Crystal structure of mouse Bcl-xl

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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This is version 1.3 of the entry. See complete history


The structure of a Bcl-xl/Bim fragment complex: Implications for Bim function

Liu, X.Dai, S.Zhu, Y.Marrack, P.Kappler, J.W.

(2003) Immunity 19: 341-352

  • DOI: https://doi.org/10.1016/s1074-7613(03)00234-6
  • Primary Citation of Related Structures:  
    1PQ0, 1PQ1

  • PubMed Abstract: 

    After antigen-driven expansion, the majority of T cells involved in an immune response die rapidly by apoptosis dependent on the Bcl-2 related proteins, Bim and Bax or Bak. The details of how these proteins are activated and interact are still unclear. The crystal structure of mouse Bcl-x(L) bound to a long helical fragment of Bim indicates that the structure of Bim is very different from proteins with a Bcl-2-like fold and may leave the BH3 region of Bim constitutively exposed. Based on the structural homology between Bcl-x(L) and Bax, we predicted that binding of Bim to Bax would require displacement of the Bax penultimate alpha helix. Consistent with this prediction, truncation of this short helix was required for Bim/Bax interaction and led to spontaneous activation of Bax. Our results suggest a way in which both Bim and Bax/Bak might be required for activated T cell apoptosis.

  • Organizational Affiliation

    Howard Hughes Medical Institute, National Jewish Medical and Research Center, 1400 Jackson Street, Denver, CO 80206, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Apoptosis regulator Bcl-X196Mus musculusMutation(s): 0 
Find proteins for Q64373 (Mus musculus)
Explore Q64373 
Go to UniProtKB:  Q64373
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ64373
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.61α = 90
b = 63.61β = 90
c = 109.6γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Refinement description