1F59 | pdb_00001f59

IMPORTIN-BETA-FXFG NUCLEOPORIN COMPLEX

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 
    0.262 (Depositor) 
  • R-Value Work: 
    0.225 (Depositor) 

wwPDB Validation 3D Report Full Report

Validation slider image for 1F59

This is version 1.4 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

  • DOI: https://doi.org/10.1016/s0092-8674(00)00014-3
  • Primary Citation Related Structures: 
    1F59

  • 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 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.

Macromolecule Content 

  • Total Structure Weight: 104.14 kDa 
  • Atom Count: 7,158 
  • Modeled Residue Count: 922 
  • Deposited Residue Count: 940 
  • Unique protein chains: 2

Macromolecules

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|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
IMPORTIN BETA-1
A, B
442Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q14974 (Homo sapiens)
Explore Q14974 
Go to UniProtKB:  Q14974
PHAROS:  Q14974
GTEx:  ENSG00000108424 
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14974
Sequence Annotations
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Reference Sequence
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|  3D Structure
Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
FXFG NUCLEOPORIN REPEATS
C, D
28Saccharomyces cerevisiaeMutation(s): 0 

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free:  0.262 (Depositor) 
  • R-Value Work:  0.225 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.246α = 90
b = 211.79β = 90
c = 125.815γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-08-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation
  • Version 1.4: 2024-02-07
    Changes: Data collection, Database references