2XXN

Structure of the vIRF4-HAUSP TRAF domain complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Bilateral Inhibition of Hausp Deubiquitinase by a Viral Interferon Regulatory Factor Protein

Lee, H.R.Choi, W.C.Lee, S.Hwang, J.Hwang, E.Guchhait, K.Haas, J.Toth, Z.Jeon, Y.H.Oh, T.K.Kim, M.H.Jung, J.U.

(2011) Nat.Struct.Mol.Biol. 18: 1336

  • DOI: 10.1038/nsmb.2142

  • PubMed Abstract: 
  • Herpesvirus-associated ubiquitin-specific protease (HAUSP) regulates the stability of p53 and the p53-binding protein MDM2, implicating HAUSP as a therapeutic target for tuning p53-mediated antitumor activity. Here we report the structural analysis o ...

    Herpesvirus-associated ubiquitin-specific protease (HAUSP) regulates the stability of p53 and the p53-binding protein MDM2, implicating HAUSP as a therapeutic target for tuning p53-mediated antitumor activity. Here we report the structural analysis of HAUSP with Kaposi's sarcoma-associated herpesvirus viral interferon (IFN) regulatory factor 4 (vIRF4) and the discovery of two vIRF4-derived peptides, vif1 and vif2, as potent and selective HAUSP antagonists. This analysis reveals a bilateral belt-type interaction that results in inhibition of HAUSP. The vif1 peptide binds the HAUSP TRAF domain, competitively blocking substrate binding, whereas the vif2 peptide binds both the HAUSP TRAF and catalytic domains, robustly suppressing its deubiquitination activity. Peptide treatments comprehensively blocked HAUSP, leading to p53-dependent cell-cycle arrest and apoptosis in culture and to tumor regression in xenograft mouse model. Thus, the virus has developed a unique strategy to target the HAUSP-MDM2-p53 pathway, and these virus-derived short peptides represent biologically active HAUSP antagonists.


    Organizational Affiliation

    Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UBIQUITIN CARBOXYL-TERMINAL HYDROLASE 7
A
143Homo sapiensMutation(s): 0 
Gene Names: USP7 (HAUSP)
EC: 3.4.19.12
Find proteins for Q93009 (Homo sapiens)
Go to Gene View: USP7
Go to UniProtKB:  Q93009
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
K10
B
15Human herpesvirus 8 type P (isolate GK18)Mutation(s): 0 
Gene Names: vIRF-4
Find proteins for Q2HR73 (Human herpesvirus 8 type P (isolate GK18))
Go to UniProtKB:  Q2HR73
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.158 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 72.462α = 90.00
b = 72.462β = 90.00
c = 53.840γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-09
    Type: Initial release
  • Version 1.1: 2011-12-14
    Type: Database references
  • Version 1.2: 2012-03-28
    Type: Other