2B48

Bcl-XL 3D Domain Swapped Dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • 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 1.3 of the entry. See complete history


Literature

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: 10.1016/j.jmb.2005.11.032
  • Primary Citation of Related Structures:  
    2B48

  • 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 ...

    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.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Apoptosis regulator Bcl-XA218Homo sapiensMutation(s): 0 
Gene Names: BCL2L1BCL2LBCLX
Find proteins for Q07817 (Homo sapiens)
Explore Q07817 
Go to UniProtKB:  Q07817
NIH Common Fund Data Resources
PHAROS  Q07817
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • 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
CNSrefinement
SCALEPACKdata scaling
EPMRphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • 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