Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 68092.80 
• Atom Count: 4412 
• Residue Count: 590 
• Unique protein chains: 2

2VRW

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

• DOI: 10.2210/pdb2VRW/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens, Mus musculus
• Expression System: Escherichia coli BL21


• Deposited: 2008-04-16 Released: 2008-06-17 
• Deposition Author(s): Rapley, J., Tybulewicz, V., Rittinger, K.

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Experimental Data Snapshot

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

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

• PubMed: 18511940 
• 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 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.

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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
Molecule	Chains	Sequence Length	Organism	Details
RAS-RELATED C3 BOTULINUM TOXIN SUBSTRATE 1	A	184	Homo sapiens	Mutation(s): 0  Gene Names: RAC1 (TC25)
Find proteins for P63000 (Homo sapiens) Go to Gene View: RAC1 Go to UniProtKB:  P63000

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
PROTO-ONCOGENE VAV	B	406	Mus musculus	Mutation(s): 0  Gene Names: Vav1 (Vav)
Find proteins for P27870 (Mus musculus) Go to UniProtKB:  P27870

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

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 = 122.763	α = 90.00
b = 62.143	β = 118.80
c = 103.281	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
DEN	data reduction
REFMAC	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-04-16 
• Released Date: 2008-06-17 
• Deposition Author(s): Rapley, J., Tybulewicz, V., Rittinger, K.

Revision History 

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