2YQ6

Structure of Bcl-xL bound to BimSAHB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Stabilizing the Pro-Apoptotic Bimbh3 Helix (Bimsahb) Does not Necessarily Enhance Affinity or Biological Activity.

Okamoto, T.Zobel, K.Fedorova, A.Quan, C.Yang, H.Fairbrother, W.J.Huang, D.C.S.Smith, B.J.Deshayes, K.Czabotar, P.E.

(2013) ACS Chem Biol 8: 297

  • DOI: https://doi.org/10.1021/cb3005403
  • Primary Citation of Related Structures:  
    2YQ6, 2YQ7

  • PubMed Abstract: 

    An attractive approach for developing therapeutic peptides is to enhance binding to their targets by stabilizing their α-helical conformation, for example, stabilized BimBH3 peptides (BimSAHB) designed to induce apoptosis. Unexpectedly, we found that such modified peptides have reduced affinity for their targets, the pro-survival Bcl-2 proteins. We attribute this loss in affinity to disruption of a network of stabilizing intramolecular interactions present in the bound state of the native peptide. Altering this network may compromise binding affinity, as in the case of the BimBH3 stapled peptide studied here. Moreover, cells exposed to these peptides do not readily undergo apoptosis, strongly indicating that BimSAHB is not inherently cell permeable.


  • Organizational Affiliation

    The Walter and Eliza Hall Institute of Medical Research , 1G Royal Parade, Parkville, Victoria 3052, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BCL-2-LIKE PROTEIN 1158Homo 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
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
BIM BETA 519Homo sapiensMutation(s): 3 
UniProt & NIH Common Fund Data Resources
Find proteins for O43521 (Homo sapiens)
Explore O43521 
Go to UniProtKB:  O43521
PHAROS:  O43521
GTEx:  ENSG00000153094 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO43521
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.736α = 90
b = 35.336β = 100.61
c = 61.412γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-11-28
    Type: Initial release
  • Version 1.1: 2013-02-27
    Changes: Database references
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description