4BD2

Bax domain swapped dimer in complex with BidBH3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 

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:  
    4BD2, 4BDU, 4BD6, 4BD7, 4BD8

  • 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 the conformational changes that induce Bax oligomerization, we determined crystal structures of BaxΔC21 treated with detergents and BH3 peptides ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APOPTOSIS REGULATOR BAXA174Homo sapiensMutation(s): 2 
Gene Names: BAXBCL2L4
UniProt & NIH Common Fund Data Resources
Find proteins for Q07812 (Homo sapiens)
Explore Q07812 
Go to UniProtKB:  Q07812
PHAROS:  Q07812
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BH3-INTERACTING DOMAIN DEATH AGONISTB [auth C]34Homo sapiensMutation(s): 0 
Gene Names: BID
UniProt & NIH Common Fund Data Resources
Find proteins for P55957 (Homo sapiens)
Explore P55957 
Go to UniProtKB:  P55957
PHAROS:  P55957
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.21 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.179 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.962α = 90
b = 101.962β = 90
c = 37.548γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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