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 

wwPDB Validation 3D Report Full Report


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

  • 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 foll ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RAS-RELATED C3 BOTULINUM TOXIN SUBSTRATE 1
A
184Homo sapiensGene Names: RAC1 (TC25)
Find proteins for P63000 (Homo sapiens)
Go to Gene View: RAC1
Go to UniProtKB:  P63000
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTO-ONCOGENE VAV
B
406Mus musculusGene Names: Vav1 (Vav)
Find proteins for P27870 (Mus musculus)
Go to UniProtKB:  P27870
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
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 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 122.763α = 90.00
b = 62.143β = 118.80
c = 103.281γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
DENdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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