BimBH3 peptide tetramer

Experimental Data Snapshot

  • Resolution: 1.31 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.140 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Biophysical Characterization of Pro-apoptotic BimBH3 Peptides Reveals an Unexpected Capacity for Self-Association.

Assafa, T.E.Nandi, S.Smilowicz, D.Galazzo, L.Teucher, M.Elsner, C.Putz, S.Bleicken, S.Robin, A.Y.Westphal, D.Uson, I.Stoll, R.Czabotar, P.E.Metzler-Nolte, N.Bordignon, E.

(2021) Structure 29: 114-124.e3

  • DOI: https://doi.org/10.1016/j.str.2020.09.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Bcl-2 proteins orchestrate the mitochondrial pathway of apoptosis, pivotal for cell death. Yet, the structural details of the conformational changes of pro- and antiapoptotic proteins and their interactions remain unclear. Pulse dipolar spectroscopy (double electron-electron resonance [DEER], also known as PELDOR) in combination with spin-labeled apoptotic Bcl-2 proteins unveils conformational changes and interactions of each protein player via detection of intra- and inter-protein distances. Here, we present the synthesis and characterization of pro-apoptotic BimBH3 peptides of different lengths carrying cysteines for labeling with nitroxide or gadolinium spin probes. We show by DEER that the length of the peptides modulates their homo-interactions in the absence of other Bcl-2 proteins and solve by X-ray crystallography the structure of a BimBH3 tetramer, revealing the molecular details of the inter-peptide interactions. Finally, we prove that using orthogonal labels and three-channel DEER we can disentangle the Bim-Bim, Bcl-xL-Bcl-xL, and Bim-Bcl-xL interactions in a simplified interactome.

  • Organizational Affiliation

    Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Bochum, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bcl-2-like protein 11
A, B, C, D
27Homo sapiensMutation(s): 1 
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
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SCN

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.31 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.140 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.56α = 90
b = 37.56β = 90
c = 128.48γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia1079700

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-09
    Type: Initial release
  • Version 1.1: 2020-10-07
    Changes: Database references
  • Version 1.2: 2021-02-17
    Changes: Database references