1SE0

Crystal structure of DIAP1 BIR1 bound to a Grim peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular mechanisms of DrICE inhibition by DIAP1 and removal of inhibition by Reaper, Hid and Grim.

Yan, N.Wu, J.W.Chai, J.Li, W.Shi, Y.

(2004) Nat.Struct.Mol.Biol. 11: 420-428

  • DOI: 10.1038/nsmb764
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Drosophila melanogaster inhibitor of apoptosis protein DIAP1 suppresses apoptosis in part through inhibition of the effector caspase DrICE. The pro-death proteins Reaper, Hid and Grim (RHG) induce apoptosis by antagonizing DIAP1 function. However ...

    The Drosophila melanogaster inhibitor of apoptosis protein DIAP1 suppresses apoptosis in part through inhibition of the effector caspase DrICE. The pro-death proteins Reaper, Hid and Grim (RHG) induce apoptosis by antagonizing DIAP1 function. However, the underlying molecular mechanisms remain unknown. Here we demonstrate that DIAP1 directly inhibits the catalytic activity of DrICE through its BIR1 domain and this inhibition is countered effectively by the RHG proteins. Inhibition of DrICE by DIAP1 occurs only after the cleavage of its N-terminal 20 amino acids and involves a conserved surface groove on BIR1. Crystal structures of BIR1 bound to the RHG peptides show that the RHG proteins use their N-terminal IAP-binding motifs to bind to the same surface groove, hence relieving DIAP1-mediated inhibition of DrICE. These studies define novel molecular mechanisms for the inhibition and activation of a representative D. melanogaster effector caspase.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Washington Road, Princeton, New Jersey 08544, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Apoptosis 1 inhibitor
A
116Drosophila melanogasterGene Names: Diap1 (Iap1, th)
EC: 2.3.2.27
Find proteins for Q24306 (Drosophila melanogaster)
Go to UniProtKB:  Q24306
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cell death protein Grim
B
10Drosophila melanogasterGene Names: grim
Find proteins for Q24570 (Drosophila melanogaster)
Go to UniProtKB:  Q24570
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: 1.75 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.212 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 84.783α = 90.00
b = 84.783β = 90.00
c = 49.789γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-04-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance