3QA8

Crystal Structure of inhibitor of kappa B kinase beta


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.344 
  • R-Value Work: 0.308 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of inhibitor of kappaB kinase beta.

Xu, G.Lo, Y.C.Li, Q.Napolitano, G.Wu, X.Jiang, X.Dreano, M.Karin, M.Wu, H.

(2011) Nature --: --

  • DOI: 10.1038/nature09853
  • Primary Citation of Related Structures:  3QAD, 3RZF

  • PubMed Abstract: 
  • Inhibitor of κB (IκB) kinase (IKK) phosphorylates IκB proteins, leading to their degradation and the liberation of nuclear factor κB for gene transcription. Here we report the crystal structure of IKKβ in complex with an inhibitor, at a resolution of ...

    Inhibitor of κB (IκB) kinase (IKK) phosphorylates IκB proteins, leading to their degradation and the liberation of nuclear factor κB for gene transcription. Here we report the crystal structure of IKKβ in complex with an inhibitor, at a resolution of 3.6 Å. The structure reveals a trimodular architecture comprising the kinase domain, a ubiquitin-like domain (ULD) and an elongated, α-helical scaffold/dimerization domain (SDD). Unexpectedly, the predicted leucine zipper and helix-loop-helix motifs do not form these structures but are part of the SDD. The ULD and SDD mediate a critical interaction with IκBα that restricts substrate specificity, and the ULD is also required for catalytic activity. The SDD mediates IKKβ dimerization, but dimerization per se is not important for maintaining IKKβ activity and instead is required for IKKβ activation. Other IKK family members, IKKα, TBK1 and IKK-i, may have a similar trimodular architecture and function.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MGC80376 protein
A, B, C, D, E, F, G, H
676Xenopus laevisGene Names: ikbkb (MGC80376)
Find proteins for Q6INT1 (Xenopus laevis)
Go to UniProtKB:  Q6INT1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.344 
  • R-Value Work: 0.308 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 103.170α = 71.28
b = 140.339β = 79.56
c = 161.167γ = 86.04
Software Package:
Software NamePurpose
PHASESphasing
HKL-2000data scaling
HKL-2000data reduction
HKL-2000data collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance