3DCG

Crystal Structure of the HIV Vif BC-box in Complex with Human ElonginB and ElonginC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insight into the human immunodeficiency virus Vif SOCS box and its role in human E3 ubiquitin ligase assembly

Stanley, B.J.Ehrlich, E.S.Short, L.Yu, Y.Xiao, Z.Yu, X.-F.Xiong, Y.

(2008) J.Virol. 82: 8656-8663

  • DOI: 10.1128/JVI.00767-08

  • PubMed Abstract: 
  • Human immunodeficiency virus (HIV) virion infectivity factor (Vif) causes the proteasome-mediated destruction of human antiviral protein APOBEC3G by tethering it to a cellular E3 ubiquitin ligase composed of ElonginB, ElonginC, Cullin5, and Rbx2. It ...

    Human immunodeficiency virus (HIV) virion infectivity factor (Vif) causes the proteasome-mediated destruction of human antiviral protein APOBEC3G by tethering it to a cellular E3 ubiquitin ligase composed of ElonginB, ElonginC, Cullin5, and Rbx2. It has been proposed that HIV Vif hijacks the E3 ligase through two regions within its C-terminal domain: a BC box region that interacts with ElonginC and a novel zinc finger motif that interacts with Cullin5. We have determined the crystal structure of the HIV Vif BC box in complex with human ElonginB and ElonginC. This complex presents direct structural evidence of the recruitment of a human ubiquitin ligase by a viral BC box protein that mimics the conserved interactions of cellular ubiquitin ligases. We further mutated conserved hydrophobic residues in a region downstream of the Vif BC box. These mutations demonstrate that this region, the Vif Cullin box, composes a third E3-ligase recruiting site critical for interaction between Vif and Cullin5. Furthermore, our homology modeling reveals that the Vif Cullin box and zinc finger motif may be positioned adjacent to the N terminus of Cullin5 for interaction with loop regions in the first cullin repeat of Cullin5.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06510, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transcription elongation factor B polypeptide 2
A, C
118Homo sapiensGene Names: TCEB2
Find proteins for Q15370 (Homo sapiens)
Go to UniProtKB:  Q15370
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription elongation factor B polypeptide 1
B, D
97Homo sapiensGene Names: TCEB1
Find proteins for Q15369 (Homo sapiens)
Go to UniProtKB:  Q15369
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Virion infectivity factor
E, F
39Human immunodeficiency virus type 1 group M subtype BGene Names: vif
Find proteins for P12504 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P12504
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.514α = 90.00
b = 66.913β = 90.00
c = 122.642γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
REFMACrefinement
SCALEPACKdata scaling
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-07-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance