2EFC

Ara7-GDP/AtVps9a

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 

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This is version 1.2 of the entry. See complete history. 


Literature

GDP-bound and nucleotide-free intermediates of the guanine nucleotide exchange in the Rab5/Vps9 system

Uejima, T., Ihara, K., Goh, T., Ito, E., Sunada, M., Ueda, T., Nakano, A., Wakatsuki, S.

(2010) J Biol Chem 285: 36689-36697

  • DOI: 10.1074/jbc.M110.152132
  • Primary Citation of Related Structures:  
    2EFC, 2EFD, 2EFE, 2EFH

  • PubMed Abstract: 

    • Many GTPases regulate intracellular transport and signaling in eukaryotes. Guanine nucleotide exchange factors (GEFs) activate GTPases by catalyzing the exchange of their GDP for GTP. Here we present crystallographic and biochemical studies of a GEF reaction with four crystal structures of Arabidopsis thaliana ARA7, a plant homolog of Rab5 GTPase, in complex with its GEF, VPS9a, in the nucleotide-free and GDP-bound forms, as well as a complex with aminophosphonic acid-guanylate ester and ARA7·VPS9a(D185N) with GDP ...

    Many GTPases regulate intracellular transport and signaling in eukaryotes. Guanine nucleotide exchange factors (GEFs) activate GTPases by catalyzing the exchange of their GDP for GTP. Here we present crystallographic and biochemical studies of a GEF reaction with four crystal structures of Arabidopsis thaliana ARA7, a plant homolog of Rab5 GTPase, in complex with its GEF, VPS9a, in the nucleotide-free and GDP-bound forms, as well as a complex with aminophosphonic acid-guanylate ester and ARA7·VPS9a(D185N) with GDP. Upon complex formation with ARA7, VPS9 wedges into the interswitch region of ARA7, inhibiting the coordination of Mg(2+) and decreasing the stability of GDP binding. The aspartate finger of VPS9a recognizes GDP β-phosphate directly and pulls the P-loop lysine of ARA7 away from GDP β-phosphate toward switch II to further destabilize GDP for its release during the transition from the GDP-bound to nucleotide-free intermediates in the nucleotide exchange reaction.

    Organizational Affiliation: 

    Structural Biology Research Center, Institute of Material Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan. tamami.uejima@kek.jp



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Similarity to vacuolar protein sorting-associated protein VPS9A, C267Arabidopsis thalianaMutation(s): 0 
Gene Names: VPS9A, VPS9, At3g19770, MMB12.26
UniProt
Find proteins for Q9LT31 (Arabidopsis thaliana)
Explore Q9LT31 
Go to UniProtKB:  Q9LT31
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9LT31
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Small GTP-binding protein-likeB, D181Arabidopsis thalianaMutation(s): 0 
Gene Names: RABF2B, ARA-7, RAB5B, At4g19640, F24J7.190
UniProt
Find proteins for Q9SN68 (Arabidopsis thaliana)
Explore Q9SN68 
Go to UniProtKB:  Q9SN68
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9SN68
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
Download Ideal Coordinates CCD File 
E [auth B],
F [auth D]		GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.224 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.377α = 81.68
b = 58.474β = 86.89
c = 68.714γ = 72.97
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.2: 2011-12-21
    Changes: Database references