3BJI

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.221 

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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proto-oncogene vav
A, B
378Homo sapiensMutation(s): 0 
Gene Names: VAV1 (VAV)
Find proteins for P15498 (Homo sapiens)
Go to Gene View: VAV1
Go to UniProtKB:  P15498
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ras-related C3 botulinum toxin substrate 1 precursor
C, D
177Homo sapiensMutation(s): 0 
Gene Names: RAC1 (TC25)
EC: 3.6.5.2
Find proteins for P63000 (Homo sapiens)
Go to Gene View: RAC1
Go to UniProtKB:  P63000
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.221 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 78.948α = 90.00
b = 75.079β = 103.87
c = 114.857γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SHARPphasing
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection

Structure Validation

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Entry History 

Deposition Data

Revision History 

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