3BJI

Structural Basis of Promiscuous Guanine Nucleotide Exchange by the T-Cell Essential Vav1

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


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


Literature

Structural basis of guanine nucleotide exchange mediated by the T-cell essential Vav1.

Chrencik, J.E., Brooun, A., Zhang, H., Mathews, I.I., Hura, G.L., Foster, S.A., Perry, J.J., Streiff, M., Ramage, P., Widmer, H., Bokoch, G.M., Tainer, J.A., Weckbecker, G., Kuhn, P.

(2008) J Mol Biol 380: 828-843

  • DOI: 10.1016/j.jmb.2008.05.024
  • Primary Citation of Related Structures:  
    3BJI

  • PubMed Abstract: 

    • The guanine nucleotide exchange factor (GEF) Vav1 plays an important role in T-cell activation and tumorigenesis. In the GEF superfamily, Vav1 has the ability to interact with multiple families of Rho GTPases. The structure of the Vav1 DH-PH-CRD/Rac1 complex to 2 ...

    The guanine nucleotide exchange factor (GEF) Vav1 plays an important role in T-cell activation and tumorigenesis. In the GEF superfamily, Vav1 has the ability to interact with multiple families of Rho GTPases. The structure of the Vav1 DH-PH-CRD/Rac1 complex to 2.6 A resolution reveals a unique intramolecular network of contacts between the Vav1 cysteine-rich domain (CRD) and the C-terminal helix of the Vav1 Dbl homology (DH) domain. These unique interactions stabilize the Vav1 DH domain for its intimate association with the Switch II region of Rac1 that is critical for the displacement of the guanine nucleotide. Small angle x-ray scattering (SAXS) studies support this domain arrangement for the complex in solution. Further, mutational analyses confirms that the atypical CRD is critical for maintaining both optimal guanine nucleotide exchange activity and broader specificity of Vav family GEFs. Taken together, the data outline the detailed nature of Vav1's ability to contact a range of Rho GTPases using a novel protein-protein interaction network.

    Organizational Affiliation: 

    Department of Cellular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proto-oncogene vavA, B378Homo sapiensMutation(s): 0 
Gene Names: VAV1, VAV
UniProt & NIH Common Fund Data Resources
Find proteins for P15498 (Homo sapiens)
Explore P15498 
Go to UniProtKB:  P15498
PHAROS:  P15498
GTEx:  ENSG00000141968 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15498
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ras-related C3 botulinum toxin substrate 1 precursorC, D177Homo sapiensMutation(s): 0 
Gene Names: RAC1, TC25, MIG5
EC: 3.6.5.2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63000 (Homo sapiens)
Explore P63000 
Go to UniProtKB:  P63000
PHAROS:  P63000
GTEx:  ENSG00000136238 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP63000
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.948α = 90
b = 75.079β = 103.87
c = 114.857γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
SHARPphasing

Structure Validation

View Full Validation Report



View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance