF·GTP). Here, we show structural snapshots of the full nucleotide exchange reaction sequence together with the G-protein substrates and products using Rabin8/GRAB (GEF) and Rab8 (G-protein) as a model system. Together with a thorough enzymatic characterization, our data provide a detailed view into the mechanism of Rabin8/GRAB-mediated nucleotide exchange.

    Organizational Affiliation: 

    From the Department of Physical Biochemistry, Max Planck Institute of Molecular Physiology, 44227 Dortmund, Germany.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras-related protein Rab-8A A, B, C, D, E174Homo sapiensMutation(s): 0 
Gene Names: RAB8A, MEL, RAB8
Find proteins for P61006 (Homo sapiens)
Explore P61006 
Go to UniProtKB:  P61006
NIH Common Fund Data Resources
PHAROS:  P61006
GTEx:  ENSG00000167461
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.836α = 90
b = 75.95β = 98.44
c = 106.618γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
PHASESphasing
REFMACrefinement
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-09
    Type: Initial release
  • Version 1.1: 2013-12-18
    Changes: Database references