1M5N

Crystal structure of HEAT repeats (1-11) of importin b bound to the non-classical NLS(67-94) of PTHrP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Molecular basis for the recognition of a nonclassical nuclear localization signal by importin beta

Cingolani, G.Bednenko, J.Gillespie, M.T.Gerace, L.

(2002) Mol Cell 10: 1345-1353

  • DOI: https://doi.org/10.1016/s1097-2765(02)00727-x
  • Primary Citation of Related Structures:  
    1M5N

  • PubMed Abstract: 

    Nuclear import of proteins containing a classical nuclear localization signal (NLS) involves NLS recognition by importin alpha, which associates with importin beta via the IBB domain. Other proteins, including parathyroid hormone-related protein (PTHrP), are imported into the nucleus by direct interaction with importin beta. We solved the crystal structure of a fragment of importin beta-1 (1-485) bound to the nonclassical NLS of PTHrP. The structure reveals a second extended cargo binding site on importin beta distinct from the IBB domain binding site. Using a permeabilized cell import assay we demonstrate that importin beta (1-485) can import PTHrP-coupled cargo in a Ran-dependent manner. We propose that this region contains a prototypical nuclear import receptor domain, which could have evolved into the modern importin beta superfamily.


  • Organizational Affiliation

    Departments of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Importin beta-1 subunitA [auth S]485Homo 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
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Parathyroid hormone-related proteinB [auth Q]28N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P12272 (Homo sapiens)
Explore P12272 
Go to UniProtKB:  P12272
PHAROS:  P12272
GTEx:  ENSG00000087494 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12272
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.792α = 90
b = 105.447β = 90
c = 146.738γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-21
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Refinement description