Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 21.54 kDa 
• Atom Count: 1386 
• Residue Count: 187 
• Unique protein chains: 2

5UA4

Crystal structure of A179L:Bid BH3 complex

• DOI: 10.2210/pdb5UA4/pdb

• Classification: APOPTOSIS
• Organism(s): African swine fever virus, Sus scrofa
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2016-12-18 Released: 2017-01-04 
• Deposition Author(s): Banjara, S., Caria, S., Kvansakul, M.
• Funding Organization(s): Australian Research Council (ARC), National Health and Medical Research Council (NHMRC, Australia)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.263 
• R-Value Work: 0.216 
• R-Value Observed: 0.218 

Literature

Structural Insight into African Swine Fever Virus A179L-Mediated Inhibition of Apoptosis.

Banjara, S., Caria, S., Dixon, L.K., Hinds, M.G., Kvansakul, M.

(2017) J Virol 91

• PubMed: 28053104 
• DOI: 10.1128/JVI.02228-16
• Primary Citation of Related Structures:  
  5UA4, 5UA5


• PubMed Abstract: 
  

Programmed cell death is a tightly controlled process critical for the removal of damaged or infected cells. Pro- and antiapoptotic proteins of the Bcl-2 family are pivotal mediators of this process. African swine fever virus (ASFV) is a large DNA virus, the only member of the Asfarviridae family, and harbors A179L, a putative Bcl-2 like protein. A179L has been shown to bind to several proapoptotic Bcl-2 proteins; however, the hierarchy of binding and the structural basis for apoptosis inhibition are currently not understood. We systematically evaluated the ability of A179L to bind proapoptotic Bcl-2 family members and show that A179L is the first antiapoptotic Bcl-2 protein to bind to all major death-inducing mammalian Bcl-2 proteins. We then defined the structural basis for apoptosis inhibition of A179L by determining the crystal structures of A179L bound to both Bid and Bax BH3 motifs. Our findings provide a mechanistic understanding for the potent antiapoptotic activity of A179L by identifying it as the first panprodeath Bcl-2 binder and serve as a platform for more-detailed investigations into the role of A179L during ASFV infection. IMPORTANCE Numerous viruses have acquired strategies to subvert apoptosis by encoding proteins capable of sequestering proapoptotic host proteins. African swine fever virus (ASFV), a large DNA virus and the only member of the Asfarviridae family, encodes the protein A179L, which functions to prevent apoptosis. We show that A179L is unusual among antiapoptotic Bcl-2 proteins in being able to physically bind to all core death-inducing mammalian Bcl-2 proteins. Currently, little is known regarding the molecular interactions between A179L and the proapoptotic Bcl-2 members. Using the crystal structures of A179L bound to two of the identified proapoptotic Bcl-2 proteins, Bid and Bax, we now provide a three-dimensional (3D) view of how A179L sequesters host proapoptotic proteins, which is crucial for subverting premature host cell apoptosis.

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Organizational Affiliation: 

Department of Biochemistry & Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia [e-mail] [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
5-HL	A	153	African swine fever virus	Mutation(s): 0  Gene Names: 5-HL, A179L
Find proteins for P42485 (African swine fever virus (strain Badajoz 1971 Vero-adapted)) Explore P42485  Go to UniProtKB:  P42485

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BH3-interacting domain death agonist	B	34	Sus scrofa	Mutation(s): 0  Gene Names: BID
Find proteins for Q4JHS0 (Sus scrofa) Explore Q4JHS0  Go to UniProtKB:  Q4JHS0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.263 
• R-Value Work: 0.216 
• R-Value Observed: 0.218 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.761	α = 90
b = 48.778	β = 104.98
c = 56.535	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
xia2	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2016-12-18 
• Released Date: 2017-01-04 
Deposition Author(s): Banjara, S., Caria, S., Kvansakul, M.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	FT130101349
National Health and Medical Research Council (NHMRC, Australia)	Australia	APP1007918

Revision History 

• Version 1.0: 2017-01-04
  Type: Initial release
  
• Version 1.1: 2017-01-18
  Changes: Database references
• Version 1.2: 2017-03-15
  Changes: Database references
• Version 1.3: 2017-09-20
  Changes: Author supporting evidence, Data collection
• Version 1.4: 2017-11-01
  Changes: Author supporting evidence
• Version 1.5: 2020-01-01
  Changes: Author supporting evidence