4HNJ

Crystallographic structure of BCL-xL domain-swapped dimer in complex with PUMA BH3 peptide at 2.9A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

PUMA binding induces partial unfolding within BCL-xL to disrupt p53 binding and promote apoptosis.

Follis, A.V.Chipuk, J.E.Fisher, J.C.Yun, M.K.Grace, C.R.Nourse, A.Baran, K.Ou, L.Min, L.White, S.W.Green, D.R.Kriwacki, R.W.

(2013) Nat.Chem.Biol. 9: 163-168

  • DOI: 10.1038/nchembio.1166
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Following DNA damage, nuclear p53 induces the expression of PUMA, a BH3-only protein that binds and inhibits the antiapoptotic BCL-2 repertoire, including BCL-xL. PUMA, unique among BH3-only proteins, disrupts the interaction between cytosolic p53 an ...

    Following DNA damage, nuclear p53 induces the expression of PUMA, a BH3-only protein that binds and inhibits the antiapoptotic BCL-2 repertoire, including BCL-xL. PUMA, unique among BH3-only proteins, disrupts the interaction between cytosolic p53 and BCL-xL, allowing p53 to promote apoptosis via direct activation of the BCL-2 effector molecules BAX and BAK. Structural investigations using NMR spectroscopy and X-ray crystallography revealed that PUMA binding induced partial unfolding of two α-helices within BCL-xL. Wild-type PUMA or a PUMA mutant incapable of causing binding-induced unfolding of BCL-xL equivalently inhibited the antiapoptotic BCL-2 repertoire to sensitize for death receptor-activated apoptosis, but only wild-type PUMA promoted p53-dependent, DNA damage-induced apoptosis. Our data suggest that PUMA-induced partial unfolding of BCL-xL disrupts interactions between cytosolic p53 and BCL-xL, releasing the bound p53 to initiate apoptosis. We propose that regulated unfolding of BCL-xL provides a mechanism to promote PUMA-dependent signaling within the apoptotic pathways.


    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bcl-2-like protein 1
A, B
212Homo sapiensGene Names: BCL2L1 (BCL2L, BCLX)
Find proteins for Q07817 (Homo sapiens)
Go to Gene View: BCL2L1
Go to UniProtKB:  Q07817
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Bcl-2-binding component 3
C
25Homo sapiensGene Names: BBC3 (PUMA)
Find proteins for Q9BXH1 (Homo sapiens)
Go to Gene View: BBC3
Go to UniProtKB:  Q9BXH1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.206 
  • Space Group: P 42 2 2
Unit Cell:
Length (Å)Angle (°)
a = 94.829α = 90.00
b = 94.829β = 90.00
c = 111.542γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
MAR345data collection
DENZOdata reduction
PHENIXrefinement
PHASERphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-23
    Type: Initial release
  • Version 1.1: 2013-02-06
    Type: Database references
  • Version 1.2: 2013-03-06
    Type: Database references
  • Version 1.3: 2017-11-15
    Type: Refinement description