3CM3

High Resolution Crystal Structure of the Vaccinia Virus Dual-Specificity Phosphatase VH1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.32 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Dimeric Quaternary Structure of the Prototypical Dual Specificity Phosphatase VH1.

Koksal, A.C.Nardozzi, J.D.Cingolani, G.

(2009) J.Biol.Chem. 284: 10129-10137

  • DOI: 10.1074/jbc.M808362200

  • PubMed Abstract: 
  • The Vaccinia virus H1 gene product, VH1, is a dual specificity phosphatase that down-regulates the cellular antiviral response by dephosphorylating STAT1. The crystal structure of VH1, determined at 1.32 A resolution, reveals a novel dimeric quaterna ...

    The Vaccinia virus H1 gene product, VH1, is a dual specificity phosphatase that down-regulates the cellular antiviral response by dephosphorylating STAT1. The crystal structure of VH1, determined at 1.32 A resolution, reveals a novel dimeric quaternary structure, which exposes two active sites spaced approximately 39 A away from each other. VH1 forms a stable dimer via an extensive domain swap of the N-terminal helix (residues 1-20). In vitro, VH1 can dephosphorylate activated STAT1, in a reaction that is competed by the nuclear transport adapter importin alpha5. Interestingly, VH1 is inactive with respect to STAT1 bound to DNA, suggesting that the viral phosphatase acts predominantly on the cytoplasmic pool of activated STAT1. We propose that the dimeric quaternary structure of VH1 is essential for specific recognition of activated STAT1, which prevents its nuclear translocation, thus blocking interferon-gamma signal transduction and antiviral response.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, SUNY Upstate Medical University, Syracuse, New York 13210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity protein phosphatase
A
176Vaccinia virus (strain Western Reserve)EC: 3.1.3.48, 3.1.3.-
Find proteins for P07239 (Vaccinia virus (strain Western Reserve))
Go to UniProtKB:  P07239
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
BME
Query on BME

Download SDF File 
Download CCD File 
A
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.32 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.171 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 63.816α = 90.00
b = 38.690β = 90.00
c = 134.987γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-02-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance