3EYL

Crystal structure of XIAP BIR3 domain in complex with a Smac-mimetic compound


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Designing Smac-mimetics as antagonists of XIAP, cIAP1, and cIAP2.

Cossu, F.Mastrangelo, E.Milani, M.Sorrentino, G.Lecis, D.Delia, D.Manzoni, L.Seneci, P.Scolastico, C.Bolognesi, M.

(2009) Biochem.Biophys.Res.Commun. 378: 162-167

  • DOI: 10.1016/j.bbrc.2008.10.139

  • PubMed Abstract: 
  • Inhibitor of apoptosis proteins (IAPs) such as XIAP, cIAP1, and cIAP2 are upregulated in many cancer cells. Several compounds targeting IAPs and inducing cell death in cancer cells have been developed. Some of these are synthesized mimicking the N-te ...

    Inhibitor of apoptosis proteins (IAPs) such as XIAP, cIAP1, and cIAP2 are upregulated in many cancer cells. Several compounds targeting IAPs and inducing cell death in cancer cells have been developed. Some of these are synthesized mimicking the N-terminal tetrapeptide sequence of Smac/DIABLO, the natural endogenous IAPs inhibitor. Starting from such conceptual design, we generated a library of 4-substituted azabicyclo[5.3.0]alkane Smac-mimetics. Here we report the crystal structure of the BIR3 domain from XIAP in complex with Smac037, a compound designed according to structural principles emerging from our previously analyzed XIAP BIR3/Smac-mimetic complexes. In parallel, we present an in silico docking analysis of three Smac-mimetics to the BIR3 domain of cIAP1, providing general considerations for the development of high affinity lead compounds targeting three members of the IAP family.


    Organizational Affiliation

    Department of Biomolecular Sciences and Biotechnology, University of Milano, Via Celoria 26, I-20133 Milano, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Baculoviral IAP repeat-containing protein 4
A, B
122Homo sapiensGene Names: XIAP (API3, BIRC4, IAP3)
EC: 6.3.2.-
Find proteins for P98170 (Homo sapiens)
Go to Gene View: XIAP
Go to UniProtKB:  P98170
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SMK
Query on SMK

Download SDF File 
Download CCD File 
A, B
(3S,6S,7R,9aS)-6-{[(2S)-2-aminobutanoyl]amino}-7-(2-aminoethyl)-N-(diphenylmethyl)-5-oxooctahydro-1H-pyrrolo[1,2-a]azepine-3-carboxamide
C29 H39 N5 O3
KQHWCFZCUNTTCW-VEGWMBEDSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SMKKi: 220 nM (100) BINDINGDB
SMKIC50: 86 - 250 nM (99) BINDINGDB
SMKIC50: 250 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.189 
  • Space Group: I 41 3 2
Unit Cell:
Length (Å)Angle (°)
a = 170.423α = 90.00
b = 170.423β = 90.00
c = 170.423γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
DNAdata collection
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Refinement description, Version format compliance