3MS6

Crystal structure of Hepatitis B X-Interacting Protein (HBXIP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.085 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Characterization of HBXIP: The Protein That Interacts with the Anti-Apoptotic Protein Survivin and the Oncogenic Viral Protein HBx.

Garcia-Saez, I.Lacroix, F.B.Blot, D.Gabel, F.Skoufias, D.A.

(2011) J.Mol.Biol. 405: 331-340

  • DOI: 10.1016/j.jmb.2010.10.046
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Hepatitis B X-interacting protein (HBXIP) is a ubiquitous protein that was originally identified as a binding partner of the hepatitis B viral protein HBx. HBXIP is also thought to serve as an anti-apoptotic cofactor of survivin, promoting the suppre ...

    Hepatitis B X-interacting protein (HBXIP) is a ubiquitous protein that was originally identified as a binding partner of the hepatitis B viral protein HBx. HBXIP is also thought to serve as an anti-apoptotic cofactor of survivin, promoting the suppression of pro-caspase-9 activation. Here were port the crystal structure of the shortest isoform of HBXIP (91 aa long,∼11 kDa) at 1.5 Å resolution. HBXIP crystal shows a monomer per asymmetric unit, with a profilin-like fold which is common to a super family of proteins, the Roadblock/LC7 domain family involved in protein-protein interactions. Based on this fold, we propose that HBXIP can form a dimer that can indeed be found in the crystal when symmetric molecules are generated around the asymmetric unit. This dimer shows an extended β-sheet area formed by 10 anti-parallel β-strands from both subunits. Another interesting aspect of the proposed HBXIP dimer interface is the presence of a small leucine zipper between the two α2 helices of each monomer. In solution, the scattering curve obtained by small-angle X-ray scattering for the sample used for crystallization indicates that the protein is dimeric form in solution. The fit between the experimental small angle X-ray scattering curve and the back calculated curves for two potential crystal dimers shows a significant preference for the Roadblock/LC7 fold dimer model. Moreover, the HBXIP crystal structure represents a step towards understanding the cellular role of HBXIP.


    Organizational Affiliation

    Institut de Biologie Structurale J.-P. Ebel, UMR 5075, Grenoble Cedex 1, France. isabel.garcia@ibs.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hepatitis B virus X-interacting protein
A
99Homo sapiensMutation(s): 0 
Gene Names: LAMTOR5 (HBXIP, XIP)
Find proteins for O43504 (Homo sapiens)
Go to Gene View: LAMTOR5
Go to UniProtKB:  O43504
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download SDF File 
Download CCD File 
A
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.085 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.191 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 48.997α = 90.00
b = 48.997β = 90.00
c = 71.644γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
SHARPphasing
DNAdata collection
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance