3ZIN

Gu_alpha_helicase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Distinctive Conformation of Minor Site-Specific Nuclear Localization Signals Bound to Importin-Alpha

Chang, C.-W.Counago, R.M.Williams, S.J.Boden, M.Kobe, B.

(2013) Traffic 14: 1144

  • DOI: 10.1111/tra.12098
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Nuclear localization signals (NLSs) contain one or two clusters of basic residues and are recognized by the import receptor importin-α. There are two NLS-binding sites (major and minor) on importin-α and the major NLS-binding site is considered to be ...

    Nuclear localization signals (NLSs) contain one or two clusters of basic residues and are recognized by the import receptor importin-α. There are two NLS-binding sites (major and minor) on importin-α and the major NLS-binding site is considered to be the primary binding site. Here, we used crystallographic and biochemical methods to investigate the binding between importin-α and predicted 'minor site-specific' NLSs: four peptide library-derived peptides, and the NLS from mouse RNA helicase II/Guα. The crystal structures reveal that these atypical NLSs indeed preferentially bind to the minor NLS-binding site. Unlike previously characterized NLSs, the C-terminal residues of these NLSs form an α-helical turn, stabilized by internal H-bond and cation-π interactions between the aromatic residues from the NLSs and the positively charged residues from importin-α. This helical turn sterically hinders binding at the major NLS-binding site, explaining the minor-site preference. Our data suggest the sequence RXXKR[K/X][F/Y/W]XXAF as the optimal minor NLS-binding site-specific motif, which may help identify novel proteins with atypical NLSs.


    Organizational Affiliation

    School of Chemistry and Molecular Biosciences and Institute for Molecular Bioscience, University of Queensland, Brisbane, Qld, 4072, Australia; Australian Infectious Diseases Research Centre, University of Queensland, Brisbane, Qld, 4072, Australia.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMPORTIN SUBUNIT ALPHA-2
A
461Mus musculusMutation(s): 0 
Gene Names: Kpna2Rch1
Find proteins for P52293 (Mus musculus)
Go to UniProtKB:  P52293
NIH Common Fund Data Resources
IMPC  MGI:103561
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NUCLEOLAR RNA HELICASE 2
B, C
14Mus musculusMutation(s): 0 
Gene Names: Ddx21
EC: 3.6.4.13
Find proteins for Q9JIK5 (Mus musculus)
Go to UniProtKB:  Q9JIK5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.094α = 90
b = 90.262β = 90
c = 100.704γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-21
    Type: Initial release
  • Version 1.1: 2013-10-30
    Changes: Database references