Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 

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This is version 1.4 of the entry. See complete history


Crystal structure of rat Bcl-xL. Implications for the function of the Bcl-2 protein family.

Aritomi, M.Kunishima, N.Inohara, N.Ishibashi, Y.Ohta, S.Morikawa, K.

(1997) J Biol Chem 272: 27886-27892

  • DOI: https://doi.org/10.1074/jbc.272.44.27886
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Bcl-xL is a member of the Bcl-2 protein family, which regulates apoptosis. Preparation of recombinant rat Bcl-xL yielded two forms, one deamidated at -Asn-Gly- sequences to produce isoaspartates and the other not deamidated. The crystal structures of the two forms show that they both adopt an essentially identical backbone structure which resembles the fold of human Bcl-xL: three layers of two alpha-helices each, capped at one end by two short helices. Both forms have a long disordered region, which contains the potential deamidation sites. The molecular structure exhibits a low level of interhelical interactions, the presence of three cavities, and a notable hydrophobic cleft surrounded by walls rich in basic residues. These unique structural features may be favorable for its accommodation into membranes or for possible rearrangement to modulate homo-/heterodimerization. Homology modeling of Bcl-2 and Bax, based on the Bcl-xL structure, suggests that Bax has the strongest potential for membrane insertion. Furthermore, we found a possible interface for interaction with non-Bcl-2 family member proteins, such as CED-4 homologues.

  • Organizational Affiliation

    Biomolecular Engineering Research Institute, 6-2-3 Furuedai, Suita-city, Osaka 565, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
APOPTOSIS REGULATOR BCL-X196Rattus norvegicusMutation(s): 0 
Find proteins for P53563 (Rattus norvegicus)
Explore P53563 
Go to UniProtKB:  P53563
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP53563
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.05α = 90
b = 64.05β = 90
c = 112.27γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection
  • Version 1.4: 2024-02-07
    Changes: Data collection, Database references