1IKN

IKAPPABALPHA/NF-KAPPAB COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of the IkappaBalpha/NF-kappaB complex reveals mechanisms of NF-kappaB inactivation.

Huxford, T.Huang, D.B.Malek, S.Ghosh, G.

(1998) Cell 95: 759-770


  • PubMed Abstract: 
  • IkappaBalpha regulates the transcription factor NF-kappaB through the formation of stable IkappaBalpha/NF-kappaB complexes. Prior to induction, IkappaBalpha retains NF-kappaB in the cytoplasm until the NF-kappaB activation signal is received. After a ...

    IkappaBalpha regulates the transcription factor NF-kappaB through the formation of stable IkappaBalpha/NF-kappaB complexes. Prior to induction, IkappaBalpha retains NF-kappaB in the cytoplasm until the NF-kappaB activation signal is received. After activation, NF-kappaB is removed from gene promoters through association with nuclear IkappaBalpha, restoring the preinduction state. The 2.3 A crystal structure of IkappaBalpha in complex with the NF-kappaB p50/p65 heterodimer reveals mechanisms of these inhibitory activities. The presence of IkappaBalpha allows large en bloc movement of the NF-kappaB p65 subunit amino-terminal domain. This conformational change induces allosteric inhibition of NF-kappaB DNA binding. Amino acid residues immediately preceding the nuclear localization signals of both NF-kappaB p50 and p65 subunits are tethered to the IkappaBalpha amino-terminal ankyrin repeats, impeding NF-kappaB from nuclear import machinery recognition.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla 92093-0359, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (NF-KAPPA-B P65 SUBUNIT)
A
286Mus musculusGene Names: Rela (Nfkb3)
Find proteins for Q04207 (Mus musculus)
Go to UniProtKB:  Q04207
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (NF-KAPPA-B P50D SUBUNIT)
C
119Mus musculusGene Names: Nfkb1
Find proteins for P25799 (Mus musculus)
Go to UniProtKB:  P25799
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (I-KAPPA-B-ALPHA)
D
236Homo sapiensGene Names: NFKBIA (IKBA, MAD3, NFKBI)
Find proteins for P25963 (Homo sapiens)
Go to Gene View: NFKBIA
Go to UniProtKB:  P25963
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.223 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 124.500α = 90.00
b = 49.300β = 108.70
c = 120.600γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
AMoREphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-04-12
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance