3T6P

IAP antagonist-induced conformational change in cIAP1 promotes E3 ligase activation via dimerization


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.897 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Antagonists induce a conformational change in cIAP1 that promotes autoubiquitination.

Dueber, E.C.Schoeffler, A.J.Lingel, A.Elliott, J.M.Fedorova, A.V.Giannetti, A.M.Zobel, K.Maurer, B.Varfolomeev, E.Wu, P.Wallweber, H.J.Hymowitz, S.G.Deshayes, K.Vucic, D.Fairbrother, W.J.

(2011) Science 334: 376-380

  • DOI: 10.1126/science.1207862

  • PubMed Abstract: 
  • Inhibitor of apoptosis (IAP) proteins are negative regulators of cell death. IAP family members contain RING domains that impart E3 ubiquitin ligase activity. Binding of endogenous or small-molecule antagonists to select baculovirus IAP repeat (BIR) ...

    Inhibitor of apoptosis (IAP) proteins are negative regulators of cell death. IAP family members contain RING domains that impart E3 ubiquitin ligase activity. Binding of endogenous or small-molecule antagonists to select baculovirus IAP repeat (BIR) domains within cellular IAP (cIAP) proteins promotes autoubiquitination and proteasomal degradation and so releases inhibition of apoptosis mediated by cIAP. Although the molecular details of antagonist-BIR domain interactions are well understood, it is not clear how this binding event influences the activity of the RING domain. Here biochemical and structural studies reveal that the unliganded, multidomain cIAP1 sequesters the RING domain within a compact, monomeric structure that prevents RING dimerization. Antagonist binding induces conformational rearrangements that enable RING dimerization and formation of the active E3 ligase.


    Organizational Affiliation

    Department of Early Discovery Biochemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Baculoviral IAP repeat-containing protein 2
A
345Homo sapiensMutation(s): 1 
Gene Names: BIRC2 (API1, MIHB, RNF48)
EC: 2.3.2.27
Find proteins for Q13490 (Homo sapiens)
Go to Gene View: BIRC2
Go to UniProtKB:  Q13490
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.897 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 37.971α = 90.00
b = 85.432β = 90.00
c = 106.484γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release