2POP

The Crystal Structure of TAB1 and BIR1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.209 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

XIAP Induces NF-kappaB Activation via the BIR1/TAB1 Interaction and BIR1 Dimerization.

Lu, M.Lin, S.C.Huang, Y.Kang, Y.J.Rich, R.Lo, Y.C.Myszka, D.Han, J.Wu, H.

(2007) Mol Cell 26: 689-702

  • DOI: https://doi.org/10.1016/j.molcel.2007.05.006
  • Primary Citation of Related Structures:  
    2POI, 2POM, 2POP

  • PubMed Abstract: 

    In addition to caspase inhibition, X-linked inhibitor of apoptosis (XIAP) induces NF-kappaB and MAP kinase activation during TGF-b and BMP receptor signaling and upon overexpression. Here we show that the BIR1 domain of XIAP, which has no previously ascribed function, directly interacts with TAB1 to induce NF-kappaB activation. TAB1 is an upstream adaptor for the activation of the kinase TAK1, which in turn couples to the NF-kappaB pathway. We report the crystal structures of BIR1, TAB1, and the BIR1/TAB1 complex. The BIR1/TAB1 structure reveals a striking butterfly-shaped dimer and the detailed interaction between BIR1 and TAB1. Structure-based mutagenesis and knockdown of TAB1 show unambiguously that the BIR1/TAB1 interaction is crucial for XIAP-induced TAK1 and NF-kappaB activation. We show that although not interacting with BIR1, Smac, the antagonist for caspase inhibition by XIAP, also inhibits the XIAP/TAB1 interaction. Disruption of BIR1 dimerization abolishes XIAP-mediated NF-kappaB activation, implicating a proximity-induced mechanism for TAK1 activation.


  • Organizational Affiliation

    Department of Biochemistry, Weill Medical College of Cornell University, New York, NY 10021, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mitogen-activated protein kinase kinase kinase 7-interacting protein 1
A, C
353Homo sapiensMutation(s): 0 
Gene Names: TAB1MAP3K7IP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15750 (Homo sapiens)
Explore Q15750 
Go to UniProtKB:  Q15750
GTEx:  ENSG00000100324 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15750
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Baculoviral IAP repeat-containing protein 4
B, D
95Homo sapiensMutation(s): 0 
Gene Names: XIAPAPI3BIRC4IAP3
EC: 2.3.2.27
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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.986α = 90
b = 108.712β = 90
c = 175.698γ = 90
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 2007-07-03 
  • Deposition Author(s): Lin, S.C.

Revision History  (Full details and data files)

  • Version 1.0: 2007-07-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-06-14
    Changes: Database references, Refinement description, Source and taxonomy, Structure summary
  • Version 1.4: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description