6YLD

Crystal structure of Trichoplax adhaerens trBcl-2L2 bound to trBak BH3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Ancient and conserved functional interplay between Bcl-2 family proteins in the mitochondrial pathway of apoptosis.

Popgeorgiev, N.Sa, J.D.Jabbour, L.Banjara, S.Nguyen, T.T.M.Akhavan-E-Sabet, A.Gadet, R.Ralchev, N.Manon, S.Hinds, M.G.Osigus, H.J.Schierwater, B.Humbert, P.O.Rimokh, R.Gillet, G.Kvansakul, M.

(2020) Sci Adv 6

  • DOI: 10.1126/sciadv.abc4149
  • Primary Citation of Related Structures:  
    6YLD, 6YLI

  • PubMed Abstract: 
  • In metazoans, Bcl-2 family proteins are major regulators of mitochondrially mediated apoptosis; however, their evolution remains poorly understood. Here, we describe the molecular characterization of the four members of the Bcl-2 family in the most primitive metazoan, Trichoplax adhaerens All four trBcl-2 homologs are multimotif Bcl-2 group, with trBcl-2L1 and trBcl-2L2 being highly divergent antiapoptotic Bcl-2 members, whereas trBcl-2L3 and trBcl-2L4 are homologs of proapoptotic Bax and Bak, respectively ...

    In metazoans, Bcl-2 family proteins are major regulators of mitochondrially mediated apoptosis; however, their evolution remains poorly understood. Here, we describe the molecular characterization of the four members of the Bcl-2 family in the most primitive metazoan, Trichoplax adhaerens All four trBcl-2 homologs are multimotif Bcl-2 group, with trBcl-2L1 and trBcl-2L2 being highly divergent antiapoptotic Bcl-2 members, whereas trBcl-2L3 and trBcl-2L4 are homologs of proapoptotic Bax and Bak, respectively. trBax expression permeabilizes the mitochondrial outer membrane, while trBak operates as a BH3-only sensitizer repressing antiapoptotic activities of trBcl-2L1 and trBcl-2L2. The crystal structure of a trBcl-2L2:trBak BH3 complex reveals that trBcl-2L2 uses the canonical Bcl-2 ligand binding groove to sequester trBak BH3, indicating that the structural basis for apoptosis control is conserved from T. adhaerens to mammals. Finally, we demonstrate that both trBax and trBak BH3 peptides bind selectively to human Bcl-2 homologs to sensitize cancer cells to chemotherapy treatment.


    Organizational Affiliation

    La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia. nikolay.popgeorgiev@univ-lyon1.fr germain.gillet@univ-lyon1.fr m.kvansakul@latrobe.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bcl-2-like protein 1A, C154Trichoplax sp. H2Mutation(s): 0 
Gene Names: TrispH2_005532
UniProt
Find proteins for A0A369S2N9 (Trichoplax sp. H2)
Explore A0A369S2N9 
Go to UniProtKB:  A0A369S2N9
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Bcl-2 homologous antagonist/killerB, D26Trichoplax sp. H2Mutation(s): 0 
Gene Names: TrispH2_005529
UniProt
Find proteins for A0A369S334 (Trichoplax sp. H2)
Explore A0A369S334 
Go to UniProtKB:  A0A369S334
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.297α = 97.3
b = 40.859β = 90.085
c = 56.721γ = 101.088
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaDP190103591

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-17
    Type: Initial release