6TRR

Structural insight into tanapoxvirus mediated inhibition of apoptosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insight into tanapoxvirus-mediated inhibition of apoptosis.

Suraweera, C.D.Anasir, M.I.Chugh, S.Javorsky, A.Impey, R.E.Hasan Zadeh, M.Soares da Costa, T.P.Hinds, M.G.Kvansakul, M.

(2020) FEBS J 287: 3733-3750

  • DOI: https://doi.org/10.1111/febs.15365
  • Primary Citation of Related Structures:  
    6TQP, 6TQQ, 6TRR

  • PubMed Abstract: 

    Premature programmed cell death or apoptosis of cells is a strategy utilized by multicellular organisms to counter microbial threats. Tanapoxvirus (TANV) is a large double-stranded DNA virus belonging to the poxviridae that causes mild monkeypox-like infections in humans and primates. TANV encodes for a putative apoptosis inhibitory protein 16L. We show that TANV16L is able to bind to a range of peptides spanning the BH3 motif of human proapoptotic Bcl-2 proteins and is able to counter growth arrest of yeast induced by human Bak and Bax. We then determined the crystal structures of TANV16L bound to three identified interactors, Bax, Bim and Puma BH3. TANV16L adopts a globular Bcl-2 fold comprising 7 α-helices and utilizes the canonical Bcl-2 binding groove to engage proapoptotic host cell Bcl-2 proteins. Unexpectedly, TANV16L is able to adopt both a monomeric and a domain-swapped dimeric topology where the α1 helix from one protomer is swapped into a neighbouring unit. Despite adopting two different oligomeric forms, the canonical ligand binding groove in TANV16L remains unchanged from monomer to domain-swapped dimer. Our results provide a structural and mechanistic basis for tanapoxvirus-mediated inhibition of host cell apoptosis and reveal the capacity of Bcl-2 proteins to adopt differential oligomeric states whilst maintaining the canonical ligand binding groove in an unchanged state. DATABASE: Structural data are available in the Protein Data Bank (PDB) under the accession numbers 6TPQ, 6TQQ and 6TRR.


  • Organizational Affiliation

    Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
16L protein152Yaba-like disease virusMutation(s): 0 
Gene Names: 16L
UniProt
Find proteins for Q9DHU6 (Yaba-like disease virus)
Explore Q9DHU6 
Go to UniProtKB:  Q9DHU6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9DHU6
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Apoptosis regulator BAX28Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q07812 (Homo sapiens)
Explore Q07812 
Go to UniProtKB:  Q07812
GTEx:  ENSG00000087088 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ07812
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.240 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.376α = 90
b = 55.376β = 90
c = 126.945γ = 90
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaFT130101349
National Health and Medical Research Council (NHMRC, Australia)AustraliaAPP1007918

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-03
    Type: Initial release
  • Version 1.1: 2020-12-16
    Changes: Database references, Derived calculations
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description