1K3Z

X-ray crystal structure of the IkBb/NF-kB p65 homodimer complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray crystal structure of an IkappaBbeta x NF-kappaB p65 homodimer complex.

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

(2003) J.Biol.Chem. 278: 23094-23100

  • DOI: 10.1074/jbc.M301022200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report the crystal structure of a murine IkappaBbeta x NF-kappaB p65 homodimer complex. Crystallographic models were determined for two triclinic crystalline systems and refined against data at 2.5 and 2.1 A. The overall complex structure is simil ...

    We report the crystal structure of a murine IkappaBbeta x NF-kappaB p65 homodimer complex. Crystallographic models were determined for two triclinic crystalline systems and refined against data at 2.5 and 2.1 A. The overall complex structure is similar to that of the IkappaBalpha.NF-kappaB p50/p65 heterodimer complex. One NF-kappaB p65 subunit nuclear localization signal clearly contacts IkappaBbeta, whereas a homologous segment from the second subunit of the homodimer is mostly solvent-exposed. The unique 47-amino acid insertion between ankyrin repeats three and four of IkappaBbeta is mostly disordered in the structure. Primary sequence analysis and differences in the mode of binding at the IkappaBbeta sixth ankyrin repeat and NF-kappaB p65 homodimer suggest a model for nuclear IkappaBbeta.NF-kappaB.DNA ternary complex formation. These unique structural features of IkappaBbeta may contribute to its ability to mediate persistent NF-kappaB activation.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transcription factor p65
A, B
136Mus musculusMutation(s): 0 
Gene Names: Rela (Nfkb3)
Find proteins for Q04207 (Mus musculus)
Go to UniProtKB:  Q04207
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
transcription factor inhibitor I-kappa-B-beta
D
282Mus musculusMutation(s): 5 
Gene Names: Nfkbib (Ikbb)
Find proteins for Q60778 (Mus musculus)
Go to UniProtKB:  Q60778
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.181 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 46.400α = 95.17
b = 48.920β = 91.80
c = 59.470γ = 105.45
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance