2VRW

Critical structural role for the PH and C1 domains of the Vav1 exchange factor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

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


Literature

Crucial Structural Role for the Ph and C1 Domains of the Vav1 Exchange Factor.

Rapley, J., Tybulewicz, V., Rittinger, K.

(2008) EMBO Rep 9: 655

  • DOI: 10.1038/embor.2008.80
  • Primary Citation of Related Structures:  
    2VRW

  • PubMed Abstract: 

    • The Vav family of proteins are guanine nucleotide exchange factors (GEFs) for the Rho family of GTPases, which regulate various cellular functions, including T-cell activation. They contain a catalytic Dbl homology (DH) domain that is invariably followed by a pleckstrin homology (PH) domain, which is often required for catalytic activity ...

    The Vav family of proteins are guanine nucleotide exchange factors (GEFs) for the Rho family of GTPases, which regulate various cellular functions, including T-cell activation. They contain a catalytic Dbl homology (DH) domain that is invariably followed by a pleckstrin homology (PH) domain, which is often required for catalytic activity. Vav proteins are the first GEFs for which an additional C1 domain is required for full biological activity. Here, we present the structure of a Vav1 fragment comprising the DH-PH-C1 domains bound to Rac1. This structure shows that the PH and C1 domains form a single structural unit that packs against the carboxy-terminal helix of the DH domain to stabilize its conformation and to promote nucleotide exchange. In contrast to previous reports, this structure shows that there are no direct contacts between the GTPase and C1 domain but instead suggests new mechanisms for the regulation of Vav1 activity.

    Organizational Affiliation: 

    Division of Molecular Structure, and National Institute for Medical Research, The Ridgeway, London NW7 1AA, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RAS-RELATED C3 BOTULINUM TOXIN SUBSTRATE 1A184Homo sapiensMutation(s): 0 
Gene Names: RAC1, TC25, MIG5
EC: 3.6.5.2
Find proteins for P63000 (Homo sapiens)
Explore P63000 
Go to UniProtKB:  P63000
NIH Common Fund Data Resources
PHAROS:  P63000
GTEx:  ENSG00000136238
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTO-ONCOGENE VAVB406Mus musculusMutation(s): 0 
Gene Names: Vav1, Vav
Find proteins for P27870 (Mus musculus)
Explore P27870 
Go to UniProtKB:  P27870
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download Ideal Coordinates CCD File 
 C [auth B], D [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.763α = 90
b = 62.143β = 118.8
c = 103.281γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance