1K3Z

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.181 

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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:  
    1OY3, 1K3Z

  • 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 similar to that of the IkappaBalpha ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor p65A, B136Mus musculusMutation(s): 0 
Gene Names: RelaNfkb3
UniProt
Find proteins for Q04207 (Mus musculus)
Explore Q04207 
Go to UniProtKB:  Q04207
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
transcription factor inhibitor I-kappa-B-betaC [auth D]282Mus musculusMutation(s): 5 
Gene Names: NfkbibIkbb
UniProt
Find proteins for Q60778 (Mus musculus)
Explore Q60778 
Go to UniProtKB:  Q60778
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.181 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.4α = 95.17
b = 48.92β = 91.8
c = 59.47γ = 105.45
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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