1F59

IMPORTIN-BETA-FXFG NUCLEOPORIN COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for the interaction between FxFG nucleoporin repeats and importin-beta in nuclear trafficking.

Bayliss, R.Littlewood, T.Stewart, M.

(2000) Cell 102: 99-108


  • PubMed Abstract: 
  • We describe the crystal structure of a complex between importin-beta residues 1-442 (Ib442) and five FxFG nucleoporin repeats from Nsp1p. Nucleoporin FxFG cores bind on the convex face of Ib442 to a primary site between the A helices of HEAT repeats ...

    We describe the crystal structure of a complex between importin-beta residues 1-442 (Ib442) and five FxFG nucleoporin repeats from Nsp1p. Nucleoporin FxFG cores bind on the convex face of Ib442 to a primary site between the A helices of HEAT repeats 5 and 6, and to a secondary site between HEAT repeats 6 and 7. Mutations at importin-beta Ile178 in the primary FxFG binding site reduce both binding and nuclear protein import, providing direct evidence for the functional significance of the importin-beta-FxFG interaction. The FxFG binding sites on importin-beta do not overlap with the RanGTP binding site. Instead, RanGTP may release importin-beta from FxFG nucleoporins by generating a conformational change that alters the structure of the FxFG binding site.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMPORTIN BETA-1
A, B
442Homo sapiensMutation(s): 0 
Gene Names: KPNB1 (NTF97)
Find proteins for Q14974 (Homo sapiens)
Go to Gene View: KPNB1
Go to UniProtKB:  Q14974
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FXFG NUCLEOPORIN REPEATS
C, D
28N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
C, D
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.225 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 67.246α = 90.00
b = 211.790β = 90.00
c = 125.815γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
MOSFLMdata reduction
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-01-31
    Type: Experimental preparation