1TFT

NMR Structure of an Antagonists of the XIAP-Caspase-9 Interaction Complexed to the BIR3 domain of XIAP


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Discovery of potent antagonists of the antiapoptotic protein XIAP for the treatment of cancer.

Oost, T.K.Sun, C.Armstrong, R.C.Al-Assaad, A.S.Betz, S.F.Deckwerth, T.L.Ding, H.Elmore, S.W.Meadows, R.P.Olejniczak, E.T.Oleksijew, A.K.Oltersdorf, T.Rosenberg, S.H.Shoemaker, A.R.Tomaselli, K.J.Zou, H.Fesik, S.W.

(2004) J Med Chem 47: 4417-4426

  • DOI: https://doi.org/10.1021/jm040037k
  • Primary Citation of Related Structures:  
    1TFQ, 1TFT

  • PubMed Abstract: 

    Inhibitor of apoptosis (IAP) proteins are overexpressed in many cancers and have been implicated in tumor growth, pathogenesis, and resistance to chemo- or radiotherapy. On the basis of the NMR structure of a SMAC peptide complexed with the BIR3 domain of X-linked IAP (XIAP), a novel series of XIAP antagonists was discovered. The most potent compounds in this series bind to the baculovirus IAP repeat 3 (BIR3) domain of XIAP with single-digit nanomolar affinity and promote cell death in several human cancer cell lines. In a MDA-MB-231 breast cancer mouse xenograft model, these XIAP antagonists inhibited the growth of tumors. Close structural analogues that showed only weak binding to the XIAP-BIR3 domain were inactive in the cellular assays and showed only marginal in vivo activity. Our results are consistent with a mechanism in which ligands for the BIR3 domain of XIAP induce apoptosis by freeing up caspases. The present study validates the BIR3 domain of XIAP as a target and supports the use of small molecule XIAP antagonists as a potential therapy for cancers that overexpress XIAP.


  • Organizational Affiliation

    Cancer Research, Global Pharmaceutical Research and Development, Abbott Laboratories, 100 Abbott Park Road, Abbott Park, Illinois 60064, USA. thorsten.oost@abbott.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Baculoviral IAP repeat-containing protein 4117Homo sapiensMutation(s): 0 
Gene Names: BIRC4API3IAP3XIAP
UniProt & NIH Common Fund Data Resources
Find proteins for P98170 (Homo sapiens)
Explore P98170 
Go to UniProtKB:  P98170
GTEx:  ENSG00000101966 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP98170
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
997
Query on 997

Download Ideal Coordinates CCD File 
C [auth A]1-[3,3-DIMETHYL-2-(2-METHYLAMINO-PROPIONYLAMINO)-BUTYRYL]-4-PHENOXY-PYRROLIDINE-2-CARBOXYLIC ACID(1,2,3,4-TETRAHYDRO-NAPHTHALEN-1-YL)-AMIDE
C31 H42 N4 O4
QKPXPZYQPBWDHS-MCJAPYMPSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
997 BindingDB:  1TFT Kd: 5 (nM) from 1 assay(s)
PDBBind:  1TFT Kd: 5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2005-05-03
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Database references, Derived calculations