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: 2.9 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 

wwPDB Validation 3D Report Full Report


This is version 1.2 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


  • 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 (PTH ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Importin beta-1 subunit
S
485Homo sapiensGene Names: KPNB1 (NTF97)
Find proteins for Q14974 (Homo sapiens)
Go to Gene View: KPNB1
Go to UniProtKB:  Q14974
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Parathyroid hormone-related protein
Q
28Homo sapiensGene Names: PTHLH (PTHRP)
Find proteins for P12272 (Homo sapiens)
Go to Gene View: PTHLH
Go to UniProtKB:  P12272
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 92.792α = 90.00
b = 105.447β = 90.00
c = 146.738γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-21
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance