Bcl-XL 3D Domain Swapped Dimer

Experimental Data Snapshot

  • Resolution: 3.45 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.261 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


BCL-X(L) Dimerization by Three-dimensional Domain Swapping.

O'Neill, J.W.Manion, M.K.Maguire, B.Hockenbery, D.M.

(2006) J Mol Biol 356: 367-381

  • DOI: https://doi.org/10.1016/j.jmb.2005.11.032
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Dimeric interactions among anti- and pro-apoptotic members of the BCL-2 protein family are dynamically regulated and intimately involved in survival and death functions. We report the structure of a BCL-X(L) homodimers a 3D-domain swapped dimer (3DDS). The X-ray crystal structure demonstrates the mutual exchange of carboxy-terminal regions including BH2 (Bcl-2 homology 2) between monomer subunits, with the hinge region occurring at the hairpin turn between the fifth and sixth alpha helices. Both BH3 peptide-binding hydrophobic grooves are unoccupied in the 3DDS dimer and available for BH3 peptide binding, as confirmed by sedimentation velocity analysis. BCL-X(L) 3DDS dimers have increased pore-forming activity compared to monomers, suggesting that 3DDS dimers may act as intermediates in membrane pore formation. Chemical crosslinking studies of Cys-substituted BCL-X(L) proteins demonstrate that 3DDS dimers form in synthetic lipid vesicles.

  • Organizational Affiliation

    Divisions of Clinical Research and Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Apoptosis regulator Bcl-X218Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q07817 (Homo sapiens)
Explore Q07817 
Go to UniProtKB:  Q07817
PHAROS:  Q07817
GTEx:  ENSG00000171552 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ07817
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.45 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.261 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.645α = 90
b = 92.645β = 90
c = 96.636γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-02-14
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2023-08-23
    Changes: Data collection, Database references, Refinement description