1NFI

I-KAPPA-B-ALPHA/NF-KAPPA-B COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of an IkappaBalpha/NF-kappaB complex.

Jacobs, M.D.Harrison, S.C.

(1998) Cell 95: 749-758


  • PubMed Abstract: 
  • The inhibitory protein, IkappaBalpha, sequesters the transcription factor, NF-kappaB, as an inactive complex in the cytoplasm. The structure of the IkappaBalpha ankyrin repeat domain, bound to a partially truncated NF-kappaB heterodimer (p50/ p65), h ...

    The inhibitory protein, IkappaBalpha, sequesters the transcription factor, NF-kappaB, as an inactive complex in the cytoplasm. The structure of the IkappaBalpha ankyrin repeat domain, bound to a partially truncated NF-kappaB heterodimer (p50/ p65), has been determined by X-ray crystallography at 2.7 A resolution. It shows a stack of six IkappaBalpha ankyrin repeats facing the C-terminal domains of the NF-kappaB Rel homology regions. Contacts occur in discontinuous patches, suggesting a combinatorial quality for ankyrin repeat specificity. The first two repeats cover an alpha helically ordered segment containing the p65 nuclear localization signal. The position of the sixth ankyrin repeat shows that full-length IkappaBalpha will occlude the NF-kappaB DNA-binding cleft. The orientation of IkappaBalpha in the complex places its N- and C-terminal regions in appropriate locations for their known regulatory functions.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NF-KAPPA-B P65
A, C
301Homo sapiensGene Names: RELA (NFKB3)
Find proteins for Q04206 (Homo sapiens)
Go to Gene View: RELA
Go to UniProtKB:  Q04206
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NF-KAPPA-B P50
B, D
107Homo sapiensGene Names: NFKB1
Find proteins for P19838 (Homo sapiens)
Go to Gene View: NFKB1
Go to UniProtKB:  P19838
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
I-KAPPA-B-ALPHA
E, F
213Homo 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: 2.7 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 49.094α = 90.00
b = 91.080β = 96.32
c = 190.980γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-18
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance