Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 42.61 kDa 
• Atom Count: 2756 
• Residue Count: 384 
• Unique protein chains: 1

4S0P

Crystal Structure of the Autoinhibited Dimer of Pro-apoptotic BAX (II)

• DOI: 10.2210/pdb4S0P/pdb

• Classification: APOPTOSIS
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2015-01-04 Released: 2016-07-20 
• Deposition Author(s): Priyadarshi, A., Gavathiotis, E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.25 Å
• R-Value Free: 0.270 
• R-Value Work: 0.211 
• R-Value Observed: 0.214 

Literature

An Autoinhibited Dimeric Form of BAX Regulates the BAX Activation Pathway.

Garner, T.P., Reyna, D.E., Priyadarshi, A., Chen, H.C., Li, S., Wu, Y., Ganesan, Y.T., Malashkevich, V.N., Almo, S.S., Cheng, E.H., Gavathiotis, E.

(2016) Mol Cell 63: 485-497

• PubMed: 27425408 
• DOI: 10.1016/j.molcel.2016.06.010
• Primary Citation of Related Structures:  
  4S0O, 4S0P


• PubMed Abstract: 
  

Pro-apoptotic BAX is a cell fate regulator playing an important role in cellular homeostasis and pathological cell death. BAX is predominantly localized in the cytosol, where it has a quiescent monomer conformation. Following a pro-apoptotic trigger, cytosolic BAX is activated and translocates to the mitochondria to initiate mitochondrial dysfunction and apoptosis. Here, cellular, biochemical, and structural data unexpectedly demonstrate that cytosolic BAX also has an inactive dimer conformation that regulates its activation. The full-length crystal structure of the inactive BAX dimer revealed an asymmetric interaction consistent with inhibition of the N-terminal conformational change of one protomer and the displacement of the C-terminal helix α9 of the second protomer. This autoinhibited BAX dimer dissociates to BAX monomers before BAX can be activated. Our data support a model whereby the degree of apoptosis induction is regulated by the conformation of cytosolic BAX and identify an unprecedented mechanism of cytosolic BAX inhibition.

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Organizational Affiliation: 

Department of Biochemistry and Department of Medicine, Albert Einstein Cancer Center, Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Apoptosis regulator BAX	A, B	192	Homo sapiens	Mutation(s): 1  Gene Names: BAX, BCL2L4
Find proteins for Q07812 (Homo sapiens) Explore Q07812  Go to UniProtKB:  Q07812
NIH Common Fund Data Resources
PHAROS  Q07812 GTEx  ENSG00000087088

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.25 Å
• R-Value Free: 0.270 
• R-Value Work: 0.211 
• R-Value Observed: 0.214 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 40.587	α = 90
b = 65.01	β = 89.87
c = 65.59	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-01-04 
• Released Date: 2016-07-20 
Deposition Author(s): Priyadarshi, A., Gavathiotis, E.

Revision History 

• Version 1.0: 2016-07-20
  Type: Initial release
  
• Version 1.1: 2016-08-17
  Changes: Database references, Derived calculations
• Version 1.2: 2017-11-22
  Changes: Refinement description
• Version 1.3: 2019-07-17
  Changes: Data collection, Refinement description