Crystal structure of channel catfish BAX

Experimental Data Snapshot

  • Resolution: 2.44 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Ensemble Properties of Bax Determine Its Function.

Robin, A.Y.Iyer, S.Birkinshaw, R.W.Sandow, J.Wardak, A.Luo, C.S.Shi, M.Webb, A.I.Czabotar, P.E.Kluck, R.M.Colman, P.M.

(2018) Structure 26: 1346

  • DOI: https://doi.org/10.1016/j.str.2018.07.006
  • Primary Citation of Related Structures:  
    5W5X, 5W5Z, 5W60, 5W61, 5W62, 5W63

  • PubMed Abstract: 

    BAX and BAK are essential mediators of intrinsic apoptosis that permeabilize the mitochondrial outer membrane. BAX activation requires its translocation from cytosol to mitochondria where conformational changes cause its oligomerization. To better understand the critical step of translocation, we examined its blockade by mutation near the C terminus (P168G) or by antibody binding near the N terminus. Similarities in the crystal structures of wild-type and BAX P168G but significant other differences suggest that cytosolic BAX exists as an ensemble of conformers, and that the distribution of conformers within the ensemble determines the different functions of wild-type and mutant proteins. We also describe the structure of BAX in complex with an antibody, 3C10, that inhibits cytosolic BAX by limiting exposure of the membrane-associating helix α9, as does the P168G mutation. Our data for both means of BAX inhibition argue for an allosteric model of BAX regulation that derives from properties of the ensemble of conformers.

  • Organizational Affiliation

    Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC 3052, Australia; Department of Medical Biology, The University of Melbourne, Melbourne, VIC 3052, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Apoptosis regulator bax189Ictalurus punctatusMutation(s): 2 
Gene Names: BAX
Find proteins for E3TFZ1 (Ictalurus punctatus)
Explore E3TFZ1 
Go to UniProtKB:  E3TFZ1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE3TFZ1
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.44 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.177 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.963α = 90
b = 58.49β = 90
c = 71.984γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-27
    Type: Initial release
  • Version 1.1: 2018-08-29
    Changes: Data collection, Database references
  • Version 1.2: 2018-09-05
    Changes: Data collection, Database references
  • Version 1.3: 2018-10-17
    Changes: Data collection, Database references
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description