4BD6

Bax domain swapped dimer in complex with BaxBH3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.494 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.246 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Bax Crystal Structures Reveal How Bh3 Domains Activate Bax and Nucleate its Oligomerization to Induce Apoptosis.

Czabotar, P.E.Westphal, D.Dewson, G.Ma, S.Hockings, C.Fairlie, W.D.Lee, E.F.Yao, S.Robin, A.Y.Smith, B.J.Huang, D.C.Kluck, R.M.Adams, J.M.Colman, P.M.

(2013) Cell 152: 519

  • DOI: 10.1016/j.cell.2012.12.031
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In stressed cells, apoptosis ensues when Bcl-2 family members Bax or Bak oligomerize and permeabilize the mitochondrial outer membrane. Certain BH3-only relatives can directly activate them to mediate this pivotal, poorly understood step. To clarify ...

    In stressed cells, apoptosis ensues when Bcl-2 family members Bax or Bak oligomerize and permeabilize the mitochondrial outer membrane. Certain BH3-only relatives can directly activate them to mediate this pivotal, poorly understood step. To clarify the conformational changes that induce Bax oligomerization, we determined crystal structures of BaxΔC21 treated with detergents and BH3 peptides. The peptides bound the Bax canonical surface groove but, unlike their complexes with prosurvival relatives, dissociated Bax into two domains. The structures define the sequence signature of activator BH3 domains and reveal how they can activate Bax via its groove by favoring release of its BH3 domain. Furthermore, Bax helices α2-α5 alone adopted a symmetric homodimer structure, supporting the proposal that two Bax molecules insert their BH3 domain into each other's surface groove to nucleate oligomerization. A planar lipophilic surface on this homodimer may engage the membrane. Our results thus define critical Bax transitions toward apoptosis.


    Organizational Affiliation

    The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria 3052, Australia. czabotar@wehi.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APOPTOSIS REGULATOR BAX
A
174Homo sapiensMutation(s): 2 
Gene Names: BAX (BCL2L4)
Find proteins for Q07812 (Homo sapiens)
Go to Gene View: BAX
Go to UniProtKB:  Q07812
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
APOPTOSIS REGULATOR BAX
C
34Homo sapiensMutation(s): 0 
Gene Names: BAX (BCL2L4)
Find proteins for Q07812 (Homo sapiens)
Go to Gene View: BAX
Go to UniProtKB:  Q07812
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.494 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.246 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 103.715α = 90.00
b = 103.715β = 90.00
c = 40.555γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release